steve/lead-screw

Trapezoidal lead screw envelope: Tr8, Tr10, Tr12 and Tr16, leads 2 to 8 mm, any length.

v1.0.0 Latest STEVE MIT 0

Open in STEVE

Isometric

Parameters

Preset84 sizes

Nominal diameter

Tr8Tr10Tr12Tr16

Lead1–12 mm

Advance per turn. Names the screw; it doesn't change the envelope.

Length10–3000 mm

Defaults built

part.py 20 lines · Python · STEVE runtime · checked

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"""Trapezoidal lead screw envelope: a plain shaft at the major diameter d, axis along Z, centred on the origin. The

thread itself is not modelled, as in the library's threaded rods; `lead` only names the screw."""

from steve import Model

size = "Tr8" # Nominal diameter

lead = 2 # mm Lead per turn

length = 300 # mm Length

# nominal: major diameter d. ISO 2904:2020 Table 1 (d of Tr10, Tr12, Tr16, with P and minor diameter d3 in the README);

# the Tr8 x 2, 4 and 8 screws are commercial (ISO 2904 tabulates Tr8 x 1.5): d = 8 is their designation.

SCREWS = {"Tr8": 8, "Tr10": 10, "Tr12": 12, "Tr16": 16}

d = SCREWS[size]

model = Model()

with model.sketch("section", on="XY", name="Section") as sk:

sk.circle("outer", (0, 0), d / 2)

model.extrude("screw", "section", distance=length, both=True, name="Screw")

model.material("steel-generic", color="#b9bdc2")

result = model.result()

"""Trapezoidal lead screw envelope: a plain shaft at the major diameter d, axis along Z, centred on the origin. The
thread itself is not modelled, as in the library's threaded rods; `lead` only names the screw."""
from steve import Model

size = "Tr8"  # Nominal diameter
lead = 2  # mm Lead per turn
length = 300  # mm Length

# nominal: major diameter d. ISO 2904:2020 Table 1 (d of Tr10, Tr12, Tr16, with P and minor diameter d3 in the README);
# the Tr8 x 2, 4 and 8 screws are commercial (ISO 2904 tabulates Tr8 x 1.5): d = 8 is their designation.
SCREWS = {"Tr8": 8, "Tr10": 10, "Tr12": 12, "Tr16": 16}

d = SCREWS[size]
model = Model()
with model.sketch("section", on="XY", name="Section") as sk:
    sk.circle("outer", (0, 0), d / 2)
model.extrude("screw", "section", distance=length, both=True, name="Screw")
model.material("steel-generic", color="#b9bdc2")
result = model.result()

presets.toml 590 lines · TOML

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# Presets of this part (factory/PRESETS.md). Written by factory/gen.py.

[[presets]]

id = "Tr8x2-L100"

title = "Tr8 × 2, 100 mm"

params = { size = "Tr8", lead = 2, length = 100 }

aliases = ["T8x2", "T8 lead screw 100", "Tr8x2 lead screw", "T8 2mm lead 100mm", "screw=T8; pitch/lead=2 mm; length=100 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x2-L150"

title = "Tr8 × 2, 150 mm"

params = { size = "Tr8", lead = 2, length = 150 }

aliases = ["T8x2", "T8 lead screw 150", "Tr8x2 lead screw", "T8 2mm lead 150mm", "screw=T8; pitch/lead=2 mm; length=150 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x2-L200"

title = "Tr8 × 2, 200 mm"

params = { size = "Tr8", lead = 2, length = 200 }

aliases = ["T8x2", "T8 lead screw 200", "Tr8x2 lead screw", "T8 2mm lead 200mm", "screw=T8; pitch/lead=2 mm; length=200 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x2-L250"

title = "Tr8 × 2, 250 mm"

params = { size = "Tr8", lead = 2, length = 250 }

aliases = ["T8x2", "T8 lead screw 250", "Tr8x2 lead screw", "T8 2mm lead 250mm", "screw=T8; pitch/lead=2 mm; length=250 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x2-L300"

title = "Tr8 × 2, 300 mm"

params = { size = "Tr8", lead = 2, length = 300 }

aliases = ["T8x2", "T8 lead screw 300", "Tr8x2 lead screw", "T8 2mm lead 300mm", "screw=T8; pitch/lead=2 mm; length=300 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x2-L350"

title = "Tr8 × 2, 350 mm"

params = { size = "Tr8", lead = 2, length = 350 }

aliases = ["T8x2", "T8 lead screw 350", "Tr8x2 lead screw", "T8 2mm lead 350mm", "screw=T8; pitch/lead=2 mm; length=350 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x2-L400"

title = "Tr8 × 2, 400 mm"

params = { size = "Tr8", lead = 2, length = 400 }

aliases = ["T8x2", "T8 lead screw 400", "Tr8x2 lead screw", "T8 2mm lead 400mm", "screw=T8; pitch/lead=2 mm; length=400 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x2-L450"

title = "Tr8 × 2, 450 mm"

params = { size = "Tr8", lead = 2, length = 450 }

aliases = ["T8x2", "T8 lead screw 450", "Tr8x2 lead screw", "T8 2mm lead 450mm", "screw=T8; pitch/lead=2 mm; length=450 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x2-L500"

title = "Tr8 × 2, 500 mm"

params = { size = "Tr8", lead = 2, length = 500 }

aliases = ["T8x2", "T8 lead screw 500", "Tr8x2 lead screw", "T8 2mm lead 500mm", "screw=T8; pitch/lead=2 mm; length=500 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x2-L600"

title = "Tr8 × 2, 600 mm"

params = { size = "Tr8", lead = 2, length = 600 }

aliases = ["T8x2", "T8 lead screw 600", "Tr8x2 lead screw", "T8 2mm lead 600mm", "screw=T8; pitch/lead=2 mm; length=600 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x2-L750"

title = "Tr8 × 2, 750 mm"

params = { size = "Tr8", lead = 2, length = 750 }

aliases = ["T8x2", "T8 lead screw 750", "Tr8x2 lead screw", "T8 2mm lead 750mm", "screw=T8; pitch/lead=2 mm; length=750 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x2-L1000"

title = "Tr8 × 2, 1000 mm"

params = { size = "Tr8", lead = 2, length = 1000 }

aliases = ["T8x2", "T8 lead screw 1000", "Tr8x2 lead screw", "T8 2mm lead 1000mm", "screw=T8; pitch/lead=2 mm; length=1000 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x4-L100"

title = "Tr8 × 4, 100 mm"

params = { size = "Tr8", lead = 4, length = 100 }

aliases = ["T8x4", "T8 lead screw 100", "Tr8x4 lead screw", "T8 4mm lead 100mm", "screw=T8; pitch/lead=4 mm; length=100 mm; simplified thread envelope"]

standard = "ISO 2904"

[[presets]]

id = "Tr8x4-L150"

title = "Tr8 × 4, 150 mm"

params = { size = "Tr8", lead = 4, length = 150 }

aliases = ["T8x4", "T8 lead screw 150", "Tr8x4 lead screw", "T8 4mm lead 150mm", "screw=T8; pitch/lead=4 mm; length=150 mm; simplified thread envelope"]

standard = "ISO 2904"

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[[presets]]

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id = "Tr8x4-L200"

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title = "Tr8 × 4, 200 mm"

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params = { size = "Tr8", lead = 4, length = 200 }

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aliases = ["T8x4", "T8 lead screw 200", "Tr8x4 lead screw", "T8 4mm lead 200mm", "screw=T8; pitch/lead=4 mm; length=200 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x4-L250"

