Quote Originally Posted by RichardH View Post
I’m sure someone once said the secret to gun making was simple

“Start with a block of steel and machine away everything that doesn’t look like a gun”

It’s coming on great, what threads are you using?
Well Rich, I didn’t want to get too technical in my posts as it could have got a bit boring for most, so I left out this sort of detail. But I am happy to enlarge on anything that anyone might want me to.
When it comes to the threads, these were a bit arbitrary and were mostly BA for the smaller parts and metric for the larger ones. The cocking lever pivot pin and the screws for the cocking lever side links were 3BA. The metric thread for the cylinder end plugs needed to be quite fine because of the (relatively) thin cylinder wall and so I used M22 x 1. On the other hand the breech closure bolt needed a metric thread with a larger pitch, so that it took fewer turns to advance, and so I used M11 x 1.5.
It’s doubtful Lincoln Jeffries used any of these threads, but as there is no way of knowing what he used, I guess it doesn’t really matter.