steve/button-head-screw

Button head socket screw, ISO 7380, M3 to M12, any length.

v1.1.0 STEVE MIT 10

Open in STEVE

Isometric

Parameters

Thread size7 options

Length3–120 mm

Defaults built

part.py 46 lines · Python · STEVE runtime · checked

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"""ISO 7380 button head socket screw. Envelope: domed head (revolved profile), hex socket, plain shank.

The head's flat side is on the XY plane at the origin; the shank points down -Z.

Material: property class 10.9 alloy steel, quenched and tempered (34CrNiMo6 from the material library), black oxide."""

from steve import Model

size = "M4" # Thread size

length = 10 # mm Length under the head

# size: (head diameter dk, head height k, hex key s)

HEADS = {

'M3': (5.7, 1.65, 2.0),

'M4': (7.6, 2.2, 2.5),

'M5': (9.5, 2.75, 3.0),

'M6': (10.5, 3.3, 4.0),

'M8': (14.0, 4.4, 5.0),

'M10': (17.5, 5.5, 6.0),

'M12': (21.0, 6.6, 8.0),

}

NOMINAL = {

'M3': 3.0,

'M4': 4.0,

'M5': 5.0,

'M6': 6.0,

'M8': 8.0,

'M10': 10.0,

'M12': 12.0,

}

dk, k, s = HEADS[size]

d = NOMINAL[size]

model = Model()

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

sk.polyline("outline", [(0, 0), (dk / 2, 0), (dk / 2, 0.25 * k), (0.42 * dk, 0.7 * k), (0.3 * dk, 0.92 * k), (0, k)])

model.revolve("head", "head_profile", axis="Z")

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

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

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

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

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

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

model.extrude("socket", "socket_sketch", distance=-0.6 * k, op="cut")

model.material("steel-34crnimo6") # class 10.9 alloy steel

model.appearance(color="#2e3034", metalness=0.75, roughness=0.38) # black oxide finish

result = model.result()

"""ISO 7380 button head socket screw. Envelope: domed head (revolved profile), hex socket, plain shank.
The head's flat side is on the XY plane at the origin; the shank points down -Z.

Material: property class 10.9 alloy steel, quenched and tempered (34CrNiMo6 from the material library), black oxide."""
from steve import Model

size = "M4"  # Thread size
length = 10  # mm Length under the head

# size: (head diameter dk, head height k, hex key s)
HEADS = {
    'M3': (5.7, 1.65, 2.0),
    'M4': (7.6, 2.2, 2.5),
    'M5': (9.5, 2.75, 3.0),
    'M6': (10.5, 3.3, 4.0),
    'M8': (14.0, 4.4, 5.0),
    'M10': (17.5, 5.5, 6.0),
    'M12': (21.0, 6.6, 8.0),
}
NOMINAL = {
    'M3': 3.0,
    'M4': 4.0,
    'M5': 5.0,
    'M6': 6.0,
    'M8': 8.0,
    'M10': 10.0,
    'M12': 12.0,
}
dk, k, s = HEADS[size]
d = NOMINAL[size]

model = Model()
with model.sketch("head_profile", on="XZ", name="Head profile") as sk:
    sk.polyline("outline", [(0, 0), (dk / 2, 0), (dk / 2, 0.25 * k), (0.42 * dk, 0.7 * k), (0.3 * dk, 0.92 * k), (0, k)])
model.revolve("head", "head_profile", axis="Z")
with model.sketch("shank_sketch", on="XY", name="Shank") as sk:
    sk.circle("shank", (0, 0), d / 2)
model.extrude("shank", "shank_sketch", distance=-length)
model.plane("head_top", on="XY", offset=k, name="Head top")
with model.sketch("socket_sketch", on="head_top", name="Hex socket") as sk:
    sk.polygon("hex", (0, 0), s / 2, 6, inscribed=False)
model.extrude("socket", "socket_sketch", distance=-0.6 * k, op="cut")
model.material("steel-34crnimo6")  # class 10.9 alloy steel
model.appearance(color="#2e3034", metalness=0.75, roughness=0.38)  # black oxide finish
result = model.result()

pypart.toml 24 lines · TOML

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name = "steve/button-head-screw"

version = "1.1.0"

runtime = "steve"

license = "MIT"

summary = "Button head socket screw, ISO 7380, M3 to M12, any length."

description = "ISO 7380 button head socket screw. Envelope: domed head (revolved profile), hex socket, plain shank.\nThe head's flat side is on the XY plane at the origin; the shank points down -Z.\n\nMaterial: property class 10.9 alloy steel, quenched and tempered (34CrNiMo6 from the material library), black oxide.\n\nDimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread."

tags = ["fastener", "screw", "iso-7380", "metric"]

changes = "Materials and finishes: each part is made of its standard's engineering material, with its usual finish."

[parameters.size]

type = "choice"

default = "M4"

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

label = "Thread size"

[parameters.length]

type = "number"

default = 10

min = 3

max = 120

step = 1

unit = "mm"

label = "Length"

name = "steve/button-head-screw"
version = "1.1.0"
runtime = "steve"
license = "MIT"
summary = "Button head socket screw, ISO 7380, M3 to M12, any length."
description = "ISO 7380 button head socket screw. Envelope: domed head (revolved profile), hex socket, plain shank.\nThe head's flat side is on the XY plane at the origin; the shank points down -Z.\n\nMaterial: property class 10.9 alloy steel, quenched and tempered (34CrNiMo6 from the material library), black oxide.\n\nDimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread."
tags = ["fastener", "screw", "iso-7380", "metric"]
changes = "Materials and finishes: each part is made of its standard's engineering material, with its usual finish."

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

[parameters.length]
type = "number"
default = 10
min = 3
max = 120
step = 1
unit = "mm"
label = "Length"

Use this part

STEVE

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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/button-head-screw/v/1.1.0/raw/part.py"

Raw files, bundle and API

part.py
pypart.toml
bundle.tar.gzthe package, as published

curl "https://pythonparts.org/api/v1/parts/steve/button-head-screw/1.1.0"

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

About this part

steve58 parts

Profile

34CrNiMo6 (1.6582)Carbon & alloy steels · Custom finish · 7.8 g/cm³

Mass: 1.52 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: 10
Builds: 0
Stars: 0
Bundle: f131ce6c2189…

#fastener #screw #iso-7380 #metric

Checks

PassedImports: steve

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ISO 7380 button head socket screw. Envelope: domed head (revolved profile), hex socket, plain shank. The head's flat side is on the XY plane at the origin; the shank points down -Z. Material: property class 10.9 alloy steel, quenched and tempered (34CrNiMo6 from the material library), black oxide. Dimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread.

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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