1 20 tpi thread July 8, 2019 16 32 64 128 1 2 20 tpi thread 1 4 20 tpi thread 1 x 20 tpi thread 1 2 x 20 tpi thread 1 4 x 20 tpi thread 1 4 unc 20 tpi thread 20 tpi thread 6 tpi square thread Thread 1/2-20