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title = "Tr8 × 4, 250 mm"

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params = { size = "Tr8", lead = 4, length = 250 }

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aliases = ["T8x4", "T8 lead screw 250", "Tr8x4 lead screw", "T8 4mm lead 250mm", "screw=T8; pitch/lead=4 mm; length=250 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x4-L300"

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title = "Tr8 × 4, 300 mm"

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params = { size = "Tr8", lead = 4, length = 300 }

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aliases = ["T8x4", "T8 lead screw 300", "Tr8x4 lead screw", "T8 4mm lead 300mm", "screw=T8; pitch/lead=4 mm; length=300 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x4-L350"

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title = "Tr8 × 4, 350 mm"

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params = { size = "Tr8", lead = 4, length = 350 }

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aliases = ["T8x4", "T8 lead screw 350", "Tr8x4 lead screw", "T8 4mm lead 350mm", "screw=T8; pitch/lead=4 mm; length=350 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x4-L400"

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title = "Tr8 × 4, 400 mm"

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params = { size = "Tr8", lead = 4, length = 400 }

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aliases = ["T8x4", "T8 lead screw 400", "Tr8x4 lead screw", "T8 4mm lead 400mm", "screw=T8; pitch/lead=4 mm; length=400 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x4-L450"

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title = "Tr8 × 4, 450 mm"

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params = { size = "Tr8", lead = 4, length = 450 }

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aliases = ["T8x4", "T8 lead screw 450", "Tr8x4 lead screw", "T8 4mm lead 450mm", "screw=T8; pitch/lead=4 mm; length=450 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x4-L500"

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title = "Tr8 × 4, 500 mm"

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params = { size = "Tr8", lead = 4, length = 500 }

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aliases = ["T8x4", "T8 lead screw 500", "Tr8x4 lead screw", "T8 4mm lead 500mm", "screw=T8; pitch/lead=4 mm; length=500 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x4-L600"

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title = "Tr8 × 4, 600 mm"

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params = { size = "Tr8", lead = 4, length = 600 }

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aliases = ["T8x4", "T8 lead screw 600", "Tr8x4 lead screw", "T8 4mm lead 600mm", "screw=T8; pitch/lead=4 mm; length=600 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x4-L750"

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title = "Tr8 × 4, 750 mm"

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params = { size = "Tr8", lead = 4, length = 750 }

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aliases = ["T8x4", "T8 lead screw 750", "Tr8x4 lead screw", "T8 4mm lead 750mm", "screw=T8; pitch/lead=4 mm; length=750 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x4-L1000"

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title = "Tr8 × 4, 1000 mm"

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params = { size = "Tr8", lead = 4, length = 1000 }

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aliases = ["T8x4", "T8 lead screw 1000", "Tr8x4 lead screw", "T8 4mm lead 1000mm", "screw=T8; pitch/lead=4 mm; length=1000 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L100"

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title = "Tr8 × 8, 100 mm"

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params = { size = "Tr8", lead = 8, length = 100 }

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aliases = ["T8x8", "T8 lead screw 100", "Tr8x8 lead screw", "T8 8mm lead 100mm", "screw=T8; pitch/lead=8 mm; length=100 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L150"

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title = "Tr8 × 8, 150 mm"

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params = { size = "Tr8", lead = 8, length = 150 }

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aliases = ["T8x8", "T8 lead screw 150", "Tr8x8 lead screw", "T8 8mm lead 150mm", "screw=T8; pitch/lead=8 mm; length=150 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L200"

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title = "Tr8 × 8, 200 mm"

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params = { size = "Tr8", lead = 8, length = 200 }

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aliases = ["T8x8", "T8 lead screw 200", "Tr8x8 lead screw", "T8 8mm lead 200mm", "screw=T8; pitch/lead=8 mm; length=200 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L250"

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title = "Tr8 × 8, 250 mm"

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params = { size = "Tr8", lead = 8, length = 250 }

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aliases = ["T8x8", "T8 lead screw 250", "Tr8x8 lead screw", "T8 8mm lead 250mm", "screw=T8; pitch/lead=8 mm; length=250 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L300"

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title = "Tr8 × 8, 300 mm"

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params = { size = "Tr8", lead = 8, length = 300 }

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aliases = ["T8x8", "T8 lead screw 300", "Tr8x8 lead screw", "T8 8mm lead 300mm", "screw=T8; pitch/lead=8 mm; length=300 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L350"

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title = "Tr8 × 8, 350 mm"

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params = { size = "Tr8", lead = 8, length = 350 }

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aliases = ["T8x8", "T8 lead screw 350", "Tr8x8 lead screw", "T8 8mm lead 350mm", "screw=T8; pitch/lead=8 mm; length=350 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L400"

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title = "Tr8 × 8, 400 mm"

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params = { size = "Tr8", lead = 8, length = 400 }

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aliases = ["T8x8", "T8 lead screw 400", "Tr8x8 lead screw", "T8 8mm lead 400mm", "screw=T8; pitch/lead=8 mm; length=400 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L450"

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title = "Tr8 × 8, 450 mm"

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params = { size = "Tr8", lead = 8, length = 450 }

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aliases = ["T8x8", "T8 lead screw 450", "Tr8x8 lead screw", "T8 8mm lead 450mm", "screw=T8; pitch/lead=8 mm; length=450 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L500"

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title = "Tr8 × 8, 500 mm"

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params = { size = "Tr8", lead = 8, length = 500 }

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aliases = ["T8x8", "T8 lead screw 500", "Tr8x8 lead screw", "T8 8mm lead 500mm", "screw=T8; pitch/lead=8 mm; length=500 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L600"

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title = "Tr8 × 8, 600 mm"

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params = { size = "Tr8", lead = 8, length = 600 }

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aliases = ["T8x8", "T8 lead screw 600", "Tr8x8 lead screw", "T8 8mm lead 600mm", "screw=T8; pitch/lead=8 mm; length=600 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L750"

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title = "Tr8 × 8, 750 mm"

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params = { size = "Tr8", lead = 8, length = 750 }

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aliases = ["T8x8", "T8 lead screw 750", "Tr8x8 lead screw", "T8 8mm lead 750mm", "screw=T8; pitch/lead=8 mm; length=750 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr8x8-L1000"

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title = "Tr8 × 8, 1000 mm"

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params = { size = "Tr8", lead = 8, length = 1000 }

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aliases = ["T8x8", "T8 lead screw 1000", "Tr8x8 lead screw", "T8 8mm lead 1000mm", "screw=T8; pitch/lead=8 mm; length=1000 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L100"

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title = "Tr10 × 2, 100 mm"

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params = { size = "Tr10", lead = 2, length = 100 }

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aliases = ["T10x2", "T10 lead screw 100", "Tr10x2 lead screw", "T10 2mm lead 100mm", "screw=T10; pitch/lead=2 mm; length=100 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L150"

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title = "Tr10 × 2, 150 mm"

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params = { size = "Tr10", lead = 2, length = 150 }

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aliases = ["T10x2", "T10 lead screw 150", "Tr10x2 lead screw", "T10 2mm lead 150mm", "screw=T10; pitch/lead=2 mm; length=150 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L200"

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title = "Tr10 × 2, 200 mm"

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params = { size = "Tr10", lead = 2, length = 200 }

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aliases = ["T10x2", "T10 lead screw 200", "Tr10x2 lead screw", "T10 2mm lead 200mm", "screw=T10; pitch/lead=2 mm; length=200 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L250"

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title = "Tr10 × 2, 250 mm"

