G/R/RP-Withworth thread (BSPP/BSPT) - Teesing
Male thread size (inch) Female thread size (inch) Major diameter (mm) Minor diameter (mm) TPI: R 1/16' Rp 1/16' 7,723: 6,490: 28: R 1/8' Rp 1/8' 9,728: 8,495: 28: R 1/4' Rp 1/4' 13,157: 11,341: 19: R 3/8' Rp 3/8' 16,662: 14,846: 19: R 1/2' Rp 1/2' 20,955: 18,489: 14: R3/4' Rp 3/4' 26,441: 23,975: 14: R 1' Rp 1' 33,249: 30,111: 11: R2' Rp 2' 59,614: 56,476: 11
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