Male Pipe Thread Sizes Return To Catalog 5/8" 1/2" 3/8" 1/4" -10 -8 -6 -4 1" 7/8" 3/4" -16 -14 -12 1-1/2" 1-1/4" -24 -20 O-Ring Face Seal (SAE J1453) FITTING END SIZE CHART