Gwint calowy BSW (standard brytyjski)
Gwinty są określone według normy angelskiej BS 84. Oznaczenie "BSW - British Standard Whitworth" tłumaczy się jako brytyjski gwint Whitworth'a. Gwint ten jest szeroko stosowany w Wielkiej Brytanii. Jego potoczna nazwa w Polsce to gwint gazowy. Znajduje zastosowanie przy produkcji armatury.
| Oznaczenie gwintu | Średnica zewnętrzna [cale] | Średnica zewnętrzna [mm] | Średnica wiertła [mm] |
TPI | Podziałka [mm] |
| BSW 1/16" | 1/16 | 1.587 | 1.15 | 60 | 0.423 |
| BSW 3/32" | 3/32 | 2.381 | 1.90 | 48 | 0.529 |
| BSW 1/8" | 1/8 | 3.175 | 2.50 | 40 | 0.635 |
| BSW 5/32" | 5/32 | 3.969 | 3.20 | 32 | 0.793 |
| BSW 3/16" | 3/16 | 4.762 | 3.70 | 24 | 1.058 |
| BSW 7/32" | 7/32 | 5.556 | 4.50 | 24 | 1.058 |
| BSW 1/4" | 1/4 | 6.350 | 5.10 | 20 | 1.270 |
| BSW 5/16" | 5/16 | 7.938 | 6.50 | 18 | 1.411 |
| BSW 3/8" | 3/8 | 9.525 | 7.90 | 16 | 1.588 |
| BSW 7/16" | 7/16 | 11.113 | 9.20 | 14 | 1.814 |
| BSW 1/2" | 1/2 | 12.700 | 10.40 | 12 | 2.117 |
| BSW 9/16" | 9/16 | 14.290 | 11.89 | 12 | 2.117 |
| BSW 5/8" | 5/8 | 15.876 | 13.40 | 11 | 2.309 |
| BSW 3/4" | 3/4 | 19.051 | 16.25 | 10 | 2.540 |
| BSW 7/8" | 7/8 | 22.226 | 19.25 | 9 | 2.822 |
| BSW 1" | 1 | 25.400 | 22.00 | 8 | 3.175 |
| BSW 1 1/8" | 1 1/8 | 28.576 | 24.50 | 7 | 3.629 |
| BSW 1 1/4" | 1 1/4 | 31.751 | 27.25 | 7 | 3.629 |
| BSW 1 3/8" | 1 3/8 | 34.926 | 30.25 | 6 | 4.233 |
| BSW 1 1/2" | 1 1/2 | 38.100 | 33.50 | 6 | 4.233 |
| BSW 1 5/8" | 1 5/8 | 41.277 | 35.50 | 5 | 5.080 |
| BSW 1 3/4" | 1 3/4 | 44.452 | 38.50 | 5 | 5.080 |
| BSW 1 7/8" | 1 7/8 | 47.627 | 41.25 | 4 1/2 | 5.645 |
| BSW 2" | 2 | 50.802 | 44.50 | 4 1/2 | 5.645 |
| BSW 2 1/4" | 2 1/4 | 57.152 | 50.00 | 4 | 6.350 |
| BSW 2 1/2" | 2 1/2 | 63.502 | 56.00 | 4 | 6.350 |
| BSW 2 3/4" | 2 3/4 | 69.853 | 61.50 | 3 1/2 | 7.257 |
| BSW 3" | 3 | 76.203 | 68.00 | 3 1/2 | 7.257 |
| BSW 3 1/4" | 3 1/4 | 82.553 | 73.75 | 3 1/4 | 7.816 |
| BSW 3 1/2" | 3 1/2 | 88.903 | 80.00 | 3 1/4 | 7.816 |
| BSW 3 3/4" | 3 3/4 | 95.254 | 85.50 | 3 | 8.467 |
| BSW 4" | 4 | 101.604 | 92.00 | 3 | 8.467 |
| BSW 4 1/4" | 4 1/4 | 107.954 | 98.00 | 2 7/8 | 8.835 |
| BSW 4 1/2" | 4 1/2 | 114.304 | 104.20 | 2 7/8 | 8.835 |
| BSW 4 3/4" | 4 3/4 | 120.665 | 110.00 | 2 3/4 | 9.237 |
| BSW 5" | 5 | 127.005 | 116.50 | 2 3/4 | 9.237 |
| BSW 5 1/4" | 5 1/4 | 133.355 | 122.50 | 2 5/8 | 9.677 |
| BSW 5 1/2" | 5 1/2 | 139.705 | 128.50 | 2 5/8 | 9.677 |
| BSW 5 3/4" | 5 3/4 | 146.055 | 134.50 | 2 1/2 | 10.160 |
| BSW 6" | 6 | 152.406 | 141.00 | 2 1/2 | 10.160 |