Summary

OpenSCAD library for British Standard bolts and nuts with exact Whitworth profile.
It can generate threads alone or in a bolt/screw or nut.

The library allows to generate STL for threads from BSW 1/16" to BSW 4" and from BSF 3/16" to BSF 4". They can be generated alone or as part of another design.

The STL for BSW 1/4", BSW 3/8" (aka Congres), BSF 1/4" and BSF 3/8" bolts and nuts are provided in thing files to show the results.

List of predefined threads

• This list can be extended with the API
• Available in standard coarse (BSW) and fine (BSF) threads
  BSW 1/16, BSW 3/32,
  BSW 1/8, BSW 5/32, BSW 3/16, BSW 7/32,
  BSW 1/4, BSW 5/16, BSW 3/8, BSW 7/16,
  BSW 1/2, BSW 9/16, BSW 5/8, BSW 3/4, BSW 7/8,
  BSW 1, BSW 1 1/18, BSW 1 1/4, BSW 1 3/8,
  BSW 1 1/2, BSW 1 5/8, BSW 1 3/4, BSW 1 7/8,
  BSW 2, BSW 2 1/4, BSW 2 1/2, BSW 2 3/4,
  BSW 3, BSW 3 1/4, BSW 3 1/2, BSW 3 3/4,
  BSW 4

Howto

Sample OpenSCAD file to render a 1/4" bolt in BSW standard:

    use <agentscad/bsw-screw.scad>    use <agentscad/bsw-thread.scad>    $fn=100;    bswBoltHexagonalThreaded( BSW1_4() );

Sample OpenSCAD file to render a 1/4" bolt in BSF standard:

    use <agentscad/bsf-screw.scad>    use <agentscad/bsf-thread.scad>    $fn=100;    bsfBoltHexagonalThreaded( BSF1_4() );

Documentation

Detailed documentation available on GitHub Wiki

See also

• Metric libs
• UNC / UNF libs