Re: Formula that will calculate the NoGo Major Diameter of an M20 x 1.5 6H Thread gag
The basic major diameter of a NO GO plug for any metric M-Thread is the basic pitch diameter of the NO GO member plus 0.2p, e.g.
19.216+0.2*1.5=19.516 mm
Tolerance is on a sliding scale with basic size and pitch, and is applied minus. For this case, the tolerance is 0.015 mm.
Values are found in ANSI/ASME B1.16M