If the top of the thread is slightly truncated because the diameter is
a little less than the nominal diameter, the strength is almost the
same and the effort to cut the threads is greatly reduced. The
Machinery Handbook has tables with dimensions for various classes of
threads.

Dan


"Ryan" wrote in message news:7kEJb.148429$ss5.95526@clgrps13...
Thanks Roger Shoaf, that makes sense. I need to make it 5/16 x 32. Sounds
like that might workout because the diameter of the rod is .311 right now.