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BSPP End Fitting

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Nominal Size Walther Code ThreadSize (inch) Pitch (threads per inch)
Male Female OD ID
1/8" WR010 WR510 0.383 0.337 28
1/4" WR013 WR513 0.518 0.451 19
3/8" WR017 WR517 0.656 0.589 19
1/2" WR021 WR521 0.825 0.734 14
3/4" WR026 WR526 1.041 0.949 14
1" WR033 WR533 1.309 1.193 11
1-1/4" WR042 WR542 1.650 1.534 11
1-1/2" WR048 WR548 1.882 1.766 11
2" WR060 WR560 2.347 2.230 11
2-1/2" WR075 WR575 2.960 2.844 11
3 WR088 WR588 3.460 3.344 11
3-1/2" WR100 WR600 3.960 3.834 11
4 WR113 WR613 4.450 4.334 11
5 WR138 WR638 5.450 5.334 11
6 WR164 WR664 6.450 6.334 11

Walther code is WR for BSP, 0 or 1 for male thread, 5 or 6 for female, followed by the actual (not nominal) thread OD in mm.

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