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."