Unc 1-8 thread July 8, 2019 16 32 64 128 1'' 8 unc thread 1 8 unc internal thread dimensions 1 8 unc threaded rod 1 -8 unc thread diameter 1 -8 unc thread tap 1 8 unc thread gauge 1 7 8 unc thread pitch 1 3 8 unc thread dimensions 1 5 8 unc thread dimensions 1 3 8 unc thread 1 5 8 unc thread 1 7 8 unc thread dimensions