steve/low-head-socket-cap-screw

Low head socket cap screw, DIN 7984, M3 to M12, any length, with catalogue sizes as presets.

v1.0.0 Latest STEVE MIT 0

Open in STEVE

Isometric

Parameters

Preset60 sizes

Thread size7 options

Length2–200 mm

Nominal length l, from under the head to the end of the shank.

Material3 options

steel: property class 8.8, black oxide; stainless-a2 / stainless-a4: ISO 3506-1 A2 / A4.

Defaults built

part.py 49 lines · Python · STEVE runtime · checked

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"""Hexagon socket head cap screw with low head, DIN 7984, M3 to M12, any length.

Envelope model for assemblies: cylindrical low head (diameter dk max, height k max), hexagon socket (key size s,

depth t min) and a plain shank at the nominal thread diameter d (the thread is not modelled).

The head's bearing face is on the XY plane at the origin, the head above it, the shank along -Z; `length` is the

nominal length l, measured from under the head.

"""

from steve import Model

size = "M5" # Thread size

length = 12 # mm Nominal length (under the head)

material = "steel" # Material

# DIN 7984:2009-06, Tabelle 1, pp. 6-7 (https://tdm-neva.ru/upload/screws/din-7984.pdf; also

# https://fasten.it/en/Norms/Norm/DIN%207984). size: (thread d, head diameter dk max, head height k max, hexagon socket s,

# socket depth t min)

DIMENSIONS = {

"M3": (3.0, 5.5, 2.0, 2.0, 1.38),

"M4": (4.0, 7.0, 2.8, 2.5, 2.18),

"M5": (5.0, 8.5, 3.5, 3.0, 2.58),

"M6": (6.0, 10.0, 4.0, 4.0, 2.88),

"M8": (8.0, 13.0, 5.0, 5.0, 3.65),

"M10": (10.0, 16.0, 6.0, 7.0, 4.35),

"M12": (12.0, 18.0, 7.0, 8.0, 4.85),

}

# material choice: (STEVE material library id, appearance colour)

MATERIALS = {

"steel": ("steel-generic", "#2b2d30"), # property class 8.8, black oxide finish

"stainless-a2": ("stainless-304", "#c9ccd0"), # ISO 3506-1 A2-70

"stainless-a4": ("stainless-316", "#c9ccd0"), # ISO 3506-1 A4-70

}

d, dk, k, s, t = DIMENSIONS[size]

material_id, colour = MATERIALS[material]

model = Model()

with model.sketch("head_sketch", on="XY", name="Head") as sk:

sk.circle("head_circle", (0, 0), dk / 2)

model.extrude("head", "head_sketch", distance=k, name="Head")

with model.sketch("shank_sketch", on="XY", name="Shank") as sk:

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

model.extrude("shank", "shank_sketch", distance=-length, name="Shank")

model.plane("head_top", on="XY", offset=k, name="Head top")

with model.sketch("socket_sketch", on="head_top", name="Hexagon socket") as sk:

sk.polygon("hex", (0, 0), s / 2, 6, inscribed=False)

model.extrude("socket", "socket_sketch", distance=-t, op="cut", name="Socket")

model.material(material_id, color=colour)

result = model.result()

"""Hexagon socket head cap screw with low head, DIN 7984, M3 to M12, any length.

Envelope model for assemblies: cylindrical low head (diameter dk max, height k max), hexagon socket (key size s,
depth t min) and a plain shank at the nominal thread diameter d (the thread is not modelled).
The head's bearing face is on the XY plane at the origin, the head above it, the shank along -Z; `length` is the
nominal length l, measured from under the head.
"""
from steve import Model

size = "M5"  # Thread size
length = 12  # mm Nominal length (under the head)
material = "steel"  # Material

# DIN 7984:2009-06, Tabelle 1, pp. 6-7 (https://tdm-neva.ru/upload/screws/din-7984.pdf; also
# https://fasten.it/en/Norms/Norm/DIN%207984). size: (thread d, head diameter dk max, head height k max, hexagon socket s,
# socket depth t min)
DIMENSIONS = {
    "M3": (3.0, 5.5, 2.0, 2.0, 1.38),
    "M4": (4.0, 7.0, 2.8, 2.5, 2.18),
    "M5": (5.0, 8.5, 3.5, 3.0, 2.58),
    "M6": (6.0, 10.0, 4.0, 4.0, 2.88),
    "M8": (8.0, 13.0, 5.0, 5.0, 3.65),
    "M10": (10.0, 16.0, 6.0, 7.0, 4.35),
    "M12": (12.0, 18.0, 7.0, 8.0, 4.85),
}
# material choice: (STEVE material library id, appearance colour)
MATERIALS = {
    "steel": ("steel-generic", "#2b2d30"),        # property class 8.8, black oxide finish
    "stainless-a2": ("stainless-304", "#c9ccd0"),  # ISO 3506-1 A2-70
    "stainless-a4": ("stainless-316", "#c9ccd0"),  # ISO 3506-1 A4-70
}

d, dk, k, s, t = DIMENSIONS[size]
material_id, colour = MATERIALS[material]

model = Model()
with model.sketch("head_sketch", on="XY", name="Head") as sk:
    sk.circle("head_circle", (0, 0), dk / 2)
model.extrude("head", "head_sketch", distance=k, name="Head")
with model.sketch("shank_sketch", on="XY", name="Shank") as sk:
    sk.circle("shank_circle", (0, 0), d / 2)
model.extrude("shank", "shank_sketch", distance=-length, name="Shank")
model.plane("head_top", on="XY", offset=k, name="Head top")
with model.sketch("socket_sketch", on="head_top", name="Hexagon socket") as sk:
    sk.polygon("hex", (0, 0), s / 2, 6, inscribed=False)
model.extrude("socket", "socket_sketch", distance=-t, op="cut", name="Socket")
model.material(material_id, color=colour)
result = model.result()

pypart.toml 36 lines · TOML

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name = "steve/low-head-socket-cap-screw"

version = "1.0.0"

runtime = "steve"

license = "MIT"

summary = "Low head socket cap screw, DIN 7984, M3 to M12, any length, with catalogue sizes as presets."

description = """DIN 7984 hexagon socket head cap screw with low head. Envelope geometry for assemblies: low \

cylindrical head (dk max, k max), hexagon socket (s, t min) and a plain shank at the nominal thread diameter; the \

thread itself is not modelled.

