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BSPP Form B

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BSPP Form B

Nominal Size Walther Code ThreadSize (inch) Pitch (threads per inch)
Male Female OD ID
3/8" WB017 WB517 0.656 0.589 19
1/2" WB021 WB521 0.825 0.734 14
3/4" WB026 WB526 1.041 0.949 14
1" WB033 WB533 1.309 1.193 11
1-1/4" WB042 WB542 1.650 1.534 11
1-1/2" WB048 WB548 1.882 1.766 11
2" WB060 WB560 2.347 2.231 11

Walther code is WB for BSP form B, 0 for male thread, 5 for female, followed by the actual (not nominal) thread OD in mm.

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