Whitworth Threads (BSW) Unit: mm Parallel Pipe Threads G(BSP) Unit: mm
| Size | | Class | Major diameter | Pit | ch Diame Uer | ter Lower | Minor diameter | Size | Class | Major diameter | Pi | tch Diame Uer | ter Lower | Minor diameter |
| | | | Basic Size | Basic Size | pp Tolerance (μm) + | Tolerance (μm) + | Basic Size | | | Basic Size | Basic Size | pp Toleranc (μm) + | e Toleranc (μm) + | e Basic Size |
| 1/8 | W | 40 | P1 | 3.175 | 2.768 | 25 | 10 | 2.362 | G 1/8 - 28 | - | 9.728 | 9.147 | 43 | 21 | 8.566 |
| 5/32 | W | 32 | P2 | 3.969 | 3.460 | 40 | 20 | 2.952 | G 1/4 - 19 | - | 13.157 | 12.301 | 50 | 25 | 11.445 |
| 3/16 | W | 24 | P2 | 4.762 | 4.085 | 40 | 20 | 3.407 | G 3/8 - 19 | - | 16.662 | 15.806 | 50 | 25 | 14.950 |
| 7/32 | W | 24 | P2 | 5.556 | 4.879 | 40 | 20 | 4.201 | G 1/2 - 14 | - | 20.955 | 19.793 | 57 | 28 | 18.631 |
| 1/4 | W | 20 | P2 | 6.350 | 5.537 | 40 | 20 | 4.724 | G 5/8 - 14 | - | 22.911 | 21.749 | 57 | 28 | 20.587 |
| 5/16 | W | 18 | P2 | 7.938 | 7.034 | 40 | 20 | 6.130 | G 3/4 - 14 | - | 26.441 | 25.279 | 57 | 28 | 24.117 |
| 3/8 | W | 16 | P2 | 9.525 | 8.509 | 40 | 20 | 7.493 | G 7/8 - 14 | - | 30.201 | 29.039 | 57 | 28 | 27.877 |
| 7/16 | W | 14 | P3 | 11.112 | 9.950 | 60 | 40 | 8.788 | G 1 - 11 | - | 33.249 | 31.770 | 72 | 36 | 30.291 |
| 1/2 | W | 12 | P3 | 12.700 | 11.345 | 60 | 40 | 9.990 | G 1 1/4 - 11 | - | 41.910 | 40.431 | 72 | 36 | 38.952 |
| 9/16 | W | 12 | P3 | 14.288 | 12.933 | 60 | 40 | 11.578 | G 1 1/2 - 11 | - | 47.803 | 46.324 | 72 | 36 | 44.845 |
| 5/8 | W | 11 | P3 | 15.875 | 14.396 | 60 | 40 | 12.917 | | | | | | | |
| 3/4 | W | 10 | P3 | 19.050 | 17.424 | 60 | 40 | 15.798 | Plll Pi Thd | F(G) | | | | | Uit |
| 7/8 | W | 9 | P3 | 22.225 | 20.418 | 60 | 40 | 18.611 | arae pe reas | | | | | | n: m |
| 1 | W | 8 | P3 | 25.400 | 23.367 | 60 | 20 | 21.334 | | | Major diameter | Pi | tch Diame | ter | Minor diameter |
| 1 1/8 | W | 7 | P4 | 28.575 | 26.252 | 80 | 40 | 23.929 | Size | Class | Bi | Bi | Upper | Lower | Bi |
| 1 1/4 | W | 7 | P4 | 31.750 | 29.427 | 80 | 40 | 27.104 | | | asc Size | asc Size | Toleranc (μm) + | e Toleranc (μm) + | e asc Size |
| 1 3/8 | W | 6 | P4 | 34.925 | 32.214 | 80 | 40 | 29.503 | PF 1/16 - 28 | II | 7.723 | 7.142 | 40 | 20 | 6.561 |
| 1 1/2 | W | 6 | P4 | 38.100 | 35.389 | 80 | 40 | 32.678 | PF 1/8 - 28 | II | 9.728 | 9.147 | 40 | 20 | 8.566 |
| 1 5/8 | W | 5 | P4 | 41.275 | 38.022 | 80 | 40 | 34.769 | PF 1/4 - 19 | II | 13.157 | 12.301 | 50 | 25 | 11.445 |
| 1 3/4 | W | 5 | P4 | 44.450 | 41.197 | 80 | 40 | 37.944 | PF 3/8 - 19 | II | 16.662 | 15.806 | 50 | 25 | 14.950 |
| 1 7/8 2 | W W | 4.5 4.5 | P4 P4 | 47.625 50.800 | 44.011 47.186 | 80 80 | 40 40 | 40.397 43.572 | PF 1/2 - 14 | II | 20.955 | 19.793 | 55 | 25 | 18.631 |
SL
| Size | Class | Major diameter Basic Size | Pit Basic Size | ch Diamet Upper Tolerance (μm) + | er Lower Tolerance (μm) + | Minor diameter Basic Size |
| PF 1/16 - 28 | II | 7.723 | 7.142 | 40 | 20 | 6.561 |