The head's bearing face is on the XY plane at the origin and the shank points along -Z; `length` is the nominal \

length under the head. Dimensions from DIN 7984:2009-06 Table 1 (see the README)."""

tags = ["fastener", "screw", "socket-head", "low-head", "din-7984", "metric"]

[parameters.size]

type = "choice"

default = "M5"

choices = ["M3", "M4", "M5", "M6", "M8", "M10", "M12"]

label = "Thread size"

[parameters.length]

type = "number"

default = 12

min = 2

max = 200

step = 1

unit = "mm"

label = "Length"

description = "Nominal length l, from under the head to the end of the shank."

[parameters.material]

type = "choice"

default = "steel"

choices = ["steel", "stainless-a2", "stainless-a4"]

label = "Material"

description = "steel: property class 8.8, black oxide; stainless-a2 / stainless-a4: ISO 3506-1 A2 / A4."

name = "steve/low-head-socket-cap-screw"
version = "1.0.0"
runtime = "steve"
license = "MIT"
summary = "Low head socket cap screw, DIN 7984, M3 to M12, any length, with catalogue sizes as presets."
description = """DIN 7984 hexagon socket head cap screw with low head. Envelope geometry for assemblies: low \
cylindrical head (dk max, k max), hexagon socket (s, t min) and a plain shank at the nominal thread diameter; the \
thread itself is not modelled.

The head's bearing face is on the XY plane at the origin and the shank points along -Z; `length` is the nominal \
length under the head. Dimensions from DIN 7984:2009-06 Table 1 (see the README)."""
tags = ["fastener", "screw", "socket-head", "low-head", "din-7984", "metric"]

[parameters.size]
type = "choice"
default = "M5"
choices = ["M3", "M4", "M5", "M6", "M8", "M10", "M12"]
label = "Thread size"

[parameters.length]
type = "number"
default = 12
min = 2
max = 200
step = 1
unit = "mm"
label = "Length"
description = "Nominal length l, from under the head to the end of the shank."

[parameters.material]
type = "choice"
default = "steel"
choices = ["steel", "stainless-a2", "stainless-a4"]
label = "Material"
description = "steel: property class 8.8, black oxide; stainless-a2 / stainless-a4: ISO 3506-1 A2 / A4."

presets.toml 422 lines · TOML

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

[[presets]]

id = "M3x4"

title = "M3 × 4"

params = { size = "M3", length = 4 }

aliases = ["DIN 7984 M3x4", "low head cap screw M3x4", "M3 x 4 mm"]

standard = "DIN 7984"

[[presets]]

id = "M3x5"

title = "M3 × 5"

params = { size = "M3", length = 5 }

aliases = ["DIN 7984 M3x5", "low head cap screw M3x5", "M3 x 5 mm"]

standard = "DIN 7984"

[[presets]]

id = "M3x6"

title = "M3 × 6"

params = { size = "M3", length = 6 }

aliases = ["DIN 7984 M3x6", "low head cap screw M3x6", "M3 x 6 mm"]

standard = "DIN 7984"

[[presets]]

id = "M3x8"

title = "M3 × 8"

params = { size = "M3", length = 8 }

aliases = ["DIN 7984 M3x8", "low head cap screw M3x8", "M3 x 8 mm"]

standard = "DIN 7984"

[[presets]]

id = "M3x10"

title = "M3 × 10"

params = { size = "M3", length = 10 }

aliases = ["DIN 7984 M3x10", "low head cap screw M3x10", "M3 x 10 mm"]

standard = "DIN 7984"

[[presets]]

id = "M3x12"

title = "M3 × 12"

params = { size = "M3", length = 12 }

aliases = ["DIN 7984 M3x12", "low head cap screw M3x12", "M3 x 12 mm"]

standard = "DIN 7984"

[[presets]]

id = "M3x16"

title = "M3 × 16"

params = { size = "M3", length = 16 }

aliases = ["DIN 7984 M3x16", "low head cap screw M3x16", "M3 x 16 mm"]

standard = "DIN 7984"

[[presets]]

id = "M3x20"

title = "M3 × 20"

params = { size = "M3", length = 20 }

aliases = ["DIN 7984 M3x20", "low head cap screw M3x20", "M3 x 20 mm"]

standard = "DIN 7984"

[[presets]]

id = "M3x25"

title = "M3 × 25"

params = { size = "M3", length = 25 }

aliases = ["DIN 7984 M3x25", "low head cap screw M3x25", "M3 x 25 mm"]

standard = "DIN 7984"

[[presets]]

id = "M3x30"

title = "M3 × 30"

params = { size = "M3", length = 30 }

aliases = ["DIN 7984 M3x30", "low head cap screw M3x30", "M3 x 30 mm"]

standard = "DIN 7984"

[[presets]]

id = "M4x6"

title = "M4 × 6"

params = { size = "M4", length = 6 }

aliases = ["DIN 7984 M4x6", "low head cap screw M4x6", "M4 x 6 mm"]

standard = "DIN 7984"

[[presets]]

id = "M4x8"

title = "M4 × 8"

params = { size = "M4", length = 8 }

aliases = ["DIN 7984 M4x8", "low head cap screw M4x8", "M4 x 8 mm"]

standard = "DIN 7984"

