Mystery thread
Posted: 13 Oct 2021, 17:21
I’ve been asked to repair one or two of these wingbolts, fitted to the tripod legs of a wartime trench periscope/telescope:
A couple have snapped off at the recessed portion.
The thread diameter is 0.245”, and it’s 30 TPI, which my lathe can’t do. Any ideas what the thread might be so I can get the right die?
A couple have snapped off at the recessed portion.
The thread diameter is 0.245”, and it’s 30 TPI, which my lathe can’t do. Any ideas what the thread might be so I can get the right die?