I know this is a bastard size that falls between the FINE and COARSE definitions, but it is the thread size for the grip retention screws on original German Luger pistols. 3/16" x 30 TPI Whitworth 55 degree threads.
The threaded shank is only THREE to FOUR threads long, so any length greater than 0.1 inch would work since I could grind them down.
I looked at McMaster and Fastenal, and couldn't find anything close.
Anyone know of a source for such screws? Just as important is a source for a tap to chase the threads with?
Thanks for your help in advance.
P.S. I also posted this request on the PM Board...