[[presets]]

id = "M4x10"

title = "M4 × 10"

params = { size = "M4", length = 10 }

aliases = ["DIN 7984 M4x10", "low head cap screw M4x10", "M4 x 10 mm"]

standard = "DIN 7984"

[[presets]]

id = "M4x12"

title = "M4 × 12"

params = { size = "M4", length = 12 }

aliases = ["DIN 7984 M4x12", "low head cap screw M4x12", "M4 x 12 mm"]

standard = "DIN 7984"

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[[presets]]

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id = "M4x16"

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title = "M4 × 16"

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params = { size = "M4", length = 16 }

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aliases = ["DIN 7984 M4x16", "low head cap screw M4x16", "M4 x 16 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M4x20"

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title = "M4 × 20"

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params = { size = "M4", length = 20 }

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aliases = ["DIN 7984 M4x20", "low head cap screw M4x20", "M4 x 20 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M4x25"

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title = "M4 × 25"

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params = { size = "M4", length = 25 }

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aliases = ["DIN 7984 M4x25", "low head cap screw M4x25", "M4 x 25 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M4x30"

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title = "M4 × 30"

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params = { size = "M4", length = 30 }

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aliases = ["DIN 7984 M4x30", "low head cap screw M4x30", "M4 x 30 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M4x40"

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title = "M4 × 40"

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params = { size = "M4", length = 40 }

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aliases = ["DIN 7984 M4x40", "low head cap screw M4x40", "M4 x 40 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M5x8"

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title = "M5 × 8"

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params = { size = "M5", length = 8 }

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aliases = ["DIN 7984 M5x8", "low head cap screw M5x8", "M5 x 8 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M5x10"

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title = "M5 × 10"

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params = { size = "M5", length = 10 }

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aliases = ["DIN 7984 M5x10", "low head cap screw M5x10", "M5 x 10 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M5x12"

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title = "M5 × 12"

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params = { size = "M5", length = 12 }

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aliases = ["DIN 7984 M5x12", "low head cap screw M5x12", "M5 x 12 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M5x16"

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title = "M5 × 16"

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params = { size = "M5", length = 16 }

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aliases = ["DIN 7984 M5x16", "low head cap screw M5x16", "M5 x 16 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M5x20"

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title = "M5 × 20"

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params = { size = "M5", length = 20 }

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aliases = ["DIN 7984 M5x20", "low head cap screw M5x20", "M5 x 20 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M5x25"

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title = "M5 × 25"

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params = { size = "M5", length = 25 }

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aliases = ["DIN 7984 M5x25", "low head cap screw M5x25", "M5 x 25 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M5x30"

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title = "M5 × 30"

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params = { size = "M5", length = 30 }

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aliases = ["DIN 7984 M5x30", "low head cap screw M5x30", "M5 x 30 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M5x40"

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title = "M5 × 40"

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params = { size = "M5", length = 40 }

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aliases = ["DIN 7984 M5x40", "low head cap screw M5x40", "M5 x 40 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M5x50"

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title = "M5 × 50"

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params = { size = "M5", length = 50 }

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aliases = ["DIN 7984 M5x50", "low head cap screw M5x50", "M5 x 50 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M6x10"

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title = "M6 × 10"

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params = { size = "M6", length = 10 }

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aliases = ["DIN 7984 M6x10", "low head cap screw M6x10", "M6 x 10 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M6x12"

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title = "M6 × 12"

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params = { size = "M6", length = 12 }

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aliases = ["DIN 7984 M6x12", "low head cap screw M6x12", "M6 x 12 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M6x16"

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title = "M6 × 16"

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params = { size = "M6", length = 16 }

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aliases = ["DIN 7984 M6x16", "low head cap screw M6x16", "M6 x 16 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M6x20"

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title = "M6 × 20"

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params = { size = "M6", length = 20 }

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aliases = ["DIN 7984 M6x20", "low head cap screw M6x20", "M6 x 20 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M6x25"

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title = "M6 × 25"

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params = { size = "M6", length = 25 }

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aliases = ["DIN 7984 M6x25", "low head cap screw M6x25", "M6 x 25 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M6x30"

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title = "M6 × 30"

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params = { size = "M6", length = 30 }

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aliases = ["DIN 7984 M6x30", "low head cap screw M6x30", "M6 x 30 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M6x40"

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title = "M6 × 40"

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params = { size = "M6", length = 40 }

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aliases = ["DIN 7984 M6x40", "low head cap screw M6x40", "M6 x 40 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M6x50"

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title = "M6 × 50"

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params = { size = "M6", length = 50 }

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aliases = ["DIN 7984 M6x50", "low head cap screw M6x50", "M6 x 50 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M6x60"

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title = "M6 × 60"

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params = { size = "M6", length = 60 }

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aliases = ["DIN 7984 M6x60", "low head cap screw M6x60", "M6 x 60 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M8x16"

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title = "M8 × 16"

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params = { size = "M8", length = 16 }

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aliases = ["DIN 7984 M8x16", "low head cap screw M8x16", "M8 x 16 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M8x20"

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title = "M8 × 20"

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params = { size = "M8", length = 20 }

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aliases = ["DIN 7984 M8x20", "low head cap screw M8x20", "M8 x 20 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M8x25"

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title = "M8 × 25"

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params = { size = "M8", length = 25 }

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aliases = ["DIN 7984 M8x25", "low head cap screw M8x25", "M8 x 25 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M8x30"

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title = "M8 × 30"

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params = { size = "M8", length = 30 }

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aliases = ["DIN 7984 M8x30", "low head cap screw M8x30", "M8 x 30 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M8x40"

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title = "M8 × 40"

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params = { size = "M8", length = 40 }

