Posted by David W on September 8, 2008, 5:28 pm, in reply to "Re: Bushings"
Bob, Someone had taken 5/16"-32 Allen head cap screws and was going to make his own. The thread size is 32 tpi and the od. is .307. So if you can find a Grade 2 bolt in 5/16"-32 you would be fine. The captive screw are 8-32 according to Brophy's book. They are called "firing pin check screw" if I am looking at the right thing. They are made of soft steel.
If you are thinking of making your own and need the specs drop me an email.
The captive screws in one that I have looks to be made of copper. Maybe it's beryllium copper as copper itself is too soft.