steve/countersunk-screw

Hexagon socket countersunk head screw, ISO 10642 / DIN 7991, M3 to M12, any length, with catalogue sizes as presets.

v2.0.0 Latest STEVE MIT 0

Open in STEVE

Isometric

Parameters

Preset62 sizes

Thread size7 options

Length3–200 mm

Nominal length l, overall (head included). At least the head height plus 0.5 mm.

Material3 options

steel: property class 8.8 to 12.9, 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 countersunk head screw, ISO 10642 (DIN 7991), M3 to M12, any length.

Envelope model for assemblies: 90 degree countersunk head (the cone of the theoretical sharp-edge diameter dk th and

height k, its rim turned to the actual head diameter dk min, so it sits in a countersink exactly as the standard

intends), 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 top face is on the XY plane at the origin, the screw along -Z; `length` is the nominal length

l, the overall length (head included), as the standard measures it.

"""

from steve import Model

size = "M4" # Thread size

length = 12 # mm Nominal length (overall, head included)

material = "steel" # Material

# ISO 10642:2004, Table 1 (official preview p. 4:

# https://cdn.standards.iteh.ai/samples/34454/32dec7e84d974361b85f744935ab2175/ISO-10642-2004.pdf; also

# https://fasten.it/en/Norms/Norm/DIN%20EN%20ISO%2010642, editions 2004-06 and 2013-04). size: (thread d, head diameter dk theoretical max, head diameter dk actual min,

# head height k max, hexagon socket s, socket depth t min)

DIMENSIONS = {

"M3": (3.0, 6.72, 5.54, 1.86, 2.0, 1.1),

"M4": (4.0, 8.96, 7.53, 2.48, 2.5, 1.5),

"M5": (5.0, 11.2, 9.43, 3.1, 3.0, 1.9),

"M6": (6.0, 13.44, 11.34, 3.72, 4.0, 2.2),

"M8": (8.0, 17.92, 15.24, 4.96, 5.0, 3.0),

"M10": (10.0, 22.4, 19.22, 6.2, 6.0, 3.6),

"M12": (12.0, 26.88, 23.12, 7.44, 8.0, 4.3),

}

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

MATERIALS = {

"steel": ("steel-generic", "#2b2d30"), # property class 8.8 / 10.9 / 12.9, black oxide finish

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

"stainless-a4": ("stainless-316", "#c9ccd0"), # ISO 3506-1 A4-70 / A4-80

}

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

material_id, colour = MATERIALS[material]

total = max(length, k + 0.5)

land = (dk_th - dk) / 2 # the 90° cone reaches dk this far under the top face

model = Model()

with model.sketch("profile", on="XZ", name="Profile") as sk:

sk.polyline("outline", [(0, 0), (dk / 2, 0), (dk / 2, -land), (d / 2, -k), (d / 2, -total), (0, -total)])

model.revolve("body", "profile", axis="Z", name="Screw")

with model.sketch("socket_sketch", on="XY", 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 countersunk head screw, ISO 10642 (DIN 7991), M3 to M12, any length.

Envelope model for assemblies: 90 degree countersunk head (the cone of the theoretical sharp-edge diameter dk th and
height k, its rim turned to the actual head diameter dk min, so it sits in a countersink exactly as the standard
intends), 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 top face is on the XY plane at the origin, the screw along -Z; `length` is the nominal length
l, the overall length (head included), as the standard measures it.
"""
from steve import Model

size = "M4"  # Thread size
length = 12  # mm Nominal length (overall, head included)
material = "steel"  # Material

# ISO 10642:2004, Table 1 (official preview p. 4:
# https://cdn.standards.iteh.ai/samples/34454/32dec7e84d974361b85f744935ab2175/ISO-10642-2004.pdf; also
# https://fasten.it/en/Norms/Norm/DIN%20EN%20ISO%2010642, editions 2004-06 and 2013-04). size: (thread d, head diameter dk theoretical max, head diameter dk actual min,
# head height k max, hexagon socket s, socket depth t min)
DIMENSIONS = {
    "M3": (3.0, 6.72, 5.54, 1.86, 2.0, 1.1),
    "M4": (4.0, 8.96, 7.53, 2.48, 2.5, 1.5),
    "M5": (5.0, 11.2, 9.43, 3.1, 3.0, 1.9),
    "M6": (6.0, 13.44, 11.34, 3.72, 4.0, 2.2),
    "M8": (8.0, 17.92, 15.24, 4.96, 5.0, 3.0),
    "M10": (10.0, 22.4, 19.22, 6.2, 6.0, 3.6),
    "M12": (12.0, 26.88, 23.12, 7.44, 8.0, 4.3),
}
# material choice: (STEVE material library id, appearance colour)
MATERIALS = {
    "steel": ("steel-generic", "#2b2d30"),        # property class 8.8 / 10.9 / 12.9, black oxide finish
    "stainless-a2": ("stainless-304", "#c9ccd0"),  # ISO 3506-1 A2-70
    "stainless-a4": ("stainless-316", "#c9ccd0"),  # ISO 3506-1 A4-70 / A4-80
}

d, dk_th, dk, k, s, t = DIMENSIONS[size]
material_id, colour = MATERIALS[material]
total = max(length, k + 0.5)
land = (dk_th - dk) / 2  # the 90° cone reaches dk this far under the top face

model = Model()
with model.sketch("profile", on="XZ", name="Profile") as sk:
    sk.polyline("outline", [(0, 0), (dk / 2, 0), (dk / 2, -land), (d / 2, -k), (d / 2, -total), (0, -total)])
model.revolve("body", "profile", axis="Z", name="Screw")
with model.sketch("socket_sketch", on="XY", 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/countersunk-screw"

version = "2.0.0"

runtime = "steve"

license = "MIT"

summary = "Hexagon socket countersunk head screw, ISO 10642 / DIN 7991, M3 to M12, any length, with catalogue sizes as presets."

description = """ISO 10642 (DIN 7991) hexagon socket countersunk head screw. Envelope geometry for assemblies: 90° \

head (the theoretical sharp-edge cone of height k, rim at the actual head diameter dk min), hexagon socket (s, t min) and a plain shank at the nominal \

thread diameter; the thread itself is not modelled.

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

overall (head included), as the standard measures it. Dimensions from ISO 10642:2004 Table 1 (see the README)."""

tags = ["fastener", "screw", "countersunk", "flat-head", "iso-10642", "din-7991", "metric"]

[parameters.size]

type = "choice"

default = "M4"

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

label = "Thread size"

[parameters.length]

type = "number"

default = 12

min = 3

max = 200

step = 1

unit = "mm"

label = "Length"

description = "Nominal length l, overall (head included). At least the head height plus 0.5 mm."

