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Measuring British (BSP) Threads
| Metric Name |
BSP Name |
Actual Major Diameter in mm |
Actual Major Diameter in inches |
| 6mm |
1/8" |
9.728mm |
0.383" |
| 8mm |
1/4" |
13.157mm |
0.518" |
| 10mm |
3/8" |
16.662mm |
0.656" |
| 15mm |
1/2" |
20.995mm |
0.825" |
| 20mm |
3/4" |
26.441mm |
1.041" |
| 25mm |
1" |
33.249mm |
1.309" |
| 32mm |
1 1/4" |
41.91mm |
1.65" |
| 40mm |
1 1/2" |
47.803mm |
1.882" |
| 50mm |
2" |
59.614mm |
2.347" |
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