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aliases = ["DIN 7984 M8x40", "low head cap screw M8x40", "M8 x 40 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M8x50"

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title = "M8 × 50"

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params = { size = "M8", length = 50 }

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aliases = ["DIN 7984 M8x50", "low head cap screw M8x50", "M8 x 50 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M8x60"

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title = "M8 × 60"

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params = { size = "M8", length = 60 }

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aliases = ["DIN 7984 M8x60", "low head cap screw M8x60", "M8 x 60 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M8x80"

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title = "M8 × 80"

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params = { size = "M8", length = 80 }

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aliases = ["DIN 7984 M8x80", "low head cap screw M8x80", "M8 x 80 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M10x20"

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title = "M10 × 20"

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params = { size = "M10", length = 20 }

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aliases = ["DIN 7984 M10x20", "low head cap screw M10x20", "M10 x 20 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M10x25"

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title = "M10 × 25"

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params = { size = "M10", length = 25 }

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aliases = ["DIN 7984 M10x25", "low head cap screw M10x25", "M10 x 25 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M10x30"

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title = "M10 × 30"

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params = { size = "M10", length = 30 }

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aliases = ["DIN 7984 M10x30", "low head cap screw M10x30", "M10 x 30 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M10x40"

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title = "M10 × 40"

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params = { size = "M10", length = 40 }

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aliases = ["DIN 7984 M10x40", "low head cap screw M10x40", "M10 x 40 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M10x50"

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title = "M10 × 50"

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params = { size = "M10", length = 50 }

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aliases = ["DIN 7984 M10x50", "low head cap screw M10x50", "M10 x 50 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M10x60"

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title = "M10 × 60"

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params = { size = "M10", length = 60 }

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aliases = ["DIN 7984 M10x60", "low head cap screw M10x60", "M10 x 60 mm"]

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standard = "DIN 7984"

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[[presets]]

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id = "M10x80"

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title = "M10 × 80"

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params = { size = "M10", length = 80 }

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aliases = ["DIN 7984 M10x80", "low head cap screw M10x80", "M10 x 80 mm"]

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standard = "DIN 7984"

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id = "M10x100"

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title = "M10 × 100"

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params = { size = "M10", length = 100 }

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aliases = ["DIN 7984 M10x100", "low head cap screw M10x100", "M10 x 100 mm"]

372

standard = "DIN 7984"

373

374

[[presets]]

375

id = "M12x25"

376

title = "M12 × 25"

377

params = { size = "M12", length = 25 }

378

aliases = ["DIN 7984 M12x25", "low head cap screw M12x25", "M12 x 25 mm"]

379

standard = "DIN 7984"

380

381

[[presets]]

382

id = "M12x30"

383

title = "M12 × 30"

384

params = { size = "M12", length = 30 }

385

aliases = ["DIN 7984 M12x30", "low head cap screw M12x30", "M12 x 30 mm"]

386

standard = "DIN 7984"

387

388

[[presets]]

389

id = "M12x40"

390

title = "M12 × 40"

391

params = { size = "M12", length = 40 }

392

aliases = ["DIN 7984 M12x40", "low head cap screw M12x40", "M12 x 40 mm"]

393

standard = "DIN 7984"

394

395

[[presets]]

396

id = "M12x50"

397

title = "M12 × 50"

398

params = { size = "M12", length = 50 }

399

aliases = ["DIN 7984 M12x50", "low head cap screw M12x50", "M12 x 50 mm"]

400

standard = "DIN 7984"

401

402

[[presets]]

403

id = "M12x60"

404

title = "M12 × 60"

405

params = { size = "M12", length = 60 }

406

aliases = ["DIN 7984 M12x60", "low head cap screw M12x60", "M12 x 60 mm"]

407

standard = "DIN 7984"

408

409

[[presets]]

410

id = "M12x80"

411

title = "M12 × 80"

412

params = { size = "M12", length = 80 }

413

aliases = ["DIN 7984 M12x80", "low head cap screw M12x80", "M12 x 80 mm"]

414

standard = "DIN 7984"

415

416

[[presets]]

417

id = "M12x100"

418

title = "M12 × 100"

419

params = { size = "M12", length = 100 }

420

aliases = ["DIN 7984 M12x100", "low head cap screw M12x100", "M12 x 100 mm"]

421

standard = "DIN 7984"

422

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

[[presets]]
id = "M3x4"
title = "M3 × 4"
params = { size = "M3", length = 4 }
aliases = ["DIN 7984 M3x4", "low head cap screw M3x4", "M3 x 4 mm"]
standard = "DIN 7984"

[[presets]]
id = "M3x5"
title = "M3 × 5"
params = { size = "M3", length = 5 }
aliases = ["DIN 7984 M3x5", "low head cap screw M3x5", "M3 x 5 mm"]
standard = "DIN 7984"

[[presets]]
id = "M3x6"
title = "M3 × 6"
params = { size = "M3", length = 6 }
aliases = ["DIN 7984 M3x6", "low head cap screw M3x6", "M3 x 6 mm"]
standard = "DIN 7984"

[[presets]]
id = "M3x8"
title = "M3 × 8"
params = { size = "M3", length = 8 }
aliases = ["DIN 7984 M3x8", "low head cap screw M3x8", "M3 x 8 mm"]
standard = "DIN 7984"

[[presets]]
id = "M3x10"
title = "M3 × 10"
params = { size = "M3", length = 10 }
aliases = ["DIN 7984 M3x10", "low head cap screw M3x10", "M3 x 10 mm"]
standard = "DIN 7984"

[[presets]]
id = "M3x12"
title = "M3 × 12"
params = { size = "M3", length = 12 }
aliases = ["DIN 7984 M3x12", "low head cap screw M3x12", "M3 x 12 mm"]
standard = "DIN 7984"

