Historical
ANSI/ASME B94.9-1999
Taps, Cut and Ground Threads
Covers various designs of taps, nomenclature, and definitions, the standard system of marking, and dimensions and tolerance tables for Stand Straight Thread, Pipe-Taper Thread, Pipe-Straight Thread, Pulley, Screw Thread Insert, and Thread Forming Taps.
American Society of Mechanical Engineers [asme]