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params = { size = "Tr10", lead = 2, length = 250 }

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aliases = ["T10x2", "T10 lead screw 250", "Tr10x2 lead screw", "T10 2mm lead 250mm", "screw=T10; pitch/lead=2 mm; length=250 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L300"

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title = "Tr10 × 2, 300 mm"

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params = { size = "Tr10", lead = 2, length = 300 }

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aliases = ["T10x2", "T10 lead screw 300", "Tr10x2 lead screw", "T10 2mm lead 300mm", "screw=T10; pitch/lead=2 mm; length=300 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L350"

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title = "Tr10 × 2, 350 mm"

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params = { size = "Tr10", lead = 2, length = 350 }

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aliases = ["T10x2", "T10 lead screw 350", "Tr10x2 lead screw", "T10 2mm lead 350mm", "screw=T10; pitch/lead=2 mm; length=350 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L400"

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title = "Tr10 × 2, 400 mm"

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params = { size = "Tr10", lead = 2, length = 400 }

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aliases = ["T10x2", "T10 lead screw 400", "Tr10x2 lead screw", "T10 2mm lead 400mm", "screw=T10; pitch/lead=2 mm; length=400 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L450"

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title = "Tr10 × 2, 450 mm"

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params = { size = "Tr10", lead = 2, length = 450 }

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aliases = ["T10x2", "T10 lead screw 450", "Tr10x2 lead screw", "T10 2mm lead 450mm", "screw=T10; pitch/lead=2 mm; length=450 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L500"

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title = "Tr10 × 2, 500 mm"

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params = { size = "Tr10", lead = 2, length = 500 }

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aliases = ["T10x2", "T10 lead screw 500", "Tr10x2 lead screw", "T10 2mm lead 500mm", "screw=T10; pitch/lead=2 mm; length=500 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L600"

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title = "Tr10 × 2, 600 mm"

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params = { size = "Tr10", lead = 2, length = 600 }

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aliases = ["T10x2", "T10 lead screw 600", "Tr10x2 lead screw", "T10 2mm lead 600mm", "screw=T10; pitch/lead=2 mm; length=600 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L750"

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title = "Tr10 × 2, 750 mm"

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params = { size = "Tr10", lead = 2, length = 750 }

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aliases = ["T10x2", "T10 lead screw 750", "Tr10x2 lead screw", "T10 2mm lead 750mm", "screw=T10; pitch/lead=2 mm; length=750 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x2-L1000"

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title = "Tr10 × 2, 1000 mm"

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params = { size = "Tr10", lead = 2, length = 1000 }

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aliases = ["T10x2", "T10 lead screw 1000", "Tr10x2 lead screw", "T10 2mm lead 1000mm", "screw=T10; pitch/lead=2 mm; length=1000 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x4-L100"

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title = "Tr10 × 4, 100 mm"

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params = { size = "Tr10", lead = 4, length = 100 }

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aliases = ["T10x4", "T10 lead screw 100", "Tr10x4 lead screw", "T10 4mm lead 100mm", "screw=T10; pitch/lead=4 mm; length=100 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x4-L150"

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title = "Tr10 × 4, 150 mm"

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params = { size = "Tr10", lead = 4, length = 150 }

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aliases = ["T10x4", "T10 lead screw 150", "Tr10x4 lead screw", "T10 4mm lead 150mm", "screw=T10; pitch/lead=4 mm; length=150 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x4-L200"

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title = "Tr10 × 4, 200 mm"

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params = { size = "Tr10", lead = 4, length = 200 }

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aliases = ["T10x4", "T10 lead screw 200", "Tr10x4 lead screw", "T10 4mm lead 200mm", "screw=T10; pitch/lead=4 mm; length=200 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x4-L250"

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title = "Tr10 × 4, 250 mm"

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params = { size = "Tr10", lead = 4, length = 250 }

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aliases = ["T10x4", "T10 lead screw 250", "Tr10x4 lead screw", "T10 4mm lead 250mm", "screw=T10; pitch/lead=4 mm; length=250 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x4-L300"

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title = "Tr10 × 4, 300 mm"

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params = { size = "Tr10", lead = 4, length = 300 }

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aliases = ["T10x4", "T10 lead screw 300", "Tr10x4 lead screw", "T10 4mm lead 300mm", "screw=T10; pitch/lead=4 mm; length=300 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x4-L350"

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title = "Tr10 × 4, 350 mm"

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params = { size = "Tr10", lead = 4, length = 350 }

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aliases = ["T10x4", "T10 lead screw 350", "Tr10x4 lead screw", "T10 4mm lead 350mm", "screw=T10; pitch/lead=4 mm; length=350 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x4-L400"

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title = "Tr10 × 4, 400 mm"

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params = { size = "Tr10", lead = 4, length = 400 }

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aliases = ["T10x4", "T10 lead screw 400", "Tr10x4 lead screw", "T10 4mm lead 400mm", "screw=T10; pitch/lead=4 mm; length=400 mm; simplified thread envelope"]

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standard = "ISO 2904"

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[[presets]]

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id = "Tr10x4-L450"

390

title = "Tr10 × 4, 450 mm"

391

params = { size = "Tr10", lead = 4, length = 450 }

392

aliases = ["T10x4", "T10 lead screw 450", "Tr10x4 lead screw", "T10 4mm lead 450mm", "screw=T10; pitch/lead=4 mm; length=450 mm; simplified thread envelope"]

393

standard = "ISO 2904"

394

395

[[presets]]

396

id = "Tr10x4-L500"

397

title = "Tr10 × 4, 500 mm"

398

params = { size = "Tr10", lead = 4, length = 500 }

399

aliases = ["T10x4", "T10 lead screw 500", "Tr10x4 lead screw", "T10 4mm lead 500mm", "screw=T10; pitch/lead=4 mm; length=500 mm; simplified thread envelope"]

400

standard = "ISO 2904"

401

402

[[presets]]

403

id = "Tr10x4-L600"

404

title = "Tr10 × 4, 600 mm"

405

params = { size = "Tr10", lead = 4, length = 600 }

406

aliases = ["T10x4", "T10 lead screw 600", "Tr10x4 lead screw", "T10 4mm lead 600mm", "screw=T10; pitch/lead=4 mm; length=600 mm; simplified thread envelope"]

407

standard = "ISO 2904"

408

409

[[presets]]

410

id = "Tr10x4-L750"

411

title = "Tr10 × 4, 750 mm"

412

params = { size = "Tr10", lead = 4, length = 750 }

413

aliases = ["T10x4", "T10 lead screw 750", "Tr10x4 lead screw", "T10 4mm lead 750mm", "screw=T10; pitch/lead=4 mm; length=750 mm; simplified thread envelope"]

414

standard = "ISO 2904"

415

416

[[presets]]

417

id = "Tr10x4-L1000"

418

title = "Tr10 × 4, 1000 mm"

419

params = { size = "Tr10", lead = 4, length = 1000 }

420

aliases = ["T10x4", "T10 lead screw 1000", "Tr10x4 lead screw", "T10 4mm lead 1000mm", "screw=T10; pitch/lead=4 mm; length=1000 mm; simplified thread envelope"]

421

standard = "ISO 2904"

422

423

[[presets]]

424

id = "Tr12x3-L100"

425

title = "Tr12 × 3, 100 mm"

426

params = { size = "Tr12", lead = 3, length = 100 }

427

aliases = ["T12x3", "T12 lead screw 100", "Tr12x3 lead screw", "T12 3mm lead 100mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=100 mm; simplified thread envelope"]

428

standard = "ISO 2904"

