name = "steve/captive-panel-screw"
version = "1.0.0"
runtime = "steve"
license = "MIT"
summary = "Captive panel screw envelope, M3 to M5, any length: shank and round knob (simplified)."
description = """A captive panel screw envelope for assemblies: a shank at the thread's nominal diameter and a round \
knob (2d across, d high) centred on its top end, two bodies, M3 to M5 at any length. Measured from step.parts' \
published models (MIT); no maker or standard is behind them (PennEngineering PF11/PF12 come in other lengths).

Shank along +Z from the origin. Dimensions and attribution: see the README."""
tags = ["captive-screw", "panel-screw", "screw", "fastener", "panel", "metric"]

[parameters.thread]
type = "choice"
default = "M3"
choices = ["M3", "M4", "M5"]
label = "Thread"

[parameters.length]
type = "number"
default = 20
min = 4
max = 100
unit = "mm"
label = "Shank length"

[parameters.material]
type = "choice"
default = "unspecified"
choices = ["unspecified", "steel", "stainless-304"]
label = "Material"

[[presets]]
id = "M3x10"
title = "Captive panel screw M3 × 10 (envelope)"
params = { thread = "M3", length = 10 }
aliases = ["captive screw M3x10", "panel screw M3 x 10", "captive panel fastener M3 10 mm", "captive panel screw", "thread=M3; captive screw length=10 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M3x12"
title = "Captive panel screw M3 × 12 (envelope)"
params = { thread = "M3", length = 12 }
aliases = ["captive screw M3x12", "panel screw M3 x 12", "captive panel fastener M3 12 mm", "captive panel screw", "thread=M3; captive screw length=12 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M3x16"
title = "Captive panel screw M3 × 16 (envelope)"
params = { thread = "M3", length = 16 }
aliases = ["captive screw M3x16", "panel screw M3 x 16", "captive panel fastener M3 16 mm", "captive panel screw", "thread=M3; captive screw length=16 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M3x20"
title = "Captive panel screw M3 × 20 (envelope)"
params = { thread = "M3", length = 20 }
aliases = ["captive screw M3x20", "panel screw M3 x 20", "captive panel fastener M3 20 mm", "captive panel screw", "thread=M3; captive screw length=20 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M3x25"
title = "Captive panel screw M3 × 25 (envelope)"
params = { thread = "M3", length = 25 }
aliases = ["captive screw M3x25", "panel screw M3 x 25", "captive panel fastener M3 25 mm", "captive panel screw", "thread=M3; captive screw length=25 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M3x30"
title = "Captive panel screw M3 × 30 (envelope)"
params = { thread = "M3", length = 30 }
aliases = ["captive screw M3x30", "panel screw M3 x 30", "captive panel fastener M3 30 mm", "captive panel screw", "thread=M3; captive screw length=30 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M4x10"
title = "Captive panel screw M4 × 10 (envelope)"
params = { thread = "M4", length = 10 }
aliases = ["captive screw M4x10", "panel screw M4 x 10", "captive panel fastener M4 10 mm", "captive panel screw", "thread=M4; captive screw length=10 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M4x12"
title = "Captive panel screw M4 × 12 (envelope)"
params = { thread = "M4", length = 12 }
aliases = ["captive screw M4x12", "panel screw M4 x 12", "captive panel fastener M4 12 mm", "captive panel screw", "thread=M4; captive screw length=12 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M4x16"
title = "Captive panel screw M4 × 16 (envelope)"
params = { thread = "M4", length = 16 }
aliases = ["captive screw M4x16", "panel screw M4 x 16", "captive panel fastener M4 16 mm", "captive panel screw", "thread=M4; captive screw length=16 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M4x20"
title = "Captive panel screw M4 × 20 (envelope)"
params = { thread = "M4", length = 20 }
aliases = ["captive screw M4x20", "panel screw M4 x 20", "captive panel fastener M4 20 mm", "captive panel screw", "thread=M4; captive screw length=20 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M4x25"
title = "Captive panel screw M4 × 25 (envelope)"
params = { thread = "M4", length = 25 }
aliases = ["captive screw M4x25", "panel screw M4 x 25", "captive panel fastener M4 25 mm", "captive panel screw", "thread=M4; captive screw length=25 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M4x30"
title = "Captive panel screw M4 × 30 (envelope)"
params = { thread = "M4", length = 30 }
aliases = ["captive screw M4x30", "panel screw M4 x 30", "captive panel fastener M4 30 mm", "captive panel screw", "thread=M4; captive screw length=30 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M5x10"
title = "Captive panel screw M5 × 10 (envelope)"
params = { thread = "M5", length = 10 }
aliases = ["captive screw M5x10", "panel screw M5 x 10", "captive panel fastener M5 10 mm", "captive panel screw", "thread=M5; captive screw length=10 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M5x12"
title = "Captive panel screw M5 × 12 (envelope)"
params = { thread = "M5", length = 12 }
aliases = ["captive screw M5x12", "panel screw M5 x 12", "captive panel fastener M5 12 mm", "captive panel screw", "thread=M5; captive screw length=12 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M5x16"
title = "Captive panel screw M5 × 16 (envelope)"
params = { thread = "M5", length = 16 }
aliases = ["captive screw M5x16", "panel screw M5 x 16", "captive panel fastener M5 16 mm", "captive panel screw", "thread=M5; captive screw length=16 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M5x20"
title = "Captive panel screw M5 × 20 (envelope)"
params = { thread = "M5", length = 20 }
aliases = ["captive screw M5x20", "panel screw M5 x 20", "captive panel fastener M5 20 mm", "captive panel screw", "thread=M5; captive screw length=20 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M5x25"
title = "Captive panel screw M5 × 25 (envelope)"
params = { thread = "M5", length = 25 }
aliases = ["captive screw M5x25", "panel screw M5 x 25", "captive panel fastener M5 25 mm", "captive panel screw", "thread=M5; captive screw length=25 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"

[[presets]]
id = "M5x30"
title = "Captive panel screw M5 × 30 (envelope)"
params = { thread = "M5", length = 30 }
aliases = ["captive screw M5x30", "panel screw M5 x 30", "captive panel fastener M5 30 mm", "captive panel screw", "thread=M5; captive screw length=30 mm; simplified head/retainer envelope"]
standard = "step.parts captive panel screw model"