[parameters.material]

type = "choice"

default = "steel"

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

label = "Material"

description = "steel: property class 8.8 to 12.9, black oxide; stainless-a2 / stainless-a4: ISO 3506-1 A2 / A4."

name = "steve/countersunk-screw"
version = "2.0.0"
runtime = "steve"
license = "MIT"
summary = "Hexagon socket countersunk head screw, ISO 10642 / DIN 7991, M3 to M12, any length, with catalogue sizes as presets."
description = """ISO 10642 (DIN 7991) hexagon socket countersunk head screw. Envelope geometry for assemblies: 90° \
head (the theoretical sharp-edge cone of height k, rim at the actual head diameter dk min), hexagon socket (s, t min) and a plain shank at the nominal \
thread diameter; the thread itself is not modelled.

The head's top face is on the XY plane at the origin and the screw points along -Z; `length` is the nominal length, \
overall (head included), as the standard measures it. Dimensions from ISO 10642:2004 Table 1 (see the README)."""
tags = ["fastener", "screw", "countersunk", "flat-head", "iso-10642", "din-7991", "metric"]

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

[parameters.length]
type = "number"
default = 12
min = 3
max = 200
step = 1
unit = "mm"
label = "Length"
description = "Nominal length l, overall (head included). At least the head height plus 0.5 mm."

[parameters.material]
type = "choice"
default = "steel"
choices = ["steel", "stainless-a2", "stainless-a4"]
label = "Material"
description = "steel: property class 8.8 to 12.9, black oxide; stainless-a2 / stainless-a4: ISO 3506-1 A2 / A4."

presets.toml 436 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 = ["ISO 10642 M3x4", "DIN 7991 M3x4", "countersunk screw M3x4", "flat head socket screw M3x4", "M3 x 4 mm"]

standard = "ISO 10642"

[[presets]]

id = "M3x5"

title = "M3 × 5"

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

aliases = ["ISO 10642 M3x5", "DIN 7991 M3x5", "countersunk screw M3x5", "flat head socket screw M3x5", "M3 x 5 mm"]

standard = "ISO 10642"

[[presets]]

id = "M3x6"

title = "M3 × 6"

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

aliases = ["ISO 10642 M3x6", "DIN 7991 M3x6", "countersunk screw M3x6", "flat head socket screw M3x6", "M3 countersunk socket screw", "ISO10642 M3x6"]

standard = "ISO 10642"

[[presets]]

id = "M3x8"

title = "M3 × 8"

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

aliases = ["ISO 10642 M3x8", "DIN 7991 M3x8", "countersunk screw M3x8", "flat head socket screw M3x8", "M3 x 8 mm"]

standard = "ISO 10642"

[[presets]]

id = "M3x10"

title = "M3 × 10"

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

aliases = ["ISO 10642 M3x10", "DIN 7991 M3x10", "countersunk screw M3x10", "flat head socket screw M3x10", "M3 countersunk socket screw", "ISO10642 M3x10"]

standard = "ISO 10642"

[[presets]]

id = "M3x12"

title = "M3 × 12"

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

aliases = ["ISO 10642 M3x12", "DIN 7991 M3x12", "countersunk screw M3x12", "flat head socket screw M3x12", "M3 countersunk socket screw", "ISO10642 M3x12"]

standard = "ISO 10642"

[[presets]]

id = "M3x16"

title = "M3 × 16"

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

aliases = ["ISO 10642 M3x16", "DIN 7991 M3x16", "countersunk screw M3x16", "flat head socket screw M3x16", "M3 x 16 mm"]

standard = "ISO 10642"

[[presets]]

id = "M3x20"

title = "M3 × 20"

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

aliases = ["ISO 10642 M3x20", "DIN 7991 M3x20", "countersunk screw M3x20", "flat head socket screw M3x20", "M3 x 20 mm"]

standard = "ISO 10642"

[[presets]]

id = "M3x25"

title = "M3 × 25"

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

aliases = ["ISO 10642 M3x25", "DIN 7991 M3x25", "countersunk screw M3x25", "flat head socket screw M3x25", "M3 x 25 mm"]

standard = "ISO 10642"

[[presets]]

id = "M3x30"

title = "M3 × 30"

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

aliases = ["ISO 10642 M3x30", "DIN 7991 M3x30", "countersunk screw M3x30", "flat head socket screw M3x30", "M3 x 30 mm"]

standard = "ISO 10642"

[[presets]]

id = "M3x35"

title = "M3 × 35"

params = { size = "M3", length = 35 }

aliases = ["ISO 10642 M3x35", "DIN 7991 M3x35", "countersunk screw M3x35", "flat head socket screw M3x35", "M3 x 35 mm"]

standard = "ISO 10642"

[[presets]]

id = "M3x40"

title = "M3 × 40"

params = { size = "M3", length = 40 }

aliases = ["ISO 10642 M3x40", "DIN 7991 M3x40", "countersunk screw M3x40", "flat head socket screw M3x40", "M3 x 40 mm"]

standard = "ISO 10642"

[[presets]]

id = "M3x50"

title = "M3 × 50"

params = { size = "M3", length = 50 }

aliases = ["ISO 10642 M3x50", "DIN 7991 M3x50", "countersunk screw M3x50", "flat head socket screw M3x50", "M3 x 50 mm"]

standard = "ISO 10642"

[[presets]]

id = "M4x4"

title = "M4 × 4"

params = { size = "M4", length = 4 }

aliases = ["ISO 10642 M4x4", "DIN 7991 M4x4", "countersunk screw M4x4", "flat head socket screw M4x4", "M4 x 4 mm"]

standard = "ISO 10642"

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[[presets]]

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id = "M4x5"

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title = "M4 × 5"

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params = { size = "M4", length = 5 }

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aliases = ["ISO 10642 M4x5", "DIN 7991 M4x5", "countersunk screw M4x5", "flat head socket screw M4x5", "M4 x 5 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M4x6"

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title = "M4 × 6"

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

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aliases = ["ISO 10642 M4x6", "DIN 7991 M4x6", "countersunk screw M4x6", "flat head socket screw M4x6", "M4 x 6 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M4x8"

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title = "M4 × 8"

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

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aliases = ["ISO 10642 M4x8", "DIN 7991 M4x8", "countersunk screw M4x8", "flat head socket screw M4x8", "M4 x 8 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M4x10"

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title = "M4 × 10"

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

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aliases = ["ISO 10642 M4x10", "DIN 7991 M4x10", "countersunk screw M4x10", "flat head socket screw M4x10", "M4 x 10 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M4x12"