429

430

[[presets]]

431

id = "Tr12x3-L150"

432

title = "Tr12 × 3, 150 mm"

433

params = { size = "Tr12", lead = 3, length = 150 }

434

aliases = ["T12x3", "T12 lead screw 150", "Tr12x3 lead screw", "T12 3mm lead 150mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=150 mm; simplified thread envelope"]

435

standard = "ISO 2904"

436

437

[[presets]]

438

id = "Tr12x3-L200"

439

title = "Tr12 × 3, 200 mm"

440

params = { size = "Tr12", lead = 3, length = 200 }

441

aliases = ["T12x3", "T12 lead screw 200", "Tr12x3 lead screw", "T12 3mm lead 200mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=200 mm; simplified thread envelope"]

442

standard = "ISO 2904"

443

444

[[presets]]

445

id = "Tr12x3-L250"

446

title = "Tr12 × 3, 250 mm"

447

params = { size = "Tr12", lead = 3, length = 250 }

448

aliases = ["T12x3", "T12 lead screw 250", "Tr12x3 lead screw", "T12 3mm lead 250mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=250 mm; simplified thread envelope"]

449

standard = "ISO 2904"

450

451

[[presets]]

452

id = "Tr12x3-L300"

453

title = "Tr12 × 3, 300 mm"

454

params = { size = "Tr12", lead = 3, length = 300 }

455

aliases = ["T12x3", "T12 lead screw 300", "Tr12x3 lead screw", "T12 3mm lead 300mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=300 mm; simplified thread envelope"]

456

standard = "ISO 2904"

457

458

[[presets]]

459

id = "Tr12x3-L350"

460

title = "Tr12 × 3, 350 mm"

461

params = { size = "Tr12", lead = 3, length = 350 }

462

aliases = ["T12x3", "T12 lead screw 350", "Tr12x3 lead screw", "T12 3mm lead 350mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=350 mm; simplified thread envelope"]

463

standard = "ISO 2904"

464

465

[[presets]]

466

id = "Tr12x3-L400"

467

title = "Tr12 × 3, 400 mm"

468

params = { size = "Tr12", lead = 3, length = 400 }

469

aliases = ["T12x3", "T12 lead screw 400", "Tr12x3 lead screw", "T12 3mm lead 400mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=400 mm; simplified thread envelope"]

470

standard = "ISO 2904"

471

472

[[presets]]

473

id = "Tr12x3-L450"

474

title = "Tr12 × 3, 450 mm"

475

params = { size = "Tr12", lead = 3, length = 450 }

476

aliases = ["T12x3", "T12 lead screw 450", "Tr12x3 lead screw", "T12 3mm lead 450mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=450 mm; simplified thread envelope"]

477

standard = "ISO 2904"

478

479

[[presets]]

480

id = "Tr12x3-L500"

481

title = "Tr12 × 3, 500 mm"

482

params = { size = "Tr12", lead = 3, length = 500 }

483

aliases = ["T12x3", "T12 lead screw 500", "Tr12x3 lead screw", "T12 3mm lead 500mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=500 mm; simplified thread envelope"]

484

standard = "ISO 2904"

485

486

[[presets]]

487

id = "Tr12x3-L600"

488

title = "Tr12 × 3, 600 mm"

489

params = { size = "Tr12", lead = 3, length = 600 }

490

aliases = ["T12x3", "T12 lead screw 600", "Tr12x3 lead screw", "T12 3mm lead 600mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=600 mm; simplified thread envelope"]

491

standard = "ISO 2904"

492

493

[[presets]]

494

id = "Tr12x3-L750"

495

title = "Tr12 × 3, 750 mm"

496

params = { size = "Tr12", lead = 3, length = 750 }

497

aliases = ["T12x3", "T12 lead screw 750", "Tr12x3 lead screw", "T12 3mm lead 750mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=750 mm; simplified thread envelope"]

498

standard = "ISO 2904"

499

500

[[presets]]

501

id = "Tr12x3-L1000"

502

title = "Tr12 × 3, 1000 mm"

503

params = { size = "Tr12", lead = 3, length = 1000 }

504

aliases = ["T12x3", "T12 lead screw 1000", "Tr12x3 lead screw", "T12 3mm lead 1000mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=1000 mm; simplified thread envelope"]

505

standard = "ISO 2904"

506

507

[[presets]]

508

id = "Tr16x4-L100"

509

title = "Tr16 × 4, 100 mm"

510

params = { size = "Tr16", lead = 4, length = 100 }

511

aliases = ["T16x4", "T16 lead screw 100", "Tr16x4 lead screw", "T16 4mm lead 100mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=100 mm; simplified thread envelope"]

512

standard = "ISO 2904"

513

514

[[presets]]

515

id = "Tr16x4-L150"

516

title = "Tr16 × 4, 150 mm"

517

params = { size = "Tr16", lead = 4, length = 150 }

518

aliases = ["T16x4", "T16 lead screw 150", "Tr16x4 lead screw", "T16 4mm lead 150mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=150 mm; simplified thread envelope"]

519

standard = "ISO 2904"

520

521

[[presets]]

522

id = "Tr16x4-L200"

523

title = "Tr16 × 4, 200 mm"

524

params = { size = "Tr16", lead = 4, length = 200 }

525

aliases = ["T16x4", "T16 lead screw 200", "Tr16x4 lead screw", "T16 4mm lead 200mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=200 mm; simplified thread envelope"]

526

standard = "ISO 2904"

527

528

[[presets]]

529

id = "Tr16x4-L250"

530

title = "Tr16 × 4, 250 mm"

531

params = { size = "Tr16", lead = 4, length = 250 }

532

aliases = ["T16x4", "T16 lead screw 250", "Tr16x4 lead screw", "T16 4mm lead 250mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=250 mm; simplified thread envelope"]

533

standard = "ISO 2904"

534

535

[[presets]]

536

id = "Tr16x4-L300"

537

title = "Tr16 × 4, 300 mm"

538

params = { size = "Tr16", lead = 4, length = 300 }

539

aliases = ["T16x4", "T16 lead screw 300", "Tr16x4 lead screw", "T16 4mm lead 300mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=300 mm; simplified thread envelope"]

540

standard = "ISO 2904"

541

542

[[presets]]

543

id = "Tr16x4-L350"

544

title = "Tr16 × 4, 350 mm"

545

params = { size = "Tr16", lead = 4, length = 350 }

546

aliases = ["T16x4", "T16 lead screw 350", "Tr16x4 lead screw", "T16 4mm lead 350mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=350 mm; simplified thread envelope"]

547

standard = "ISO 2904"

548

549

[[presets]]

550

id = "Tr16x4-L400"

551

title = "Tr16 × 4, 400 mm"

552

params = { size = "Tr16", lead = 4, length = 400 }

553

aliases = ["T16x4", "T16 lead screw 400", "Tr16x4 lead screw", "T16 4mm lead 400mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=400 mm; simplified thread envelope"]

554

standard = "ISO 2904"

555

556

[[presets]]

557

id = "Tr16x4-L450"

558

title = "Tr16 × 4, 450 mm"

559

params = { size = "Tr16", lead = 4, length = 450 }

560

aliases = ["T16x4", "T16 lead screw 450", "Tr16x4 lead screw", "T16 4mm lead 450mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=450 mm; simplified thread envelope"]

561

standard = "ISO 2904"

562

563

[[presets]]

564

id = "Tr16x4-L500"

565

title = "Tr16 × 4, 500 mm"

