steve/pan-head-screw

Pan head screw with cross recess, ISO 7045, M2 to M8, any length.

v1.1.0 Latest STEVE MIT 0

Open in STEVE

Isometric

Parameters

Thread size7 options

Length3–120 mm

Defaults built

part.py 50 lines · Python · STEVE runtime · checked

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"""ISO 7045 pan head screw with cross recess. Envelope: head, a simplified cross recess, plain shank.

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

Material: stainless steel A2 (AISI 304, 1.4301)."""

from steve import Model

size = "M3" # Thread size

length = 10 # mm Length under the head

# size: (head diameter dk, head height k, cross recess number)

HEADS = {

'M2': (4.0, 1.6, 1),

'M2.5': (5.0, 2.0, 1),

'M3': (5.6, 2.4, 1),

'M4': (8.0, 3.1, 2),

'M5': (9.5, 3.8, 2),

'M6': (12.0, 4.6, 3),

'M8': (16.0, 6.0, 4),

}

NOMINAL = {

'M2': 2.0,

'M2.5': 2.5,

'M3': 3.0,

'M4': 4.0,

'M5': 5.0,

'M6': 6.0,

'M8': 8.0,

}

dk, k, recess = HEADS[size]

d = NOMINAL[size]

arm = 0.55 * dk

slot = 0.12 * dk

model = Model()

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

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

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

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("cross_x", on="head_top", name="Recess X") as sk:

sk.center_rect("bar", (0, 0), arm, slot)

model.extrude("recess_x", "cross_x", distance=-0.5 * k, op="cut")

with model.sketch("cross_y", on="head_top", name="Recess Y") as sk:

sk.center_rect("bar", (0, 0), slot, arm)

model.extrude("recess_y", "cross_y", distance=-0.5 * k, op="cut")

model.material("stainless-304", finish="polished") # A2 stainless

result = model.result()

"""ISO 7045 pan head screw with cross recess. Envelope: head, a simplified cross recess, plain shank.
The head's bearing face is on the XY plane at the origin; the shank points down -Z.

Material: stainless steel A2 (AISI 304, 1.4301)."""
from steve import Model

size = "M3"  # Thread size
length = 10  # mm Length under the head

# size: (head diameter dk, head height k, cross recess number)
HEADS = {
    'M2': (4.0, 1.6, 1),
    'M2.5': (5.0, 2.0, 1),
    'M3': (5.6, 2.4, 1),
    'M4': (8.0, 3.1, 2),
    'M5': (9.5, 3.8, 2),
    'M6': (12.0, 4.6, 3),
    'M8': (16.0, 6.0, 4),
}
NOMINAL = {
    'M2': 2.0,
    'M2.5': 2.5,
    'M3': 3.0,
    'M4': 4.0,
    'M5': 5.0,
    'M6': 6.0,
    'M8': 8.0,
}
dk, k, recess = HEADS[size]
d = NOMINAL[size]
arm = 0.55 * dk
slot = 0.12 * dk

model = Model()
with model.sketch("head_sketch", on="XY", name="Head") as sk:
    sk.circle("head", (0, 0), dk / 2)
model.extrude("head", "head_sketch", distance=k)
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("cross_x", on="head_top", name="Recess X") as sk:
    sk.center_rect("bar", (0, 0), arm, slot)
model.extrude("recess_x", "cross_x", distance=-0.5 * k, op="cut")
with model.sketch("cross_y", on="head_top", name="Recess Y") as sk:
    sk.center_rect("bar", (0, 0), slot, arm)
model.extrude("recess_y", "cross_y", distance=-0.5 * k, op="cut")
model.material("stainless-304", finish="polished")  # A2 stainless
result = model.result()

pypart.toml 24 lines · TOML

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name = "steve/pan-head-screw"

version = "1.1.0"

runtime = "steve"

license = "MIT"

summary = "Pan head screw with cross recess, ISO 7045, M2 to M8, any length."

description = "ISO 7045 pan head screw with cross recess. Envelope: head, a simplified cross recess, plain shank.\nThe head's bearing face is on the XY plane at the origin; the shank points down -Z.\n\nMaterial: stainless steel A2 (AISI 304, 1.4301).\n\nDimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread."

tags = ["fastener", "screw", "iso-7045", "metric"]

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

[parameters.size]

type = "choice"

default = "M3"

choices = ["M2", "M2.5", "M3", "M4", "M5", "M6", "M8"]

label = "Thread size"

[parameters.length]

type = "number"

default = 10

min = 3

max = 120

step = 1

unit = "mm"

label = "Length"

name = "steve/pan-head-screw"
version = "1.1.0"
runtime = "steve"
license = "MIT"
summary = "Pan head screw with cross recess, ISO 7045, M2 to M8, any length."
description = "ISO 7045 pan head screw with cross recess. Envelope: head, a simplified cross recess, plain shank.\nThe head's bearing face is on the XY plane at the origin; the shank points down -Z.\n\nMaterial: stainless steel A2 (AISI 304, 1.4301).\n\nDimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread."
tags = ["fastener", "screw", "iso-7045", "metric"]
changes = "Materials and finishes: each part is made of its standard's engineering material, with its usual finish."

[parameters.size]
type = "choice"
default = "M3"
choices = ["M2", "M2.5", "M3", "M4", "M5", "M6", "M8"]
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/pan-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/pan-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

Stainless 304 (X5CrNi18-10, 1.4301)Stainless steels · Polished · 7.8 g/cm³

Mass: 0.98 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: f7df4f466354…

#fastener #screw #iso-7045 #metric

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ISO 7045 pan head screw with cross recess. Envelope: head, a simplified cross recess, plain shank. The head's bearing face is on the XY plane at the origin; the shank points down -Z. Material: stainless steel A2 (AISI 304, 1.4301). Dimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread.

1.1.0 Latest 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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