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title = "M4 × 12"

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

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aliases = ["ISO 10642 M4x12", "DIN 7991 M4x12", "countersunk screw M4x12", "flat head socket screw M4x12", "M4 x 12 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M4x16", "DIN 7991 M4x16", "countersunk screw M4x16", "flat head socket screw M4x16", "M4 x 16 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M4x20", "DIN 7991 M4x20", "countersunk screw M4x20", "flat head socket screw M4x20", "M4 x 20 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M4x25", "DIN 7991 M4x25", "countersunk screw M4x25", "flat head socket screw M4x25", "M4 x 25 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M4x30", "DIN 7991 M4x30", "countersunk screw M4x30", "flat head socket screw M4x30", "M4 x 30 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M4x35"

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title = "M4 × 35"

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params = { size = "M4", length = 35 }

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aliases = ["ISO 10642 M4x35", "DIN 7991 M4x35", "countersunk screw M4x35", "flat head socket screw M4x35", "M4 x 35 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M4x40", "DIN 7991 M4x40", "countersunk screw M4x40", "flat head socket screw M4x40", "M4 x 40 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M4x50"

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title = "M4 × 50"

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params = { size = "M4", length = 50 }

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aliases = ["ISO 10642 M4x50", "DIN 7991 M4x50", "countersunk screw M4x50", "flat head socket screw M4x50", "M4 x 50 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M5x4"

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title = "M5 × 4"

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params = { size = "M5", length = 4 }

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aliases = ["ISO 10642 M5x4", "DIN 7991 M5x4", "countersunk screw M5x4", "flat head socket screw M5x4", "M5 x 4 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M5x5"

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title = "M5 × 5"

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params = { size = "M5", length = 5 }

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aliases = ["ISO 10642 M5x5", "DIN 7991 M5x5", "countersunk screw M5x5", "flat head socket screw M5x5", "M5 x 5 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M5x6"

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title = "M5 × 6"

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params = { size = "M5", length = 6 }

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aliases = ["ISO 10642 M5x6", "DIN 7991 M5x6", "countersunk screw M5x6", "flat head socket screw M5x6", "M5 x 6 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M5x8", "DIN 7991 M5x8", "countersunk screw M5x8", "flat head socket screw M5x8", "M5 x 8 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M5x10", "DIN 7991 M5x10", "countersunk screw M5x10", "flat head socket screw M5x10", "M5 x 10 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M5x12", "DIN 7991 M5x12", "countersunk screw M5x12", "flat head socket screw M5x12", "M5 x 12 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M5x16", "DIN 7991 M5x16", "countersunk screw M5x16", "flat head socket screw M5x16", "M5 x 16 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M5x20", "DIN 7991 M5x20", "countersunk screw M5x20", "flat head socket screw M5x20", "M5 x 20 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M5x25", "DIN 7991 M5x25", "countersunk screw M5x25", "flat head socket screw M5x25", "M5 x 25 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M5x30", "DIN 7991 M5x30", "countersunk screw M5x30", "flat head socket screw M5x30", "M5 x 30 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M5x35"

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title = "M5 × 35"

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params = { size = "M5", length = 35 }

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aliases = ["ISO 10642 M5x35", "DIN 7991 M5x35", "countersunk screw M5x35", "flat head socket screw M5x35", "M5 x 35 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M5x40", "DIN 7991 M5x40", "countersunk screw M5x40", "flat head socket screw M5x40", "M5 x 40 mm"]

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standard = "ISO 10642"

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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 = ["ISO 10642 M5x50", "DIN 7991 M5x50", "countersunk screw M5x50", "flat head socket screw M5x50", "M5 x 50 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M6x5"

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title = "M6 × 5"

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params = { size = "M6", length = 5 }

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aliases = ["ISO 10642 M6x5", "DIN 7991 M6x5", "countersunk screw M6x5", "flat head socket screw M6x5", "M6 x 5 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M6x6"

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title = "M6 × 6"

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params = { size = "M6", length = 6 }

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aliases = ["ISO 10642 M6x6", "DIN 7991 M6x6", "countersunk screw M6x6", "flat head socket screw M6x6", "M6 x 6 mm"]

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standard = "ISO 10642"

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[[presets]]

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id = "M6x8"

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title = "M6 × 8"

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params = { size = "M6", length = 8 }

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aliases = ["ISO 10642 M6x8", "DIN 7991 M6x8", "countersunk screw M6x8", "flat head socket screw M6x8", "M6 x 8 mm"]

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standard = "ISO 10642"

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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 }

301

aliases = ["ISO 10642 M6x10", "DIN 7991 M6x10", "countersunk screw M6x10", "flat head socket screw M6x10", "M6 x 10 mm"]

302

standard = "ISO 10642"

303

304

[[presets]]

305

id = "M6x12"

306

title = "M6 × 12"

307

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

308

aliases = ["ISO 10642 M6x12", "DIN 7991 M6x12", "countersunk screw M6x12", "flat head socket screw M6x12", "M6 countersunk socket screw", "ISO10642 M6x12"]

309

standard = "ISO 10642"

310

311

[[presets]]

312

id = "M6x16"

313

title = "M6 × 16"

314

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

315

aliases = ["ISO 10642 M6x16", "DIN 7991 M6x16", "countersunk screw M6x16", "flat head socket screw M6x16", "M6 x 16 mm"]

316

standard = "ISO 10642"

317

318

[[presets]]

319

id = "M6x20"

320

title = "M6 × 20"

321

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

322

aliases = ["ISO 10642 M6x20", "DIN 7991 M6x20", "countersunk screw M6x20", "flat head socket screw M6x20", "M6 x 20 mm"]

323

standard = "ISO 10642"

324

325

[[presets]]

326

id = "M6x25"

327

title = "M6 × 25"

328

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

329

aliases = ["ISO 10642 M6x25", "DIN 7991 M6x25", "countersunk screw M6x25", "flat head socket screw M6x25", "M6 x 25 mm"]

330

standard = "ISO 10642"

331

332

[[presets]]

333

id = "M6x30"

334

title = "M6 × 30"

335

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

336

aliases = ["ISO 10642 M6x30", "DIN 7991 M6x30", "countersunk screw M6x30", "flat head socket screw M6x30", "M6 x 30 mm"]

337

standard = "ISO 10642"

338

339

[[presets]]

340

id = "M6x35"

341

title = "M6 × 35"

342

params = { size = "M6", length = 35 }

343

aliases = ["ISO 10642 M6x35", "DIN 7991 M6x35", "countersunk screw M6x35", "flat head socket screw M6x35", "M6 x 35 mm"]

344

standard = "ISO 10642"