566

params = { size = "Tr16", lead = 4, length = 500 }

567

aliases = ["T16x4", "T16 lead screw 500", "Tr16x4 lead screw", "T16 4mm lead 500mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=500 mm; simplified thread envelope"]

568

standard = "ISO 2904"

569

570

[[presets]]

571

id = "Tr16x4-L600"

572

title = "Tr16 × 4, 600 mm"

573

params = { size = "Tr16", lead = 4, length = 600 }

574

aliases = ["T16x4", "T16 lead screw 600", "Tr16x4 lead screw", "T16 4mm lead 600mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=600 mm; simplified thread envelope"]

575

standard = "ISO 2904"

576

577

[[presets]]

578

id = "Tr16x4-L750"

579

title = "Tr16 × 4, 750 mm"

580

params = { size = "Tr16", lead = 4, length = 750 }

581

aliases = ["T16x4", "T16 lead screw 750", "Tr16x4 lead screw", "T16 4mm lead 750mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=750 mm; simplified thread envelope"]

582

standard = "ISO 2904"

583

584

[[presets]]

585

id = "Tr16x4-L1000"

586

title = "Tr16 × 4, 1000 mm"

587

params = { size = "Tr16", lead = 4, length = 1000 }

588

aliases = ["T16x4", "T16 lead screw 1000", "Tr16x4 lead screw", "T16 4mm lead 1000mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=1000 mm; simplified thread envelope"]

589

standard = "ISO 2904"

