3 4 10 unc 2a July 8, 2019 16 32 64 128 3 4 10 unc 2a thread dimensions 3 4 10 unc 2a dimensions 3 4 10 unc 2a minor diameter 3 4 10 unc 2a major diameter 3/4 10 unc - 2a 3/4-10 unc thread 3 1/2-4 unc