345

346

[[presets]]

347

id = "M6x40"

348

title = "M6 × 40"

349

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

350

aliases = ["ISO 10642 M6x40", "DIN 7991 M6x40", "countersunk screw M6x40", "flat head socket screw M6x40", "M6 x 40 mm"]

351

standard = "ISO 10642"

352

353

[[presets]]

354

id = "M6x50"

355

title = "M6 × 50"

356

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

357

aliases = ["ISO 10642 M6x50", "DIN 7991 M6x50", "countersunk screw M6x50", "flat head socket screw M6x50", "M6 x 50 mm"]

358

standard = "ISO 10642"

359

360

[[presets]]

361

id = "M8x6"

362

title = "M8 × 6"

363

params = { size = "M8", length = 6 }

364

aliases = ["ISO 10642 M8x6", "DIN 7991 M8x6", "countersunk screw M8x6", "flat head socket screw M8x6", "M8 x 6 mm"]

365

standard = "ISO 10642"

366

367

[[presets]]

368

id = "M8x8"

369

title = "M8 × 8"

370

params = { size = "M8", length = 8 }

371

aliases = ["ISO 10642 M8x8", "DIN 7991 M8x8", "countersunk screw M8x8", "flat head socket screw M8x8", "M8 x 8 mm"]

372

standard = "ISO 10642"

373

374

[[presets]]

375

id = "M8x10"

376

title = "M8 × 10"

377

params = { size = "M8", length = 10 }

378

aliases = ["ISO 10642 M8x10", "DIN 7991 M8x10", "countersunk screw M8x10", "flat head socket screw M8x10", "M8 x 10 mm"]

379

standard = "ISO 10642"

380

381

[[presets]]

382

id = "M8x12"

383

title = "M8 × 12"

384

params = { size = "M8", length = 12 }

385

aliases = ["ISO 10642 M8x12", "DIN 7991 M8x12", "countersunk screw M8x12", "flat head socket screw M8x12", "M8 x 12 mm"]

386

standard = "ISO 10642"

387

388

[[presets]]

389

id = "M8x16"

390

title = "M8 × 16"

391

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

392

aliases = ["ISO 10642 M8x16", "DIN 7991 M8x16", "countersunk screw M8x16", "flat head socket screw M8x16", "M8 x 16 mm"]

393

standard = "ISO 10642"

394

395

[[presets]]

396

id = "M8x20"

397

title = "M8 × 20"

398

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

399

aliases = ["ISO 10642 M8x20", "DIN 7991 M8x20", "countersunk screw M8x20", "flat head socket screw M8x20", "M8 x 20 mm"]

400

standard = "ISO 10642"

401

402

[[presets]]

403

id = "M8x25"

404

title = "M8 × 25"

405

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

406

aliases = ["ISO 10642 M8x25", "DIN 7991 M8x25", "countersunk screw M8x25", "flat head socket screw M8x25", "M8 x 25 mm"]

407

standard = "ISO 10642"

408

409

[[presets]]

410

id = "M8x30"

411

title = "M8 × 30"

412

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

413

aliases = ["ISO 10642 M8x30", "DIN 7991 M8x30", "countersunk screw M8x30", "flat head socket screw M8x30", "M8 x 30 mm"]

414

standard = "ISO 10642"

415

416

[[presets]]

417

id = "M8x35"

418

title = "M8 × 35"

419

params = { size = "M8", length = 35 }

420

aliases = ["ISO 10642 M8x35", "DIN 7991 M8x35", "countersunk screw M8x35", "flat head socket screw M8x35", "M8 x 35 mm"]

421

standard = "ISO 10642"

422

423

[[presets]]

424

id = "M8x40"

425

title = "M8 × 40"

426

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

427

aliases = ["ISO 10642 M8x40", "DIN 7991 M8x40", "countersunk screw M8x40", "flat head socket screw M8x40", "M8 x 40 mm"]

428

standard = "ISO 10642"

429

430

[[presets]]

431

id = "M8x50"

432

title = "M8 × 50"

433

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

434

aliases = ["ISO 10642 M8x50", "DIN 7991 M8x50", "countersunk screw M8x50", "flat head socket screw M8x50", "M8 x 50 mm"]

435

standard = "ISO 10642"

436

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

[[presets]]
id = "M3x4"
title = "M3 × 4"
params = { size = "M3", length = 4 }
aliases = ["ISO 10642 M3x4", "DIN 7991 M3x4", "countersunk screw M3x4", "flat head socket screw M3x4", "M3 x 4 mm"]
standard = "ISO 10642"

[[presets]]
id = "M3x5"
title = "M3 × 5"
params = { size = "M3", length = 5 }
aliases = ["ISO 10642 M3x5", "DIN 7991 M3x5", "countersunk screw M3x5", "flat head socket screw M3x5", "M3 x 5 mm"]
standard = "ISO 10642"

[[presets]]
id = "M3x6"
title = "M3 × 6"
params = { size = "M3", length = 6 }
aliases = ["ISO 10642 M3x6", "DIN 7991 M3x6", "countersunk screw M3x6", "flat head socket screw M3x6", "M3 countersunk socket screw", "ISO10642 M3x6"]
standard = "ISO 10642"

[[presets]]
id = "M3x8"
title = "M3 × 8"
params = { size = "M3", length = 8 }
aliases = ["ISO 10642 M3x8", "DIN 7991 M3x8", "countersunk screw M3x8", "flat head socket screw M3x8", "M3 x 8 mm"]
standard = "ISO 10642"

[[presets]]
id = "M3x10"
title = "M3 × 10"
params = { size = "M3", length = 10 }
aliases = ["ISO 10642 M3x10", "DIN 7991 M3x10", "countersunk screw M3x10", "flat head socket screw M3x10", "M3 countersunk socket screw", "ISO10642 M3x10"]
standard = "ISO 10642"

[[presets]]
id = "M3x12"
title = "M3 × 12"
params = { size = "M3", length = 12 }
aliases = ["ISO 10642 M3x12", "DIN 7991 M3x12", "countersunk screw M3x12", "flat head socket screw M3x12", "M3 countersunk socket screw", "ISO10642 M3x12"]
standard = "ISO 10642"

[[presets]]
id = "M3x16"
title = "M3 × 16"
params = { size = "M3", length = 16 }
aliases = ["ISO 10642 M3x16", "DIN 7991 M3x16", "countersunk screw M3x16", "flat head socket screw M3x16", "M3 x 16 mm"]
standard = "ISO 10642"