590

# Presets of this part (factory/PRESETS.md). Written by factory/gen.py.

[[presets]]
id = "Tr8x2-L100"
title = "Tr8 × 2, 100 mm"
params = { size = "Tr8", lead = 2, length = 100 }
aliases = ["T8x2", "T8 lead screw 100", "Tr8x2 lead screw", "T8 2mm lead 100mm", "screw=T8; pitch/lead=2 mm; length=100 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x2-L150"
title = "Tr8 × 2, 150 mm"
params = { size = "Tr8", lead = 2, length = 150 }
aliases = ["T8x2", "T8 lead screw 150", "Tr8x2 lead screw", "T8 2mm lead 150mm", "screw=T8; pitch/lead=2 mm; length=150 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x2-L200"
title = "Tr8 × 2, 200 mm"
params = { size = "Tr8", lead = 2, length = 200 }
aliases = ["T8x2", "T8 lead screw 200", "Tr8x2 lead screw", "T8 2mm lead 200mm", "screw=T8; pitch/lead=2 mm; length=200 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x2-L250"
title = "Tr8 × 2, 250 mm"
params = { size = "Tr8", lead = 2, length = 250 }
aliases = ["T8x2", "T8 lead screw 250", "Tr8x2 lead screw", "T8 2mm lead 250mm", "screw=T8; pitch/lead=2 mm; length=250 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x2-L300"
title = "Tr8 × 2, 300 mm"
params = { size = "Tr8", lead = 2, length = 300 }
aliases = ["T8x2", "T8 lead screw 300", "Tr8x2 lead screw", "T8 2mm lead 300mm", "screw=T8; pitch/lead=2 mm; length=300 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x2-L350"
title = "Tr8 × 2, 350 mm"
params = { size = "Tr8", lead = 2, length = 350 }
aliases = ["T8x2", "T8 lead screw 350", "Tr8x2 lead screw", "T8 2mm lead 350mm", "screw=T8; pitch/lead=2 mm; length=350 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x2-L400"
title = "Tr8 × 2, 400 mm"
params = { size = "Tr8", lead = 2, length = 400 }
aliases = ["T8x2", "T8 lead screw 400", "Tr8x2 lead screw", "T8 2mm lead 400mm", "screw=T8; pitch/lead=2 mm; length=400 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x2-L450"
title = "Tr8 × 2, 450 mm"
params = { size = "Tr8", lead = 2, length = 450 }
aliases = ["T8x2", "T8 lead screw 450", "Tr8x2 lead screw", "T8 2mm lead 450mm", "screw=T8; pitch/lead=2 mm; length=450 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x2-L500"
title = "Tr8 × 2, 500 mm"
params = { size = "Tr8", lead = 2, length = 500 }
aliases = ["T8x2", "T8 lead screw 500", "Tr8x2 lead screw", "T8 2mm lead 500mm", "screw=T8; pitch/lead=2 mm; length=500 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x2-L600"
title = "Tr8 × 2, 600 mm"
params = { size = "Tr8", lead = 2, length = 600 }
aliases = ["T8x2", "T8 lead screw 600", "Tr8x2 lead screw", "T8 2mm lead 600mm", "screw=T8; pitch/lead=2 mm; length=600 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x2-L750"
title = "Tr8 × 2, 750 mm"
params = { size = "Tr8", lead = 2, length = 750 }
aliases = ["T8x2", "T8 lead screw 750", "Tr8x2 lead screw", "T8 2mm lead 750mm", "screw=T8; pitch/lead=2 mm; length=750 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x2-L1000"
title = "Tr8 × 2, 1000 mm"
params = { size = "Tr8", lead = 2, length = 1000 }
aliases = ["T8x2", "T8 lead screw 1000", "Tr8x2 lead screw", "T8 2mm lead 1000mm", "screw=T8; pitch/lead=2 mm; length=1000 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L100"
title = "Tr8 × 4, 100 mm"
params = { size = "Tr8", lead = 4, length = 100 }
aliases = ["T8x4", "T8 lead screw 100", "Tr8x4 lead screw", "T8 4mm lead 100mm", "screw=T8; pitch/lead=4 mm; length=100 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L150"
title = "Tr8 × 4, 150 mm"
params = { size = "Tr8", lead = 4, length = 150 }
aliases = ["T8x4", "T8 lead screw 150", "Tr8x4 lead screw", "T8 4mm lead 150mm", "screw=T8; pitch/lead=4 mm; length=150 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L200"
title = "Tr8 × 4, 200 mm"
params = { size = "Tr8", lead = 4, length = 200 }
aliases = ["T8x4", "T8 lead screw 200", "Tr8x4 lead screw", "T8 4mm lead 200mm", "screw=T8; pitch/lead=4 mm; length=200 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L250"
title = "Tr8 × 4, 250 mm"
params = { size = "Tr8", lead = 4, length = 250 }
aliases = ["T8x4", "T8 lead screw 250", "Tr8x4 lead screw", "T8 4mm lead 250mm", "screw=T8; pitch/lead=4 mm; length=250 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L300"
title = "Tr8 × 4, 300 mm"
params = { size = "Tr8", lead = 4, length = 300 }
aliases = ["T8x4", "T8 lead screw 300", "Tr8x4 lead screw", "T8 4mm lead 300mm", "screw=T8; pitch/lead=4 mm; length=300 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L350"
title = "Tr8 × 4, 350 mm"
params = { size = "Tr8", lead = 4, length = 350 }
aliases = ["T8x4", "T8 lead screw 350", "Tr8x4 lead screw", "T8 4mm lead 350mm", "screw=T8; pitch/lead=4 mm; length=350 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L400"
title = "Tr8 × 4, 400 mm"
params = { size = "Tr8", lead = 4, length = 400 }
aliases = ["T8x4", "T8 lead screw 400", "Tr8x4 lead screw", "T8 4mm lead 400mm", "screw=T8; pitch/lead=4 mm; length=400 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L450"
title = "Tr8 × 4, 450 mm"
params = { size = "Tr8", lead = 4, length = 450 }
aliases = ["T8x4", "T8 lead screw 450", "Tr8x4 lead screw", "T8 4mm lead 450mm", "screw=T8; pitch/lead=4 mm; length=450 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L500"
title = "Tr8 × 4, 500 mm"
params = { size = "Tr8", lead = 4, length = 500 }
aliases = ["T8x4", "T8 lead screw 500", "Tr8x4 lead screw", "T8 4mm lead 500mm", "screw=T8; pitch/lead=4 mm; length=500 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L600"
title = "Tr8 × 4, 600 mm"
params = { size = "Tr8", lead = 4, length = 600 }
aliases = ["T8x4", "T8 lead screw 600", "Tr8x4 lead screw", "T8 4mm lead 600mm", "screw=T8; pitch/lead=4 mm; length=600 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L750"
title = "Tr8 × 4, 750 mm"
params = { size = "Tr8", lead = 4, length = 750 }
aliases = ["T8x4", "T8 lead screw 750", "Tr8x4 lead screw", "T8 4mm lead 750mm", "screw=T8; pitch/lead=4 mm; length=750 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x4-L1000"
title = "Tr8 × 4, 1000 mm"
params = { size = "Tr8", lead = 4, length = 1000 }
aliases = ["T8x4", "T8 lead screw 1000", "Tr8x4 lead screw", "T8 4mm lead 1000mm", "screw=T8; pitch/lead=4 mm; length=1000 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L100"
title = "Tr8 × 8, 100 mm"
params = { size = "Tr8", lead = 8, length = 100 }
aliases = ["T8x8", "T8 lead screw 100", "Tr8x8 lead screw", "T8 8mm lead 100mm", "screw=T8; pitch/lead=8 mm; length=100 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L150"
title = "Tr8 × 8, 150 mm"
params = { size = "Tr8", lead = 8, length = 150 }
aliases = ["T8x8", "T8 lead screw 150", "Tr8x8 lead screw", "T8 8mm lead 150mm", "screw=T8; pitch/lead=8 mm; length=150 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L200"
title = "Tr8 × 8, 200 mm"
params = { size = "Tr8", lead = 8, length = 200 }
aliases = ["T8x8", "T8 lead screw 200", "Tr8x8 lead screw", "T8 8mm lead 200mm", "screw=T8; pitch/lead=8 mm; length=200 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L250"
title = "Tr8 × 8, 250 mm"
params = { size = "Tr8", lead = 8, length = 250 }
aliases = ["T8x8", "T8 lead screw 250", "Tr8x8 lead screw", "T8 8mm lead 250mm", "screw=T8; pitch/lead=8 mm; length=250 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L300"
title = "Tr8 × 8, 300 mm"
params = { size = "Tr8", lead = 8, length = 300 }
aliases = ["T8x8", "T8 lead screw 300", "Tr8x8 lead screw", "T8 8mm lead 300mm", "screw=T8; pitch/lead=8 mm; length=300 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L350"
title = "Tr8 × 8, 350 mm"
params = { size = "Tr8", lead = 8, length = 350 }
aliases = ["T8x8", "T8 lead screw 350", "Tr8x8 lead screw", "T8 8mm lead 350mm", "screw=T8; pitch/lead=8 mm; length=350 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L400"
title = "Tr8 × 8, 400 mm"
params = { size = "Tr8", lead = 8, length = 400 }
aliases = ["T8x8", "T8 lead screw 400", "Tr8x8 lead screw", "T8 8mm lead 400mm", "screw=T8; pitch/lead=8 mm; length=400 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L450"
title = "Tr8 × 8, 450 mm"
params = { size = "Tr8", lead = 8, length = 450 }
aliases = ["T8x8", "T8 lead screw 450", "Tr8x8 lead screw", "T8 8mm lead 450mm", "screw=T8; pitch/lead=8 mm; length=450 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L500"
title = "Tr8 × 8, 500 mm"
params = { size = "Tr8", lead = 8, length = 500 }
aliases = ["T8x8", "T8 lead screw 500", "Tr8x8 lead screw", "T8 8mm lead 500mm", "screw=T8; pitch/lead=8 mm; length=500 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L600"
title = "Tr8 × 8, 600 mm"
params = { size = "Tr8", lead = 8, length = 600 }
aliases = ["T8x8", "T8 lead screw 600", "Tr8x8 lead screw", "T8 8mm lead 600mm", "screw=T8; pitch/lead=8 mm; length=600 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L750"
title = "Tr8 × 8, 750 mm"
params = { size = "Tr8", lead = 8, length = 750 }
aliases = ["T8x8", "T8 lead screw 750", "Tr8x8 lead screw", "T8 8mm lead 750mm", "screw=T8; pitch/lead=8 mm; length=750 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr8x8-L1000"
title = "Tr8 × 8, 1000 mm"
params = { size = "Tr8", lead = 8, length = 1000 }
aliases = ["T8x8", "T8 lead screw 1000", "Tr8x8 lead screw", "T8 8mm lead 1000mm", "screw=T8; pitch/lead=8 mm; length=1000 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L100"
title = "Tr10 × 2, 100 mm"
params = { size = "Tr10", lead = 2, length = 100 }
aliases = ["T10x2", "T10 lead screw 100", "Tr10x2 lead screw", "T10 2mm lead 100mm", "screw=T10; pitch/lead=2 mm; length=100 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L150"
title = "Tr10 × 2, 150 mm"
params = { size = "Tr10", lead = 2, length = 150 }
aliases = ["T10x2", "T10 lead screw 150", "Tr10x2 lead screw", "T10 2mm lead 150mm", "screw=T10; pitch/lead=2 mm; length=150 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L200"
title = "Tr10 × 2, 200 mm"
params = { size = "Tr10", lead = 2, length = 200 }
aliases = ["T10x2", "T10 lead screw 200", "Tr10x2 lead screw", "T10 2mm lead 200mm", "screw=T10; pitch/lead=2 mm; length=200 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L250"
title = "Tr10 × 2, 250 mm"
params = { size = "Tr10", lead = 2, length = 250 }
aliases = ["T10x2", "T10 lead screw 250", "Tr10x2 lead screw", "T10 2mm lead 250mm", "screw=T10; pitch/lead=2 mm; length=250 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L300"
title = "Tr10 × 2, 300 mm"
params = { size = "Tr10", lead = 2, length = 300 }
aliases = ["T10x2", "T10 lead screw 300", "Tr10x2 lead screw", "T10 2mm lead 300mm", "screw=T10; pitch/lead=2 mm; length=300 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L350"
title = "Tr10 × 2, 350 mm"
params = { size = "Tr10", lead = 2, length = 350 }
aliases = ["T10x2", "T10 lead screw 350", "Tr10x2 lead screw", "T10 2mm lead 350mm", "screw=T10; pitch/lead=2 mm; length=350 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L400"
title = "Tr10 × 2, 400 mm"
params = { size = "Tr10", lead = 2, length = 400 }
