| Diameter (inches) |
Threads per Inch (TPI) | |||
|---|---|---|---|---|
| BSW | UNC | UNF | BSF | |
| 1/8 | 40 | 40 | ||
| 5/32 | 32 | 32 | ||
| 3/16 | 24 | 24 | 32 | 32 |
| 1/4 | 20 | 20 | 28 | 26 |
| 5/16 | 18 | 18 | 24 | 22 |
| 3/8 | 16 | 16 | 24 | 20 |
| 7/16 | 14 | 14 | 20 | 18 |
| 1/2 | 12 | 13 | 20 | 16 |
| 5/8 | 11 | 11 | 18 | 14 |
| 3/4 | 10 | 10 | 16 | 12 |
| 7/8 | 9 | 9 | 14 | 11 |
| 1 | 8 | 8 | 12 | 10 |
| 1-1/8 | 7 | 7 | 12 | 9 |
| 1-1/4 | 7 | 7 | 12 | 9 |
| 1-1/2 | 6 | 6 | 12 | 8 |
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