| PF 1/8 - 28 | II | 9.728 | 9.147 | 40 | 20 | 8.566 |
| PF 1/4 - 19 | II | 13.157 | 12.301 | 50 | 25 | 11.445 |
| PF 3/8 - 19 | II | 16.662 | 15.806 | 50 | 25 | 14.950 |
| PF 1/2 - 14 | II | 20.955 | 19.793 | 55 | 25 | 18.631 |
| PF 5/8 - 14 | II | 22.911 | 21.749 | 55 | 25 | 20.587 |
| PF 3/4 - 14 | II | 26.441 | 25.279 | 55 | 25 | 24.117 |
| PF 7/8 - 14 | II | 30.201 | 29.039 | 55 | 25 | 27.877 |
| PF 1 - 11 | II | 33.249 | 31.770 | 60 | 30 | 30.291 |
| PF 1 1/4 - 11 | II | 41.910 | 40.431 | 65 | 30 | 38.952 |
| PF 1 1/2 - 11 | II | 47.803 | 46.324 | 65 | 30 | 44.845 |
| PF 2 - 11 | II | 59.614 | 58.135 | 75 | 35 | 56.656 |
| PF 2 1/2 - 11 | II | 75.184 | 73.705 | 80 | 40 | 72.226 |
| PF 3 - 11 | II | 87.884 | 86.405 | 85 | 40 | 84.926 |
| PF 3 1/2 - 11 | II | 100.330 | 98.851 | 85 | 40 | 97.372 |
| PF 4 - 11 | II | 113.030 | 111.551 | 85 | 40 | 110.072 |
LONG
| Size | Major Diameter Basic Size | Pitch Diameter Basic Size | Minor Diameter Basic Size |
| PT | 1/16 - 28 | 7.723 | 7.142 | 6.561 |
| PT | 1/8 - 28 | 9.728 | 9.147 | 8.566 |
| PT | 1/4 - 19 | 13.157 | 12.301 | 11.445 |
| PT | 3/8 - 19 | 16.662 | 15.806 | 14.950 |
| PT | 1/2 - 14 | 20.955 | 19.793 | 18.631 |
| PT | 5/8 - 14 | 22.911 | 21.749 | 20.587 |
| PT | 3/4 - 14 | 26.441 | 25.279 | 24.117 |
| PT | 7/8 - 14 | 30.201 | 29.039 | 27.877 |
| PT | 1 - 11 | 33.249 | 31.770 | 30.291 |
| PT | 1 1/8 - 11 | 37.897 | 36.418 | 34.939 |
| PT | 1 1/4 - 11 | 41.910 | 40.431 | 38.952 |
| PT | 1 1/2 - 11 | 47.803 | 46.324 | 44.845 |
| PT | 1 3/4 - 11 | 53.746 | 52.267 | 50.788 |
| PT | 2 - 11 | 59.614 | 58.135 | 56.656 |
| PT | 2 1/4 | 65.710 | 64.231 | 62.752 |
| PT | 2 1/2 | 75.184 | 73.705 | 72.226 |
| PT | 3 - 11 | 87.884 | 86.405 | 84.926 |
| PT | 3 1/2 | 100.330 | 98.851 | 97.372 |
| PT | 4 - 11 | 113.030 | 111.551 | 110.072 |
| Size | Class | Major diameter Basic Size | Pit Basic Size | ch Diamet Upper Tolerance (μm) + | er Lower Tolerance (μm) + | Minor diameter Basic Size |
| PS 1/16 - 28 | II | 7.723 | 7.142 | 30 | 50 | 6.561 |
| PS 1/8 - 28 | II | 9.728 | 9.147 | 30 | 50 | 8.566 |
| PS 1/4 - 19 | II | 13.157 | 12.301 | 50 | 75 | 11.445 |
| PS 3/8 - 19 | II | 16.662 | 15.806 | 50 | 75 | 14.950 |
| PS 1/2 - 14 | II | 20.955 | 19.793 | 85 | 115 | 18.631 |
| PS 5/8 - 14 | II | 22.911 | 21.749 | 85 | 115 | 20.587 |
| PS 3/4 - 14 | II | 26.441 | 25.279 | 85 | 115 | 24.117 |
| PS 7/8 - 14 | II | 30.201 | 29.039 | 85 | 115 | 27.877 |
| PS 1 - 11 | II | 33.249 | 31.770 | 120 | 150 | 30.291 |
| PS 1 1/4 - 11 | II | 41.910 | 40.431 | 115 | 150 | 38.952 |
| PS 1 1/2 - 11 | II | 47.803 | 46.324 | 115 | 150 | 44.845 |
| PS 2-11 | II | 59.614 | 58.135 | 105 | 145 | 56.656 |
| PS 2 1/2 - 11 | II | 75.184 | 73.705 | 140 | 180 | 72.226 |
| PS 3 - 11 | II | 87.884 | 86.405 | 135 | 180 | 84.926 |
| PS 4 - 11 | II | 113.030 | 111.551 | 135 | 180 | 110.072 |
info PS 4 - 11 II 113.030 111.551 135 180 110.072
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