[[presets]]
id = "M3x20"
title = "M3 × 20"
params = { size = "M3", length = 20 }
aliases = ["ISO 10642 M3x20", "DIN 7991 M3x20", "countersunk screw M3x20", "flat head socket screw M3x20", "M3 x 20 mm"]
standard = "ISO 10642"

[[presets]]
id = "M3x25"
title = "M3 × 25"
params = { size = "M3", length = 25 }
aliases = ["ISO 10642 M3x25", "DIN 7991 M3x25", "countersunk screw M3x25", "flat head socket screw M3x25", "M3 x 25 mm"]
standard = "ISO 10642"

[[presets]]
id = "M3x30"
title = "M3 × 30"
params = { size = "M3", length = 30 }
aliases = ["ISO 10642 M3x30", "DIN 7991 M3x30", "countersunk screw M3x30", "flat head socket screw M3x30", "M3 x 30 mm"]
standard = "ISO 10642"

[[presets]]
id = "M3x35"
title = "M3 × 35"
params = { size = "M3", length = 35 }
aliases = ["ISO 10642 M3x35", "DIN 7991 M3x35", "countersunk screw M3x35", "flat head socket screw M3x35", "M3 x 35 mm"]
standard = "ISO 10642"

[[presets]]
id = "M3x40"
title = "M3 × 40"
params = { size = "M3", length = 40 }
aliases = ["ISO 10642 M3x40", "DIN 7991 M3x40", "countersunk screw M3x40", "flat head socket screw M3x40", "M3 x 40 mm"]
standard = "ISO 10642"

[[presets]]
id = "M3x50"
title = "M3 × 50"
params = { size = "M3", length = 50 }
aliases = ["ISO 10642 M3x50", "DIN 7991 M3x50", "countersunk screw M3x50", "flat head socket screw M3x50", "M3 x 50 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x4"
title = "M4 × 4"
params = { size = "M4", length = 4 }
aliases = ["ISO 10642 M4x4", "DIN 7991 M4x4", "countersunk screw M4x4", "flat head socket screw M4x4", "M4 x 4 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x5"
title = "M4 × 5"
params = { size = "M4", length = 5 }
aliases = ["ISO 10642 M4x5", "DIN 7991 M4x5", "countersunk screw M4x5", "flat head socket screw M4x5", "M4 x 5 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x6"
title = "M4 × 6"
params = { size = "M4", length = 6 }
aliases = ["ISO 10642 M4x6", "DIN 7991 M4x6", "countersunk screw M4x6", "flat head socket screw M4x6", "M4 x 6 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x8"
title = "M4 × 8"
params = { size = "M4", length = 8 }
aliases = ["ISO 10642 M4x8", "DIN 7991 M4x8", "countersunk screw M4x8", "flat head socket screw M4x8", "M4 x 8 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x10"
title = "M4 × 10"
params = { size = "M4", length = 10 }
aliases = ["ISO 10642 M4x10", "DIN 7991 M4x10", "countersunk screw M4x10", "flat head socket screw M4x10", "M4 x 10 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x12"
title = "M4 × 12"
params = { size = "M4", length = 12 }
aliases = ["ISO 10642 M4x12", "DIN 7991 M4x12", "countersunk screw M4x12", "flat head socket screw M4x12", "M4 x 12 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x16"
title = "M4 × 16"
params = { size = "M4", length = 16 }
aliases = ["ISO 10642 M4x16", "DIN 7991 M4x16", "countersunk screw M4x16", "flat head socket screw M4x16", "M4 x 16 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x20"
title = "M4 × 20"
params = { size = "M4", length = 20 }
aliases = ["ISO 10642 M4x20", "DIN 7991 M4x20", "countersunk screw M4x20", "flat head socket screw M4x20", "M4 x 20 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x25"
title = "M4 × 25"
params = { size = "M4", length = 25 }
aliases = ["ISO 10642 M4x25", "DIN 7991 M4x25", "countersunk screw M4x25", "flat head socket screw M4x25", "M4 x 25 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x30"
title = "M4 × 30"
params = { size = "M4", length = 30 }
aliases = ["ISO 10642 M4x30", "DIN 7991 M4x30", "countersunk screw M4x30", "flat head socket screw M4x30", "M4 x 30 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x35"
title = "M4 × 35"
params = { size = "M4", length = 35 }
aliases = ["ISO 10642 M4x35", "DIN 7991 M4x35", "countersunk screw M4x35", "flat head socket screw M4x35", "M4 x 35 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x40"
title = "M4 × 40"
params = { size = "M4", length = 40 }
aliases = ["ISO 10642 M4x40", "DIN 7991 M4x40", "countersunk screw M4x40", "flat head socket screw M4x40", "M4 x 40 mm"]
standard = "ISO 10642"

[[presets]]
id = "M4x50"
title = "M4 × 50"
params = { size = "M4", length = 50 }
aliases = ["ISO 10642 M4x50", "DIN 7991 M4x50", "countersunk screw M4x50", "flat head socket screw M4x50", "M4 x 50 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x4"
title = "M5 × 4"
params = { size = "M5", length = 4 }
aliases = ["ISO 10642 M5x4", "DIN 7991 M5x4", "countersunk screw M5x4", "flat head socket screw M5x4", "M5 x 4 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x5"
title = "M5 × 5"
params = { size = "M5", length = 5 }
aliases = ["ISO 10642 M5x5", "DIN 7991 M5x5", "countersunk screw M5x5", "flat head socket screw M5x5", "M5 x 5 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x6"
title = "M5 × 6"
params = { size = "M5", length = 6 }
aliases = ["ISO 10642 M5x6", "DIN 7991 M5x6", "countersunk screw M5x6", "flat head socket screw M5x6", "M5 x 6 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x8"
title = "M5 × 8"
params = { size = "M5", length = 8 }
aliases = ["ISO 10642 M5x8", "DIN 7991 M5x8", "countersunk screw M5x8", "flat head socket screw M5x8", "M5 x 8 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x10"
title = "M5 × 10"
params = { size = "M5", length = 10 }
aliases = ["ISO 10642 M5x10", "DIN 7991 M5x10", "countersunk screw M5x10", "flat head socket screw M5x10", "M5 x 10 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x12"
title = "M5 × 12"
params = { size = "M5", length = 12 }
aliases = ["ISO 10642 M5x12", "DIN 7991 M5x12", "countersunk screw M5x12", "flat head socket screw M5x12", "M5 x 12 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x16"
title = "M5 × 16"
params = { size = "M5", length = 16 }
aliases = ["ISO 10642 M5x16", "DIN 7991 M5x16", "countersunk screw M5x16", "flat head socket screw M5x16", "M5 x 16 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x20"
title = "M5 × 20"
params = { size = "M5", length = 20 }
aliases = ["ISO 10642 M5x20", "DIN 7991 M5x20", "countersunk screw M5x20", "flat head socket screw M5x20", "M5 x 20 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x25"
title = "M5 × 25"
params = { size = "M5", length = 25 }
aliases = ["ISO 10642 M5x25", "DIN 7991 M5x25", "countersunk screw M5x25", "flat head socket screw M5x25", "M5 x 25 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x30"
title = "M5 × 30"
params = { size = "M5", length = 30 }
aliases = ["ISO 10642 M5x30", "DIN 7991 M5x30", "countersunk screw M5x30", "flat head socket screw M5x30", "M5 x 30 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x35"
title = "M5 × 35"
params = { size = "M5", length = 35 }
aliases = ["ISO 10642 M5x35", "DIN 7991 M5x35", "countersunk screw M5x35", "flat head socket screw M5x35", "M5 x 35 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x40"
title = "M5 × 40"
params = { size = "M5", length = 40 }
aliases = ["ISO 10642 M5x40", "DIN 7991 M5x40", "countersunk screw M5x40", "flat head socket screw M5x40", "M5 x 40 mm"]
standard = "ISO 10642"