[[presets]]
id = "M3x16"
title = "M3 × 16"
params = { size = "M3", length = 16 }
aliases = ["DIN 7984 M3x16", "low head cap screw M3x16", "M3 x 16 mm"]
standard = "DIN 7984"

[[presets]]
id = "M3x20"
title = "M3 × 20"
params = { size = "M3", length = 20 }
aliases = ["DIN 7984 M3x20", "low head cap screw M3x20", "M3 x 20 mm"]
standard = "DIN 7984"

[[presets]]
id = "M3x25"
title = "M3 × 25"
params = { size = "M3", length = 25 }
aliases = ["DIN 7984 M3x25", "low head cap screw M3x25", "M3 x 25 mm"]
standard = "DIN 7984"

[[presets]]
id = "M3x30"
title = "M3 × 30"
params = { size = "M3", length = 30 }
aliases = ["DIN 7984 M3x30", "low head cap screw M3x30", "M3 x 30 mm"]
standard = "DIN 7984"

[[presets]]
id = "M4x6"
title = "M4 × 6"
params = { size = "M4", length = 6 }
aliases = ["DIN 7984 M4x6", "low head cap screw M4x6", "M4 x 6 mm"]
standard = "DIN 7984"

[[presets]]
id = "M4x8"
title = "M4 × 8"
params = { size = "M4", length = 8 }
aliases = ["DIN 7984 M4x8", "low head cap screw M4x8", "M4 x 8 mm"]
standard = "DIN 7984"

[[presets]]
id = "M4x10"
title = "M4 × 10"
params = { size = "M4", length = 10 }
aliases = ["DIN 7984 M4x10", "low head cap screw M4x10", "M4 x 10 mm"]
standard = "DIN 7984"

[[presets]]
id = "M4x12"
title = "M4 × 12"
params = { size = "M4", length = 12 }
aliases = ["DIN 7984 M4x12", "low head cap screw M4x12", "M4 x 12 mm"]
standard = "DIN 7984"

[[presets]]
id = "M4x16"
title = "M4 × 16"
params = { size = "M4", length = 16 }
aliases = ["DIN 7984 M4x16", "low head cap screw M4x16", "M4 x 16 mm"]
standard = "DIN 7984"

[[presets]]
id = "M4x20"
title = "M4 × 20"
params = { size = "M4", length = 20 }
aliases = ["DIN 7984 M4x20", "low head cap screw M4x20", "M4 x 20 mm"]
standard = "DIN 7984"

[[presets]]
id = "M4x25"
title = "M4 × 25"
params = { size = "M4", length = 25 }
aliases = ["DIN 7984 M4x25", "low head cap screw M4x25", "M4 x 25 mm"]
standard = "DIN 7984"

[[presets]]
id = "M4x30"
title = "M4 × 30"
params = { size = "M4", length = 30 }
aliases = ["DIN 7984 M4x30", "low head cap screw M4x30", "M4 x 30 mm"]
standard = "DIN 7984"

[[presets]]
id = "M4x40"
title = "M4 × 40"
params = { size = "M4", length = 40 }
aliases = ["DIN 7984 M4x40", "low head cap screw M4x40", "M4 x 40 mm"]
standard = "DIN 7984"

[[presets]]
id = "M5x8"
title = "M5 × 8"
params = { size = "M5", length = 8 }
aliases = ["DIN 7984 M5x8", "low head cap screw M5x8", "M5 x 8 mm"]
standard = "DIN 7984"

[[presets]]
id = "M5x10"
title = "M5 × 10"
params = { size = "M5", length = 10 }
aliases = ["DIN 7984 M5x10", "low head cap screw M5x10", "M5 x 10 mm"]
standard = "DIN 7984"

[[presets]]
id = "M5x12"
title = "M5 × 12"
params = { size = "M5", length = 12 }
aliases = ["DIN 7984 M5x12", "low head cap screw M5x12", "M5 x 12 mm"]
standard = "DIN 7984"

[[presets]]
id = "M5x16"
title = "M5 × 16"
params = { size = "M5", length = 16 }
aliases = ["DIN 7984 M5x16", "low head cap screw M5x16", "M5 x 16 mm"]
standard = "DIN 7984"

[[presets]]
id = "M5x20"
title = "M5 × 20"
params = { size = "M5", length = 20 }
aliases = ["DIN 7984 M5x20", "low head cap screw M5x20", "M5 x 20 mm"]
standard = "DIN 7984"

[[presets]]
id = "M5x25"
title = "M5 × 25"
params = { size = "M5", length = 25 }
aliases = ["DIN 7984 M5x25", "low head cap screw M5x25", "M5 x 25 mm"]
standard = "DIN 7984"

[[presets]]
id = "M5x30"
title = "M5 × 30"
params = { size = "M5", length = 30 }
aliases = ["DIN 7984 M5x30", "low head cap screw M5x30", "M5 x 30 mm"]
standard = "DIN 7984"

[[presets]]
id = "M5x40"
title = "M5 × 40"
params = { size = "M5", length = 40 }
aliases = ["DIN 7984 M5x40", "low head cap screw M5x40", "M5 x 40 mm"]
standard = "DIN 7984"

[[presets]]
id = "M5x50"
title = "M5 × 50"
params = { size = "M5", length = 50 }
aliases = ["DIN 7984 M5x50", "low head cap screw M5x50", "M5 x 50 mm"]
standard = "DIN 7984"

[[presets]]
id = "M6x10"
title = "M6 × 10"
params = { size = "M6", length = 10 }
aliases = ["DIN 7984 M6x10", "low head cap screw M6x10", "M6 x 10 mm"]
standard = "DIN 7984"

