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BSP Threads: matches between inches and millimeters
The name BSP comes from the English: British Standard Pipe thread.
Also called "Pas Gaz", this thread is distinguished by its fine net.
Dimensions of BSP Threads
| Gaz | Old denomination | Female | Male | Number of nets per inch | Pas |
|---|---|---|---|---|---|
| 1/8" | 5-10 | 8,57 mm | 9,73 mm | 28 | 0,91 mm |
| 1/4" | 8-13 | 11,45 mm | 13,16 mm | 19 | 1,34 mm |
| 3/8" | 12-17 | 14,95 mm | 16,66 mm | 19 | 1,34 mm |
| 1/2" | 15-21 | 18,63 mm | 20,96 mm | 14 | 1,81 mm |
| 3/4" | 21-27 (20-27) | 24,12 mm | 26,44 mm | 14 | 1,81 mm |
| 1" | 26-34 | 30,29 mm | 33,25 mm | 11 | 2,31 mm |
| 1" 1/4 | 33-42 | 38,95 mm | 41,91 mm | 11 | 2,31 mm |
| 1" 1/2 | 40-49 | 44,84 mm | 47,80 mm | 11 | 2,31 mm |
| 1" 3/4 | 45-55 | 50,79 mm | 53,75 mm | 11 | 2,31 mm |
| 2" | 50-60 | 56,66 mm | 59,61 mm | 11 | 2,31 mm |
| 2" 1/4 | 60-66 (60-70) | 62,75 mm | 65,71 mm | 11 | 2,31 mm |
| 2" 1/2 | 66-76 | 72,23 mm | 75,18 mm | 11 | 2,31 mm |
| 2" 3/4 | 72-82 | 78,58 mm | 81,53 mm | 11 | 2,31 mm |
| 3" | 80-90 | 84,93 mm | 87,88 mm | 11 | 2,31 mm |
| 3" 1/2 | 90-102 | 97,37 mm | 100,33 mm | 11 | 2,31 mm |
| 4" | 102-114 | 110,07 mm | 113,03 mm | 11 | 2,31 mm |