// bolt.crd — hex bolt with cross slot

let head: Obj = 6-gon(3)
let dome: Obj = translate(sphere(3.2), 0, 0, 1.5)
let cap: Obj = intersect(head, dome)

let shaft: Obj = cylinder(1.2, 8)
let bolt: Obj = union(translate(cap, 0, 0, 8), shaft)

let slot: Obj = box(0.4, 3, 10)
let slot2: Obj = rotate_z(slot, pi/2)
let cross: Obj = union(slot, slot2)

let result: Obj = diff(bolt, cross)
cast(result)