[[presets]]
id = "M5x50"
title = "M5 × 50"
params = { size = "M5", length = 50 }
aliases = ["ISO 10642 M5x50", "DIN 7991 M5x50", "countersunk screw M5x50", "flat head socket screw M5x50", "M5 x 50 mm"]
standard = "ISO 10642"

[[presets]]
id = "M6x5"
title = "M6 × 5"
params = { size = "M6", length = 5 }
aliases = ["ISO 10642 M6x5", "DIN 7991 M6x5", "countersunk screw M6x5", "flat head socket screw M6x5", "M6 x 5 mm"]
standard = "ISO 10642"

[[presets]]
id = "M6x6"
title = "M6 × 6"
params = { size = "M6", length = 6 }
aliases = ["ISO 10642 M6x6", "DIN 7991 M6x6", "countersunk screw M6x6", "flat head socket screw M6x6", "M6 x 6 mm"]
standard = "ISO 10642"

[[presets]]
id = "M6x8"
title = "M6 × 8"
params = { size = "M6", length = 8 }
aliases = ["ISO 10642 M6x8", "DIN 7991 M6x8", "countersunk screw M6x8", "flat head socket screw M6x8", "M6 x 8 mm"]
standard = "ISO 10642"

[[presets]]
id = "M6x10"
title = "M6 × 10"
params = { size = "M6", length = 10 }
aliases = ["ISO 10642 M6x10", "DIN 7991 M6x10", "countersunk screw M6x10", "flat head socket screw M6x10", "M6 x 10 mm"]
standard = "ISO 10642"

[[presets]]
id = "M6x12"
title = "M6 × 12"
params = { size = "M6", length = 12 }
aliases = ["ISO 10642 M6x12", "DIN 7991 M6x12", "countersunk screw M6x12", "flat head socket screw M6x12", "M6 countersunk socket screw", "ISO10642 M6x12"]
standard = "ISO 10642"

[[presets]]
id = "M6x16"
title = "M6 × 16"
params = { size = "M6", length = 16 }
aliases = ["ISO 10642 M6x16", "DIN 7991 M6x16", "countersunk screw M6x16", "flat head socket screw M6x16", "M6 x 16 mm"]
standard = "ISO 10642"

[[presets]]
id = "M6x20"
title = "M6 × 20"
params = { size = "M6", length = 20 }
aliases = ["ISO 10642 M6x20", "DIN 7991 M6x20", "countersunk screw M6x20", "flat head socket screw M6x20", "M6 x 20 mm"]
standard = "ISO 10642"

[[presets]]
id = "M6x25"
title = "M6 × 25"
params = { size = "M6", length = 25 }
aliases = ["ISO 10642 M6x25", "DIN 7991 M6x25", "countersunk screw M6x25", "flat head socket screw M6x25", "M6 x 25 mm"]
standard = "ISO 10642"

[[presets]]
id = "M6x30"
title = "M6 × 30"
params = { size = "M6", length = 30 }
aliases = ["ISO 10642 M6x30", "DIN 7991 M6x30", "countersunk screw M6x30", "flat head socket screw M6x30", "M6 x 30 mm"]
standard = "ISO 10642"

[[presets]]
id = "M6x35"
title = "M6 × 35"
params = { size = "M6", length = 35 }
aliases = ["ISO 10642 M6x35", "DIN 7991 M6x35", "countersunk screw M6x35", "flat head socket screw M6x35", "M6 x 35 mm"]
standard = "ISO 10642"

[[presets]]
id = "M6x40"
title = "M6 × 40"
params = { size = "M6", length = 40 }
aliases = ["ISO 10642 M6x40", "DIN 7991 M6x40", "countersunk screw M6x40", "flat head socket screw M6x40", "M6 x 40 mm"]
standard = "ISO 10642"

[[presets]]
id = "M6x50"
title = "M6 × 50"
params = { size = "M6", length = 50 }
aliases = ["ISO 10642 M6x50", "DIN 7991 M6x50", "countersunk screw M6x50", "flat head socket screw M6x50", "M6 x 50 mm"]
standard = "ISO 10642"

[[presets]]
id = "M8x6"
title = "M8 × 6"
params = { size = "M8", length = 6 }
aliases = ["ISO 10642 M8x6", "DIN 7991 M8x6", "countersunk screw M8x6", "flat head socket screw M8x6", "M8 x 6 mm"]
standard = "ISO 10642"

[[presets]]
id = "M8x8"
title = "M8 × 8"
params = { size = "M8", length = 8 }
aliases = ["ISO 10642 M8x8", "DIN 7991 M8x8", "countersunk screw M8x8", "flat head socket screw M8x8", "M8 x 8 mm"]
standard = "ISO 10642"

[[presets]]
id = "M8x10"
title = "M8 × 10"
params = { size = "M8", length = 10 }
aliases = ["ISO 10642 M8x10", "DIN 7991 M8x10", "countersunk screw M8x10", "flat head socket screw M8x10", "M8 x 10 mm"]
standard = "ISO 10642"

[[presets]]
id = "M8x12"
title = "M8 × 12"
params = { size = "M8", length = 12 }
aliases = ["ISO 10642 M8x12", "DIN 7991 M8x12", "countersunk screw M8x12", "flat head socket screw M8x12", "M8 x 12 mm"]
standard = "ISO 10642"

[[presets]]
id = "M8x16"
title = "M8 × 16"
params = { size = "M8", length = 16 }
aliases = ["ISO 10642 M8x16", "DIN 7991 M8x16", "countersunk screw M8x16", "flat head socket screw M8x16", "M8 x 16 mm"]
standard = "ISO 10642"

