grim_d
Unlikeable idiot.
- Messages
- 4,218
- Location
- Scotland - Ayrshire
Evening,
So I need to make a new backplate for a smaller 4 jaw. I've had a couple practices at making the threads on some delrin almost successfully, but I digress...
The threads are 2 1/4 x 6tpi, but are they whitworth or UN?
I know it doesn't really matter since the tolerances make them almost interchangeable but I'm curious , the root and crest look rounded like a whitworth but could just be worn.
So anyone know if Harrison was using whitworth still with the l5 or UN?
So I need to make a new backplate for a smaller 4 jaw. I've had a couple practices at making the threads on some delrin almost successfully, but I digress...
The threads are 2 1/4 x 6tpi, but are they whitworth or UN?
I know it doesn't really matter since the tolerances make them almost interchangeable but I'm curious , the root and crest look rounded like a whitworth but could just be worn.
So anyone know if Harrison was using whitworth still with the l5 or UN?