Thread man
Well-Known Member
Maybe the easiest way to find the thread depth on any Whitworth profile thread (55º) is simply to multiply the pitch (in decimals) by 0.640327 (0.64 should be accurate enough for most ☺) The 0.64 applies to threads that have the correct radii.
The correct radius is 0.137329 times pitch. Personally I'd use 0.14.
The thread depth for H is 0.96 times pitch.
The correct radius is 0.137329 times pitch. Personally I'd use 0.14.
The thread depth for H is 0.96 times pitch.