[[presets]]
id = "M8x20"
title = "M8 × 20"
params = { size = "M8", length = 20 }
aliases = ["ISO 10642 M8x20", "DIN 7991 M8x20", "countersunk screw M8x20", "flat head socket screw M8x20", "M8 x 20 mm"]
standard = "ISO 10642"

[[presets]]
id = "M8x25"
title = "M8 × 25"
params = { size = "M8", length = 25 }
aliases = ["ISO 10642 M8x25", "DIN 7991 M8x25", "countersunk screw M8x25", "flat head socket screw M8x25", "M8 x 25 mm"]
standard = "ISO 10642"

[[presets]]
id = "M8x30"
title = "M8 × 30"
params = { size = "M8", length = 30 }
aliases = ["ISO 10642 M8x30", "DIN 7991 M8x30", "countersunk screw M8x30", "flat head socket screw M8x30", "M8 x 30 mm"]
standard = "ISO 10642"

[[presets]]
id = "M8x35"
title = "M8 × 35"
params = { size = "M8", length = 35 }
aliases = ["ISO 10642 M8x35", "DIN 7991 M8x35", "countersunk screw M8x35", "flat head socket screw M8x35", "M8 x 35 mm"]
standard = "ISO 10642"

[[presets]]
id = "M8x40"
title = "M8 × 40"
params = { size = "M8", length = 40 }
aliases = ["ISO 10642 M8x40", "DIN 7991 M8x40", "countersunk screw M8x40", "flat head socket screw M8x40", "M8 x 40 mm"]
standard = "ISO 10642"

[[presets]]
id = "M8x50"
title = "M8 × 50"
params = { size = "M8", length = 50 }
aliases = ["ISO 10642 M8x50", "DIN 7991 M8x50", "countersunk screw M8x50", "flat head socket screw M8x50", "M8 x 50 mm"]
standard = "ISO 10642"

README.md 52 lines · Markdown

Download

Countersunk head screw (ISO 10642 / DIN 7991)

Hexagon socket countersunk (flat) head screw, metric coarse thread, M3 to M12, at any length. Presets cover the common catalogue sizes (M3 × 8, M5 × 16, ...).

Geometry

Envelope for assemblies and countersink checks:

90° countersunk head: the cone of the theoretical (sharp-edge) diameter dk th and height k = (dk th − d) / 2, its rim turned to the actual head diameter dk min (a short cylindrical land at the top), so the cone seats in a countersink exactly as the standard intends;
hexagon socket, key size s (nominal), depth t min, flat bottom;
plain shank at the nominal thread diameter d; the thread is not modelled.

length is the nominal length l, measured overall (head included) as ISO 10642 does; it must be at least k + 0.5 mm. The head's top face is on the XY plane at the origin, the screw along -Z.

Parameters

Parameter	Meaning
`size`	Thread size, M3 to M12
`length`	Nominal length l, overall, mm
`material`	`steel` (property class 8.8 to 12.9, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-1)

Source

ISO 10642:2004, Hexagon socket countersunk head screws, Table 1, p. 4: d, dk theoretical max, dk actual min, k max, s (nominal), t min, read from the official preview (https://cdn.standards.iteh.ai/samples/34454/32dec7e84d974361b85f744935ab2175/ISO-10642-2004.pdf; the M8 t is under the preview's watermark and was read from fasten.it) and checked against fasten.it's DIN EN ISO 10642 2004-06 and 2013-04 tables (https://fasten.it/en/Norms/Norm/DIN EN ISO 10642). Amendment 1:2012 changes only dk min of M20 (not offered here).

Edition note: ISO 10642:2019 (DIN EN ISO 10642:2020-02; carried into ISO 10642:2026) replaced w min by t max and, in fasten.it's reproduction of DIN EN ISO 10642:2020-02 (its only source found), lists smaller t min for M4 (1.4), M5 (1.75), M8 (2.9) and M10 (3.5). This recipe models the 2004 edition's values, which are confirmed by the official preview; every other column is the same in both.

Size	dk th	dk min	k	s	t
M3	6.72	5.54	1.86	2.0	1.1
M4	8.96	7.53	2.48	2.5	1.5
M5	11.2	9.43	3.1	3.0	1.9
M6	13.44	11.34	3.72	4.0	2.2
M8	17.92	15.24	4.96	5.0	3.0
M10	22.4	19.22	6.2	6.0	3.6
M12	26.88	23.12	7.44	8.0	4.3

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

# Countersunk head screw (ISO 10642 / DIN 7991)

Hexagon socket countersunk (flat) head screw, metric coarse thread, M3 to M12, at any length. Presets cover the

common catalogue sizes (M3 × 8, M5 × 16, ...).

## Geometry

Envelope for assemblies and countersink checks:

- 90° countersunk head: the cone of the theoretical (sharp-edge) diameter **dk th** and height **k** = (dk th − d) / 2,

its rim turned to the actual head diameter **dk min** (a short cylindrical land at the top), so the cone seats in a

countersink exactly as the standard intends;

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

- plain shank at the nominal thread diameter **d**; the thread is not modelled.

`length` is the nominal length l, measured overall (head included) as ISO 10642 does; it must be at least k + 0.5 mm.

The head's top face is on the XY plane at the origin, the screw along -Z.

## Parameters

| Parameter | Meaning |

|---|---|

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

| `length` | Nominal length l, overall, mm |

| `material` | `steel` (property class 8.8 to 12.9, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-1) |

## Source

ISO 10642:2004, *Hexagon socket countersunk head screws*, Table 1, p. 4: d, dk theoretical max, dk actual min, k max,

s (nominal), t min, read from the official preview

(<https://cdn.standards.iteh.ai/samples/34454/32dec7e84d974361b85f744935ab2175/ISO-10642-2004.pdf>; the M8 t is

under the preview's watermark and was read from fasten.it) and checked against fasten.it's DIN EN ISO 10642 2004-06

and 2013-04 tables (<https://fasten.it/en/Norms/Norm/DIN%20EN%20ISO%2010642>). Amendment 1:2012 changes only dk min of

M20 (not offered here).