[[presets]]
id = "M6x12"
title = "M6 × 12"
params = { size = "M6", length = 12 }
aliases = ["DIN 7984 M6x12", "low head cap screw M6x12", "M6 x 12 mm"]
standard = "DIN 7984"

[[presets]]
id = "M6x16"
title = "M6 × 16"
params = { size = "M6", length = 16 }
aliases = ["DIN 7984 M6x16", "low head cap screw M6x16", "M6 x 16 mm"]
standard = "DIN 7984"

[[presets]]
id = "M6x20"
title = "M6 × 20"
params = { size = "M6", length = 20 }
aliases = ["DIN 7984 M6x20", "low head cap screw M6x20", "M6 x 20 mm"]
standard = "DIN 7984"

[[presets]]
id = "M6x25"
title = "M6 × 25"
params = { size = "M6", length = 25 }
aliases = ["DIN 7984 M6x25", "low head cap screw M6x25", "M6 x 25 mm"]
standard = "DIN 7984"

[[presets]]
id = "M6x30"
title = "M6 × 30"
params = { size = "M6", length = 30 }
aliases = ["DIN 7984 M6x30", "low head cap screw M6x30", "M6 x 30 mm"]
standard = "DIN 7984"

[[presets]]
id = "M6x40"
title = "M6 × 40"
params = { size = "M6", length = 40 }
aliases = ["DIN 7984 M6x40", "low head cap screw M6x40", "M6 x 40 mm"]
standard = "DIN 7984"

[[presets]]
id = "M6x50"
title = "M6 × 50"
params = { size = "M6", length = 50 }
aliases = ["DIN 7984 M6x50", "low head cap screw M6x50", "M6 x 50 mm"]
standard = "DIN 7984"

[[presets]]
id = "M6x60"
title = "M6 × 60"
params = { size = "M6", length = 60 }
aliases = ["DIN 7984 M6x60", "low head cap screw M6x60", "M6 x 60 mm"]
standard = "DIN 7984"

[[presets]]
id = "M8x16"
title = "M8 × 16"
params = { size = "M8", length = 16 }
aliases = ["DIN 7984 M8x16", "low head cap screw M8x16", "M8 x 16 mm"]
standard = "DIN 7984"

[[presets]]
id = "M8x20"
title = "M8 × 20"
params = { size = "M8", length = 20 }
aliases = ["DIN 7984 M8x20", "low head cap screw M8x20", "M8 x 20 mm"]
standard = "DIN 7984"

[[presets]]
id = "M8x25"
title = "M8 × 25"
params = { size = "M8", length = 25 }
aliases = ["DIN 7984 M8x25", "low head cap screw M8x25", "M8 x 25 mm"]
standard = "DIN 7984"

[[presets]]
id = "M8x30"
title = "M8 × 30"
params = { size = "M8", length = 30 }
aliases = ["DIN 7984 M8x30", "low head cap screw M8x30", "M8 x 30 mm"]
standard = "DIN 7984"

[[presets]]
id = "M8x40"
title = "M8 × 40"
params = { size = "M8", length = 40 }
aliases = ["DIN 7984 M8x40", "low head cap screw M8x40", "M8 x 40 mm"]
standard = "DIN 7984"

[[presets]]
id = "M8x50"
title = "M8 × 50"
params = { size = "M8", length = 50 }
aliases = ["DIN 7984 M8x50", "low head cap screw M8x50", "M8 x 50 mm"]
standard = "DIN 7984"

[[presets]]
id = "M8x60"
title = "M8 × 60"
params = { size = "M8", length = 60 }
aliases = ["DIN 7984 M8x60", "low head cap screw M8x60", "M8 x 60 mm"]
standard = "DIN 7984"

[[presets]]
id = "M8x80"
title = "M8 × 80"
params = { size = "M8", length = 80 }
aliases = ["DIN 7984 M8x80", "low head cap screw M8x80", "M8 x 80 mm"]
standard = "DIN 7984"

[[presets]]
id = "M10x20"
title = "M10 × 20"
params = { size = "M10", length = 20 }
aliases = ["DIN 7984 M10x20", "low head cap screw M10x20", "M10 x 20 mm"]
standard = "DIN 7984"

[[presets]]
id = "M10x25"
title = "M10 × 25"
params = { size = "M10", length = 25 }
aliases = ["DIN 7984 M10x25", "low head cap screw M10x25", "M10 x 25 mm"]
standard = "DIN 7984"

[[presets]]
id = "M10x30"
title = "M10 × 30"
params = { size = "M10", length = 30 }
aliases = ["DIN 7984 M10x30", "low head cap screw M10x30", "M10 x 30 mm"]
standard = "DIN 7984"

[[presets]]
id = "M10x40"
title = "M10 × 40"
params = { size = "M10", length = 40 }
aliases = ["DIN 7984 M10x40", "low head cap screw M10x40", "M10 x 40 mm"]
standard = "DIN 7984"

[[presets]]
id = "M10x50"
title = "M10 × 50"
params = { size = "M10", length = 50 }
aliases = ["DIN 7984 M10x50", "low head cap screw M10x50", "M10 x 50 mm"]
standard = "DIN 7984"

[[presets]]
id = "M10x60"
title = "M10 × 60"
params = { size = "M10", length = 60 }
aliases = ["DIN 7984 M10x60", "low head cap screw M10x60", "M10 x 60 mm"]
standard = "DIN 7984"

[[presets]]
id = "M10x80"
title = "M10 × 80"
params = { size = "M10", length = 80 }
aliases = ["DIN 7984 M10x80", "low head cap screw M10x80", "M10 x 80 mm"]
standard = "DIN 7984"

[[presets]]
id = "M10x100"
title = "M10 × 100"
params = { size = "M10", length = 100 }
aliases = ["DIN 7984 M10x100", "low head cap screw M10x100", "M10 x 100 mm"]
standard = "DIN 7984"

