Stealth Pilot wrote:


Fun fun. (the part is made, with 1/8" drill rod and 4-40 threads).

are the threads 55degree angle or 60 degree angle?

eighth inch whitworth is 40 tpi

1/8" British Standard Cycle thread is also 40 tpi, but is 60 degree
rather than Whitworth's 55 deg thread form.

Jordan