Edition note: ISO 10642:2019 (DIN EN ISO 10642:2020-02; carried into ISO 10642:2026) replaced w min by t max and,

in fasten.it's reproduction of DIN EN ISO 10642:2020-02 (its only source found), lists smaller t min for M4 (1.4),

M5 (1.75), M8 (2.9) and M10 (3.5). This recipe models the 2004 edition's values, which are confirmed by the official

preview; every other column is the same in both.

| Size | dk th | dk min | k | s | t |

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

| M3 | 6.72 | 5.54 | 1.86 | 2.0 | 1.1 |

| M4 | 8.96 | 7.53 | 2.48 | 2.5 | 1.5 |

| M5 | 11.2 | 9.43 | 3.1 | 3.0 | 1.9 |

| M6 | 13.44 | 11.34 | 3.72 | 4.0 | 2.2 |

| M8 | 17.92 | 15.24 | 4.96 | 5.0 | 3.0 |

| M10 | 22.4 | 19.22 | 6.2 | 6.0 | 3.6 |

| M12 | 26.88 | 23.12 | 7.44 | 8.0 | 4.3 |

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

# Countersunk head screw (ISO 10642 / DIN 7991)

Hexagon socket countersunk (flat) head screw, metric coarse thread, M3 to M12, at any length. Presets cover the
common catalogue sizes (M3 × 8, M5 × 16, ...).

## Geometry

Envelope for assemblies and countersink checks:

- 90° countersunk head: the cone of the theoretical (sharp-edge) diameter **dk th** and height **k** = (dk th − d) / 2,
  its rim turned to the actual head diameter **dk min** (a short cylindrical land at the top), so the cone seats in a
  countersink exactly as the standard intends;
- hexagon socket, key size **s** (nominal), depth **t min**, flat bottom;
- plain shank at the nominal thread diameter **d**; the thread is not modelled.

`length` is the nominal length l, measured overall (head included) as ISO 10642 does; it must be at least k + 0.5 mm.
The head's top face is on the XY plane at the origin, the screw along -Z.

## Parameters

| Parameter | Meaning |
|---|---|
| `size` | Thread size, M3 to M12 |
| `length` | Nominal length l, overall, mm |
| `material` | `steel` (property class 8.8 to 12.9, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-1) |

## Source

ISO 10642:2004, *Hexagon socket countersunk head screws*, Table 1, p. 4: d, dk theoretical max, dk actual min, k max,
s (nominal), t min, read from the official preview
(<https://cdn.standards.iteh.ai/samples/34454/32dec7e84d974361b85f744935ab2175/ISO-10642-2004.pdf>; the M8 t is
under the preview's watermark and was read from fasten.it) and checked against fasten.it's DIN EN ISO 10642 2004-06
and 2013-04 tables (<https://fasten.it/en/Norms/Norm/DIN%20EN%20ISO%2010642>). Amendment 1:2012 changes only dk min of
M20 (not offered here).

Edition note: ISO 10642:2019 (DIN EN ISO 10642:2020-02; carried into ISO 10642:2026) replaced w min by t max and,
in fasten.it's reproduction of DIN EN ISO 10642:2020-02 (its only source found), lists smaller t min for M4 (1.4),
M5 (1.75), M8 (2.9) and M10 (3.5). This recipe models the 2004 edition's values, which are confirmed by the official
preview; every other column is the same in both.

| Size | dk th | dk min | k | s | t |
|---|---|---|---|---|---|
| M3 | 6.72 | 5.54 | 1.86 | 2.0 | 1.1 |
| M4 | 8.96 | 7.53 | 2.48 | 2.5 | 1.5 |
| M5 | 11.2 | 9.43 | 3.1 | 3.0 | 1.9 |
| M6 | 13.44 | 11.34 | 3.72 | 4.0 | 2.2 |
| M8 | 17.92 | 15.24 | 4.96 | 5.0 | 3.0 |
| M10 | 22.4 | 19.22 | 6.2 | 6.0 | 3.6 |
| M12 | 26.88 | 23.12 | 7.44 | 8.0 | 4.3 |

Preset list: sizes and lengths of the step.parts catalogue (MIT), see `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/countersunk-screw/v/2.0.0/raw/part.py"

Raw files, bundle and API

curl "https://pythonparts.org/api/v1/parts/steve/countersunk-screw/2.0.0"

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

About this part

steve58 parts

Profile

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

Mass: 1.51 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: 1
Stars: 0
Bundle: 7689d1d6f7ba…

#fastener #screw #countersunk #flat-head #iso-10642 #din-7991 #metric

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ISO 10642 (DIN 7991) hexagon socket countersunk head screw. Envelope geometry for assemblies: 90° head (the theoretical sharp-edge cone of height k, rim at the actual head diameter dk min), hexagon socket (s, t min) and a plain shank at the nominal thread diameter; the thread itself is not modelled. The head's top face is on the XY plane at the origin and the screw points along -Z; `length` is the nominal length, overall (head included), as the standard measures it. Dimensions from ISO 10642:2004 Table 1 (see the README).

Countersunk head screw (ISO 10642 / DIN 7991)

Hexagon socket countersunk (flat) head screw, metric coarse thread, M3 to M12, at any length. Presets cover the common catalogue sizes (M3 × 8, M5 × 16, ...).

Geometry

Envelope for assemblies and countersink checks:

90° countersunk head: the cone of the theoretical (sharp-edge) diameter dk th and height k = (dk th − d) / 2, its rim turned to the actual head diameter dk min (a short cylindrical land at the top), so the cone seats in a countersink exactly as the standard intends;
hexagon socket, key size s (nominal), depth t min, flat bottom;
plain shank at the nominal thread diameter d; the thread is not modelled.

length is the nominal length l, measured overall (head included) as ISO 10642 does; it must be at least k + 0.5 mm. The head's top face is on the XY plane at the origin, the screw along -Z.

Parameters

Parameter	Meaning
`size`	Thread size, M3 to M12
`length`	Nominal length l, overall, mm
`material`	`steel` (property class 8.8 to 12.9, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-1)

Source

Size	dk th	dk min	k	s	t
M3	6.72	5.54	1.86	2.0	1.1
M4	8.96	7.53	2.48	2.5	1.5
M5	11.2	9.43	3.1	3.0	1.9
M6	13.44	11.34	3.72	4.0	2.2
M8	17.92	15.24	4.96	5.0	3.0
M10	22.4	19.22	6.2	6.0	3.6
M12	26.88	23.12	7.44	8.0	4.3

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

2.0.0 Latest Nov 1, 2026 · 1 day ago Compare with 1.1.0
1.1.0 Nov 1, 2026 · 2 days ago Compare with 1.0.0

Materials and finishes: each part is made of its standard's engineering material, with its usual finish.
1.0.0 Oct 31, 2026 · 2 days ago

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steve/countersunk-screw

Countersunk head screw (ISO 10642 / DIN 7991)

Geometry

Parameters

Source

Countersunk head screw (ISO 10642 / DIN 7991)

Geometry

Parameters

Source

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