Some state libraries and local chapters of ASME maintain reference copies.
These screws feature slots or cutting edges at the point, designed to act like a tap, removing chips from the hole. asme b1864 pdf
: Covers flat countersunk (82° and 100°), oval, pan, fillister, hex, and truss heads. Some styles, like the Truss Head Some state libraries and local chapters of ASME
: For actual hardware compliant with these specs, retailers like McMaster-Carr FCH Sourcing Network list products still manufactured to B18.6.4 dimensions. Screw Types Covered designed to act like a tap