| Size Number | Major Thread Diameter* | |
| Decimal | Nearest Fractional Measurement | |
| #0 | 0.060 | 1/16 |
| #1 | 0.073 | 5/64 |
| #2 | 0.086 | 3/32 |
| #3 | 0.099 | 7/64 |
| #4 | 0.112 | 7/64 |
| #5 | 0.125 | 1/8 |
| #6 | 0.138 | 9/64 |
| #7 | 0.151 | 5/32 |
| #8 | 0.164 | 5/32 |
| #9 | 0.177 | 11/64 |
| #10 | 0.190 | 3/16 |
| #11 | 0.203 | 13/64 |
| #12 | 0.216 | 7/32 |
| #14 | 0.242 | 1/4 |
| #16 | 0.268 | 17/64 |
| #18 | 0.294 | 19/64 |
| #20 | 0.320 | 5/16 |
* The major thread diameter is measured on the outside of the threads