[[presets]]
id = "M12x25"
title = "M12 × 25"
params = { size = "M12", length = 25 }
aliases = ["DIN 7984 M12x25", "low head cap screw M12x25", "M12 x 25 mm"]
standard = "DIN 7984"

[[presets]]
id = "M12x30"
title = "M12 × 30"
params = { size = "M12", length = 30 }
aliases = ["DIN 7984 M12x30", "low head cap screw M12x30", "M12 x 30 mm"]
standard = "DIN 7984"

[[presets]]
id = "M12x40"
title = "M12 × 40"
params = { size = "M12", length = 40 }
aliases = ["DIN 7984 M12x40", "low head cap screw M12x40", "M12 x 40 mm"]
standard = "DIN 7984"

[[presets]]
id = "M12x50"
title = "M12 × 50"
params = { size = "M12", length = 50 }
aliases = ["DIN 7984 M12x50", "low head cap screw M12x50", "M12 x 50 mm"]
standard = "DIN 7984"

[[presets]]
id = "M12x60"
title = "M12 × 60"
params = { size = "M12", length = 60 }
aliases = ["DIN 7984 M12x60", "low head cap screw M12x60", "M12 x 60 mm"]
standard = "DIN 7984"

[[presets]]
id = "M12x80"
title = "M12 × 80"
params = { size = "M12", length = 80 }
aliases = ["DIN 7984 M12x80", "low head cap screw M12x80", "M12 x 80 mm"]
standard = "DIN 7984"

[[presets]]
id = "M12x100"
title = "M12 × 100"
params = { size = "M12", length = 100 }
aliases = ["DIN 7984 M12x100", "low head cap screw M12x100", "M12 x 100 mm"]
standard = "DIN 7984"

README.md 48 lines · Markdown

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Low head socket cap screw (DIN 7984)

Hexagon socket head cap screw with low head, metric coarse thread, M3 to M12, at any length. Presets cover the common catalogue sizes (M3 × 8, M6 × 20, ...).

Geometry

Envelope for assemblies and clearance checks:

cylindrical low head, diameter dk max, height k max;
hexagon socket, key size s (nominal), depth t min, flat bottom;
plain shank at the nominal thread diameter d, length l (length); the thread is not modelled.

The head's bearing face is on the XY plane at the origin, the head above it, the shank along -Z.

Parameters

Parameter	Meaning
`size`	Thread size, M3 to M12
`length`	Nominal length l under the head, mm
`material`	`steel` (property class 8.8, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-1)

Source

DIN 7984:2009-06, Hexagon socket head cap screws with low head, Tabelle 1, pp. 6-7: d, dk max, k max, s (nominal), t min. Read from a full copy of the standard (https://tdm-neva.ru/upload/screws/din-7984.pdf) and checked against fasten.it's reproduction of DIN 7984 2009-06 / 2021-10 / 2022-03 (https://fasten.it/en/Norms/Norm/DIN 7984, "t nom") and Aspen Fasteners' sheet (https://www.aspenfasteners.com/content/pdf/Metric_DIN_7984_spec.pdf, t nominal). DIN Media's change note for DIN 7984:2022-03 lists no dimensional change since 2009-06, so the values hold for the current edition.

Size	dk	k	s	t
M3	5.5	2.0	2.0	1.38
M4	7.0	2.8	2.5	2.18
M5	8.5	3.5	3.0	2.58
M6	10.0	4.0	4.0	2.88
M8	13.0	5.0	5.0	3.65
M10	16.0	6.0	7.0	4.35
M12	18.0	7.0	8.0	4.85

Corrected in this audit: t was the nominal depth (and 4.8 for M12, in no source) under a "t min" label; it is now the table's t min (1.38, 2.18, 2.58, 2.88, 3.65, 4.35, 4.85).

DIN 7984 starts at M3: the smaller low-head screws some catalogues list have no standard dimensions and are not included. Preset list: sizes and lengths of the step.parts catalogue (MIT), see library/NOTICE.md.

# Low head socket cap screw (DIN 7984)

Hexagon socket head cap screw with low head, metric coarse thread, M3 to M12, at any length. Presets cover the

common catalogue sizes (M3 × 8, M6 × 20, ...).

## Geometry

Envelope for assemblies and clearance checks:

- cylindrical low head, diameter **dk max**, height **k max**;

- hexagon socket, key size **s** (nominal), depth **t min**, flat bottom;

- plain shank at the nominal thread diameter **d**, length **l** (`length`); the thread is not modelled.

The head's bearing face is on the XY plane at the origin, the head above it, the shank along -Z.

## Parameters

| Parameter | Meaning |

|---|---|

| `size` | Thread size, M3 to M12 |

| `length` | Nominal length l under the head, mm |

| `material` | `steel` (property class 8.8, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-1) |

## Source

DIN 7984:2009-06, *Hexagon socket head cap screws with low head*, Tabelle 1, pp. 6-7: d, dk max, k max, s

(nominal), t min. Read from a full copy of the standard (<https://tdm-neva.ru/upload/screws/din-7984.pdf>) and checked

against fasten.it's reproduction of DIN 7984 2009-06 / 2021-10 / 2022-03 (<https://fasten.it/en/Norms/Norm/DIN%207984>,

"t nom") and Aspen Fasteners' sheet (<https://www.aspenfasteners.com/content/pdf/Metric_DIN_7984_spec.pdf>, t nominal).

