Wildcat hammerspring screw

Looking for a nut to thread it into. The threads on my stock one are buggered up. I cleaned them up but don’t want to damage the threads in my gun.  So looking in McMaster Carr, I can find M16x1.5. U suppose that is what it is?

Nope, it's 16x1. The above post about the Banjo bolt is pretty much the only "aftermarket" bolt I could find also.