socket-head-cap-screw

// Socket Head Cap Screw
// This is for a #10-24 screw that is 1.00 inches long. A socket head cap screw is a type of fastener that is widely used in a variety of applications requiring a high strength fastening solution. It is characterized by its cylindrical head and internal hexagonal drive, which allows for tightening with an Allen wrench or hex key.

// Define constants
const screwLength = 1.000 // inch
const screwDiameter = .190 // inch
const headDiameter = .313 // inch
const headLength = screwDiameter // inch
const hexWallToWall = 5 / 32 //inch
const capRatio = screwDiameter / headDiameter
const hexRatio = hexWallToWall / headDiameter
const hexWallLength = hexWallToWall / 2 * (1 / cos(toRadians(30))) // inch
const hexStartingAngle = 210 // first angle of hex pattern (degrees)
const hexInteriorAngle = 120 // degrees
const hexChangeAngle = 180 - hexInteriorAngle // degrees

// Write a function that defines the Socket Head Cap Screw 
fn capScrew = (start, length, dia, capHeadLength) => {

  // Create the head of the cap screw
  const screwHeadSketch = startSketchOn('XZ')
  |> circle([start[0], start[1]], dia / capRatio / 2, %)

  // Extrude the screw head sketch
  const screwHead = extrude(capHeadLength, screwHeadSketch)

  // Define the sketch of the hex pattern on the screw head
  const hexPatternSketch = startSketchOn(screwHead, 'end')
    |> startProfileAt([hexWallToWall / 2, 0], %)
    |> yLine(-hexWallLength / 2, %)
    |> angledLine({
      angle: hexStartingAngle,
      length: hexWallLength,
    }, %)
    |> angledLine({
      angle: hexStartingAngle - hexChangeAngle,
      length: hexWallLength,
    }, %)
    |> angledLine({
      angle: hexStartingAngle - 2 * hexChangeAngle,
      length: hexWallLength
    }, %)
    |> angledLine({
      angle: hexStartingAngle - 3 * hexChangeAngle,
      length: hexWallLength
    }, %)
    |> angledLine({
      angle: hexStartingAngle - 4 * hexChangeAngle,
      length: hexWallLength,
    }, %)
  |> close(%)
  
  const hexPattern = extrude(-headLength * 0.75, hexPatternSketch)


  const screwBodySketch = startSketchOn(screwHead, "start")
  |> circle([start[0], start[1]], dia / 2, %)
  
  const screwBody = extrude(length, screwBodySketch)
  return screwBody
}

capScrew([0, 0], screwLength, screwDiameter, screwDiameter)