DIN Media's change note for DIN 7984:2022-03 lists no dimensional change since 2009-06, so the values hold for the

current edition.

| Size | dk | k | s | t |

|---|---|---|---|---|

| M3 | 5.5 | 2.0 | 2.0 | 1.38 |

| M4 | 7.0 | 2.8 | 2.5 | 2.18 |

| M5 | 8.5 | 3.5 | 3.0 | 2.58 |

| M6 | 10.0 | 4.0 | 4.0 | 2.88 |

| M8 | 13.0 | 5.0 | 5.0 | 3.65 |

| M10 | 16.0 | 6.0 | 7.0 | 4.35 |

| M12 | 18.0 | 7.0 | 8.0 | 4.85 |

Corrected in this audit: t was the nominal depth (and 4.8 for M12, in no source) under a "t min" label; it is now

the table's t min (1.38, 2.18, 2.58, 2.88, 3.65, 4.35, 4.85).

DIN 7984 starts at M3: the smaller low-head screws some catalogues list have no standard dimensions and are not

included. Preset list: sizes and lengths of the step.parts catalogue (MIT), see `library/NOTICE.md`.

# Low head socket cap screw (DIN 7984)

Hexagon socket head cap screw with low head, metric coarse thread, M3 to M12, at any length. Presets cover the
common catalogue sizes (M3 × 8, M6 × 20, ...).

## Geometry

Envelope for assemblies and clearance checks:

- cylindrical low head, diameter **dk max**, height **k max**;
- hexagon socket, key size **s** (nominal), depth **t min**, flat bottom;
- plain shank at the nominal thread diameter **d**, length **l** (`length`); the thread is not modelled.

The head's bearing face is on the XY plane at the origin, the head above it, the shank along -Z.

## Parameters

| Parameter | Meaning |
|---|---|
| `size` | Thread size, M3 to M12 |
| `length` | Nominal length l under the head, mm |
| `material` | `steel` (property class 8.8, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-1) |

## Source

DIN 7984:2009-06, *Hexagon socket head cap screws with low head*, Tabelle 1, pp. 6-7: d, dk max, k max, s
(nominal), t min. Read from a full copy of the standard (<https://tdm-neva.ru/upload/screws/din-7984.pdf>) and checked
against fasten.it's reproduction of DIN 7984 2009-06 / 2021-10 / 2022-03 (<https://fasten.it/en/Norms/Norm/DIN%207984>,
"t nom") and Aspen Fasteners' sheet (<https://www.aspenfasteners.com/content/pdf/Metric_DIN_7984_spec.pdf>, t nominal).
DIN Media's change note for DIN 7984:2022-03 lists no dimensional change since 2009-06, so the values hold for the
current edition.

| Size | dk | k | s | t |
|---|---|---|---|---|
| M3 | 5.5 | 2.0 | 2.0 | 1.38 |
| M4 | 7.0 | 2.8 | 2.5 | 2.18 |
| M5 | 8.5 | 3.5 | 3.0 | 2.58 |
| M6 | 10.0 | 4.0 | 4.0 | 2.88 |
| M8 | 13.0 | 5.0 | 5.0 | 3.65 |
| M10 | 16.0 | 6.0 | 7.0 | 4.35 |
| M12 | 18.0 | 7.0 | 8.0 | 4.85 |

Corrected in this audit: t was the nominal depth (and 4.8 for M12, in no source) under a "t min" label; it is now
the table's t min (1.38, 2.18, 2.58, 2.88, 3.65, 4.35, 4.85).

DIN 7984 starts at M3: the smaller low-head screws some catalogues list have no standard dimensions and are not
included. Preset list: sizes and lengths of the step.parts catalogue (MIT), see `library/NOTICE.md`.

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Raw files, bundle and API

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About this part

steve58 parts

Profile

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

Mass: 3.27 g

At the parameters shown in the viewer.

License: MIT

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

Runtime: STEVE
Built with: CadQuery 2.9.0.dev0
Published: Nov 1, 2026
Downloads: 0
Builds: 0
Stars: 0
Bundle: b2950cc87f1f…

#fastener #screw #socket-head #low-head #din-7984 #metric

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DIN 7984 hexagon socket head cap screw with low head. Envelope geometry for assemblies: low cylindrical head (dk max, k max), hexagon socket (s, t min) and a plain shank at the nominal thread diameter; the thread itself is not modelled. The head's bearing face is on the XY plane at the origin and the shank points along -Z; `length` is the nominal length under the head. Dimensions from DIN 7984:2009-06 Table 1 (see the README).

Low head socket cap screw (DIN 7984)

Hexagon socket head cap screw with low head, metric coarse thread, M3 to M12, at any length. Presets cover the common catalogue sizes (M3 × 8, M6 × 20, ...).

Geometry

Envelope for assemblies and clearance checks:

cylindrical low head, diameter dk max, height k max;
hexagon socket, key size s (nominal), depth t min, flat bottom;
plain shank at the nominal thread diameter d, length l (length); the thread is not modelled.

The head's bearing face is on the XY plane at the origin, the head above it, the shank along -Z.

Parameters

Parameter	Meaning
`size`	Thread size, M3 to M12
`length`	Nominal length l under the head, mm
`material`	`steel` (property class 8.8, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-1)

Source

Size	dk	k	s	t
M3	5.5	2.0	2.0	1.38
M4	7.0	2.8	2.5	2.18
M5	8.5	3.5	3.0	2.58
M6	10.0	4.0	4.0	2.88
M8	13.0	5.0	5.0	3.65
M10	16.0	6.0	7.0	4.35
M12	18.0	7.0	8.0	4.85

Corrected in this audit: t was the nominal depth (and 4.8 for M12, in no source) under a "t min" label; it is now the table's t min (1.38, 2.18, 2.58, 2.88, 3.65, 4.35, 4.85).

1.0.0 Latest Nov 1, 2026 · 1 day ago

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steve/low-head-socket-cap-screw

Low head socket cap screw (DIN 7984)

Geometry

Parameters

Source

Low head socket cap screw (DIN 7984)

Geometry

Parameters

Source

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