aliases = ["T10x2", "T10 lead screw 400", "Tr10x2 lead screw", "T10 2mm lead 400mm", "screw=T10; pitch/lead=2 mm; length=400 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L450"
title = "Tr10 × 2, 450 mm"
params = { size = "Tr10", lead = 2, length = 450 }
aliases = ["T10x2", "T10 lead screw 450", "Tr10x2 lead screw", "T10 2mm lead 450mm", "screw=T10; pitch/lead=2 mm; length=450 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L500"
title = "Tr10 × 2, 500 mm"
params = { size = "Tr10", lead = 2, length = 500 }
aliases = ["T10x2", "T10 lead screw 500", "Tr10x2 lead screw", "T10 2mm lead 500mm", "screw=T10; pitch/lead=2 mm; length=500 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L600"
title = "Tr10 × 2, 600 mm"
params = { size = "Tr10", lead = 2, length = 600 }
aliases = ["T10x2", "T10 lead screw 600", "Tr10x2 lead screw", "T10 2mm lead 600mm", "screw=T10; pitch/lead=2 mm; length=600 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L750"
title = "Tr10 × 2, 750 mm"
params = { size = "Tr10", lead = 2, length = 750 }
aliases = ["T10x2", "T10 lead screw 750", "Tr10x2 lead screw", "T10 2mm lead 750mm", "screw=T10; pitch/lead=2 mm; length=750 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x2-L1000"
title = "Tr10 × 2, 1000 mm"
params = { size = "Tr10", lead = 2, length = 1000 }
aliases = ["T10x2", "T10 lead screw 1000", "Tr10x2 lead screw", "T10 2mm lead 1000mm", "screw=T10; pitch/lead=2 mm; length=1000 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L100"
title = "Tr10 × 4, 100 mm"
params = { size = "Tr10", lead = 4, length = 100 }
aliases = ["T10x4", "T10 lead screw 100", "Tr10x4 lead screw", "T10 4mm lead 100mm", "screw=T10; pitch/lead=4 mm; length=100 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L150"
title = "Tr10 × 4, 150 mm"
params = { size = "Tr10", lead = 4, length = 150 }
aliases = ["T10x4", "T10 lead screw 150", "Tr10x4 lead screw", "T10 4mm lead 150mm", "screw=T10; pitch/lead=4 mm; length=150 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L200"
title = "Tr10 × 4, 200 mm"
params = { size = "Tr10", lead = 4, length = 200 }
aliases = ["T10x4", "T10 lead screw 200", "Tr10x4 lead screw", "T10 4mm lead 200mm", "screw=T10; pitch/lead=4 mm; length=200 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L250"
title = "Tr10 × 4, 250 mm"
params = { size = "Tr10", lead = 4, length = 250 }
aliases = ["T10x4", "T10 lead screw 250", "Tr10x4 lead screw", "T10 4mm lead 250mm", "screw=T10; pitch/lead=4 mm; length=250 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L300"
title = "Tr10 × 4, 300 mm"
params = { size = "Tr10", lead = 4, length = 300 }
aliases = ["T10x4", "T10 lead screw 300", "Tr10x4 lead screw", "T10 4mm lead 300mm", "screw=T10; pitch/lead=4 mm; length=300 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L350"
title = "Tr10 × 4, 350 mm"
params = { size = "Tr10", lead = 4, length = 350 }
aliases = ["T10x4", "T10 lead screw 350", "Tr10x4 lead screw", "T10 4mm lead 350mm", "screw=T10; pitch/lead=4 mm; length=350 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L400"
title = "Tr10 × 4, 400 mm"
params = { size = "Tr10", lead = 4, length = 400 }
aliases = ["T10x4", "T10 lead screw 400", "Tr10x4 lead screw", "T10 4mm lead 400mm", "screw=T10; pitch/lead=4 mm; length=400 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L450"
title = "Tr10 × 4, 450 mm"
params = { size = "Tr10", lead = 4, length = 450 }
aliases = ["T10x4", "T10 lead screw 450", "Tr10x4 lead screw", "T10 4mm lead 450mm", "screw=T10; pitch/lead=4 mm; length=450 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L500"
title = "Tr10 × 4, 500 mm"
params = { size = "Tr10", lead = 4, length = 500 }
aliases = ["T10x4", "T10 lead screw 500", "Tr10x4 lead screw", "T10 4mm lead 500mm", "screw=T10; pitch/lead=4 mm; length=500 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L600"
title = "Tr10 × 4, 600 mm"
params = { size = "Tr10", lead = 4, length = 600 }
aliases = ["T10x4", "T10 lead screw 600", "Tr10x4 lead screw", "T10 4mm lead 600mm", "screw=T10; pitch/lead=4 mm; length=600 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L750"
title = "Tr10 × 4, 750 mm"
params = { size = "Tr10", lead = 4, length = 750 }
aliases = ["T10x4", "T10 lead screw 750", "Tr10x4 lead screw", "T10 4mm lead 750mm", "screw=T10; pitch/lead=4 mm; length=750 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr10x4-L1000"
title = "Tr10 × 4, 1000 mm"
params = { size = "Tr10", lead = 4, length = 1000 }
aliases = ["T10x4", "T10 lead screw 1000", "Tr10x4 lead screw", "T10 4mm lead 1000mm", "screw=T10; pitch/lead=4 mm; length=1000 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L100"
title = "Tr12 × 3, 100 mm"
params = { size = "Tr12", lead = 3, length = 100 }
aliases = ["T12x3", "T12 lead screw 100", "Tr12x3 lead screw", "T12 3mm lead 100mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=100 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L150"
title = "Tr12 × 3, 150 mm"
params = { size = "Tr12", lead = 3, length = 150 }
aliases = ["T12x3", "T12 lead screw 150", "Tr12x3 lead screw", "T12 3mm lead 150mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=150 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L200"
title = "Tr12 × 3, 200 mm"
params = { size = "Tr12", lead = 3, length = 200 }
aliases = ["T12x3", "T12 lead screw 200", "Tr12x3 lead screw", "T12 3mm lead 200mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=200 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L250"
title = "Tr12 × 3, 250 mm"
params = { size = "Tr12", lead = 3, length = 250 }
aliases = ["T12x3", "T12 lead screw 250", "Tr12x3 lead screw", "T12 3mm lead 250mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=250 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L300"
title = "Tr12 × 3, 300 mm"
params = { size = "Tr12", lead = 3, length = 300 }
aliases = ["T12x3", "T12 lead screw 300", "Tr12x3 lead screw", "T12 3mm lead 300mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=300 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L350"
title = "Tr12 × 3, 350 mm"
params = { size = "Tr12", lead = 3, length = 350 }
aliases = ["T12x3", "T12 lead screw 350", "Tr12x3 lead screw", "T12 3mm lead 350mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=350 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L400"
title = "Tr12 × 3, 400 mm"
params = { size = "Tr12", lead = 3, length = 400 }
aliases = ["T12x3", "T12 lead screw 400", "Tr12x3 lead screw", "T12 3mm lead 400mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=400 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L450"
title = "Tr12 × 3, 450 mm"
params = { size = "Tr12", lead = 3, length = 450 }
aliases = ["T12x3", "T12 lead screw 450", "Tr12x3 lead screw", "T12 3mm lead 450mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=450 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L500"
title = "Tr12 × 3, 500 mm"
params = { size = "Tr12", lead = 3, length = 500 }
aliases = ["T12x3", "T12 lead screw 500", "Tr12x3 lead screw", "T12 3mm lead 500mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=500 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L600"
title = "Tr12 × 3, 600 mm"
params = { size = "Tr12", lead = 3, length = 600 }
aliases = ["T12x3", "T12 lead screw 600", "Tr12x3 lead screw", "T12 3mm lead 600mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=600 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L750"
title = "Tr12 × 3, 750 mm"
params = { size = "Tr12", lead = 3, length = 750 }
aliases = ["T12x3", "T12 lead screw 750", "Tr12x3 lead screw", "T12 3mm lead 750mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=750 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr12x3-L1000"
title = "Tr12 × 3, 1000 mm"
params = { size = "Tr12", lead = 3, length = 1000 }
aliases = ["T12x3", "T12 lead screw 1000", "Tr12x3 lead screw", "T12 3mm lead 1000mm", "TR12x3", "screw=TR12; pitch/lead=3 mm; length=1000 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L100"
title = "Tr16 × 4, 100 mm"
params = { size = "Tr16", lead = 4, length = 100 }
aliases = ["T16x4", "T16 lead screw 100", "Tr16x4 lead screw", "T16 4mm lead 100mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=100 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L150"
title = "Tr16 × 4, 150 mm"
params = { size = "Tr16", lead = 4, length = 150 }
aliases = ["T16x4", "T16 lead screw 150", "Tr16x4 lead screw", "T16 4mm lead 150mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=150 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L200"
title = "Tr16 × 4, 200 mm"
params = { size = "Tr16", lead = 4, length = 200 }
aliases = ["T16x4", "T16 lead screw 200", "Tr16x4 lead screw", "T16 4mm lead 200mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=200 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L250"
title = "Tr16 × 4, 250 mm"
params = { size = "Tr16", lead = 4, length = 250 }
aliases = ["T16x4", "T16 lead screw 250", "Tr16x4 lead screw", "T16 4mm lead 250mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=250 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L300"
title = "Tr16 × 4, 300 mm"
params = { size = "Tr16", lead = 4, length = 300 }
aliases = ["T16x4", "T16 lead screw 300", "Tr16x4 lead screw", "T16 4mm lead 300mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=300 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L350"
title = "Tr16 × 4, 350 mm"
params = { size = "Tr16", lead = 4, length = 350 }
aliases = ["T16x4", "T16 lead screw 350", "Tr16x4 lead screw", "T16 4mm lead 350mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=350 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L400"
title = "Tr16 × 4, 400 mm"
params = { size = "Tr16", lead = 4, length = 400 }
aliases = ["T16x4", "T16 lead screw 400", "Tr16x4 lead screw", "T16 4mm lead 400mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=400 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L450"
title = "Tr16 × 4, 450 mm"
params = { size = "Tr16", lead = 4, length = 450 }
aliases = ["T16x4", "T16 lead screw 450", "Tr16x4 lead screw", "T16 4mm lead 450mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=450 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L500"
title = "Tr16 × 4, 500 mm"
params = { size = "Tr16", lead = 4, length = 500 }
aliases = ["T16x4", "T16 lead screw 500", "Tr16x4 lead screw", "T16 4mm lead 500mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=500 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L600"
title = "Tr16 × 4, 600 mm"
params = { size = "Tr16", lead = 4, length = 600 }
aliases = ["T16x4", "T16 lead screw 600", "Tr16x4 lead screw", "T16 4mm lead 600mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=600 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L750"
title = "Tr16 × 4, 750 mm"
params = { size = "Tr16", lead = 4, length = 750 }
aliases = ["T16x4", "T16 lead screw 750", "Tr16x4 lead screw", "T16 4mm lead 750mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=750 mm; simplified thread envelope"]
standard = "ISO 2904"

