OK, I've got a good one for the gunsmiths out there. I have a .38 S%W Iver Johnson Break-Top that is in need of a firing pin "bushing". Have new (?) bushing but it looks like the threads in the reciever are a bit burred. My question: Whats the thread count & pitch on these little devils? It looks like the thread count is 44 but I'm having a hard time verifying that. All help is greatly appreciated!!
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Iver Johnson Help!
- Thread starter bop
- Start date
Get a thread pitch gauge, then there's no guessing.
http://www.brownells.com/.aspx/pid=7666/Product/STRAIGHT-THREAD-PITCH-GAUGE
http://www.brownells.com/.aspx/pid=7666/Product/STRAIGHT-THREAD-PITCH-GAUGE
smoakingun
New member
the best/easiest way to determine the pitch is with a pitch guage.
smoakingun
New member
be careful with that tap. In the world of firearms, they use some non standard threads. check with someplace like brownells to see if they carry an industry specific pitch guage