(10,11) However, there are no studies that indicate whether a particular screw diameter or screw thread
type provides a more stable construct.
Lead of thread: The lead of thread is the distance a screw thread
advances axially in one complete turn.
Acme screw threads
are manufactured for assemblies that require the carrying of heavy loads.
It may pay off to learn more about screw threads
and the necessary torque for various screw threads
in a variety of applications.
Slightly enlarge and deepen the holes (Photo 4), but keep the holes narrow and shallow enough so the screw threads
can bite into plenty of wood.
The .150-50 grip screw threads
are .012 inch from root to crown and the .236-60 grip bushing threads are .009 inch from root to crown, so you can imagine how easily these threads can get over-torqued to the point they fail to do their duty.
There is ample screw thread
depth into the receiver just above the top extractor groove of the receiver.