[[presets]]
id = "Tr16x4-L1000"
title = "Tr16 × 4, 1000 mm"
params = { size = "Tr16", lead = 4, length = 1000 }
aliases = ["T16x4", "T16 lead screw 1000", "Tr16x4 lead screw", "T16 4mm lead 1000mm", "TR16x4", "screw=TR16; pitch/lead=4 mm; length=1000 mm; simplified thread envelope"]
standard = "ISO 2904"

README.md 21 lines · Markdown

Download

Trapezoidal lead screw

A lead screw as a plain envelope at its major diameter, axis along Z, centred on the origin. The thread is not modelled, as in the library's threaded rods.

Source

ISO 2904:2020, ISO metric trapezoidal screw threads, basic dimensions, Table 1, official preview https://cdn.standards.iteh.ai/samples/78729/7d158726108b478c889fa887d460ba78/ISO-2904-2020.pdf:

Size	d	P	Pitch diameter d2	Minor diameter d3
Tr8 × 1.5	8	1.5	7.25	6.2
Tr10 × 2	10	2	9	7.5
Tr12 × 3	12	3	10.5	8.5
Tr16 × 4	16	4	14	11.5

Only d shapes this model. The T8 × 2, 4 and 8 and T10 × 4 screws are commercial multi-start designations that ISO 2904 doesn't tabulate: for those, d is the designation's nominal diameter. Lengths and leads come from the step.parts catalogue metadata (MIT, library/NOTICE.md).

# Trapezoidal lead screw

A lead screw as a plain envelope at its major diameter, axis along Z, centred on the origin. The thread is not modelled,
as in the library's threaded rods.

## Source

ISO 2904:2020, *ISO metric trapezoidal screw threads, basic dimensions*, Table 1, official preview
<https://cdn.standards.iteh.ai/samples/78729/7d158726108b478c889fa887d460ba78/ISO-2904-2020.pdf>:

| Size | d | P | Pitch diameter d2 | Minor diameter d3 |
|---|---|---|---|---|
| Tr8 × 1.5 | 8 | 1.5 | 7.25 | 6.2 |
| Tr10 × 2 | 10 | 2 | 9 | 7.5 |
| Tr12 × 3 | 12 | 3 | 10.5 | 8.5 |
| Tr16 × 4 | 16 | 4 | 14 | 11.5 |

Only d shapes this model. The T8 × 2, 4 and 8 and T10 × 4 screws are commercial multi-start designations that ISO 2904
doesn't tabulate: for those, d is the designation's nominal diameter. Lengths and leads come from the step.parts
catalogue metadata (MIT, `library/NOTICE.md`).

Use this part

STEVE

Open in STEVE

Open it in STEVE The STEVE runtime runs in STEVE: open the part there, or download the code and bundle.

Get the code

curl -o part.py "https://pythonparts.org/p/steve/lead-screw/v/1.0.0/raw/part.py"

Raw files, bundle and API

curl "https://pythonparts.org/api/v1/parts/steve/lead-screw/1.0.0"

The version's JSON (parameters, presets, files); add /build?name=value for a build at other values.

About this part

steve72 parts

Profile

Steel (generic)Carbon & alloy steels · Custom finish · 7.9 g/cm³

Mass: 119 g

At the parameters shown in the viewer.

License: MIT

Permissive: use, change and sell it; keep the copyright notice.

Runtime: STEVE
Requirements: None stated in the code
Built with: CadQuery 2.9.0.dev0
Published: Nov 4, 2026
Downloads: 0
Builds: 0
Stars: 0
Bundle: 31282e8ae568…

#lead-screw #trapezoidal #tr8 #motion #metric

Checks

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Request a removal A copyright notice, or a trademark, confidential design, safety, malicious code or other problem. Report an illegal or prohibited item

Trapezoidal lead screw (T8, Tr10, Tr12, Tr16) as a plain envelope at the major diameter, for assemblies: axis along Z, centred on the origin. The thread is not modelled, as in the library's threaded rods. See the README.

Trapezoidal lead screw

A lead screw as a plain envelope at its major diameter, axis along Z, centred on the origin. The thread is not modelled, as in the library's threaded rods.

Source

ISO 2904:2020, ISO metric trapezoidal screw threads, basic dimensions, Table 1, official preview https://cdn.standards.iteh.ai/samples/78729/7d158726108b478c889fa887d460ba78/ISO-2904-2020.pdf:

Size	d	P	Pitch diameter d2	Minor diameter d3
Tr8 × 1.5	8	1.5	7.25	6.2
Tr10 × 2	10	2	9	7.5
Tr12 × 3	12	3	10.5	8.5
Tr16 × 4	16	4	14	11.5

1.0.0 Latest Nov 4, 2026 · 2 hours ago

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Source

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