... the pitch diameter of a thread based on a measurement with three wires.
Supports the threading standards M, G, R, BSW, BSF, UNC, UNF, UNEF and tapered Pipe R/Rc and Metrical threads. New: NPSM, NPT, NPTF, NPSC, NPSF.
Includes an improved version of the Mach3 M1076.m1s threading macro and a matching screenset.
Try also the Feed Calculator: www.sourceforge.net/p/feedcalculator