Major Thread Diameter
| Size | Decimal | Nearest Fractional Measurement |
| #0 | .060″ | 1/16″ |
| #1 | .073″ | 5/64″ |
| #2 | .086″ | 3/32″ |
| #3 | .099″ | 7/64″ |
| #4 | .112″ | 7/64″ |
| #5 | .125″ | 1/8″ |
| #6 | .138″ | 9/64″ |
| #7 | .151″ | 5/32″ |
| #8 | .164″ | 5/32″ |
| #9 | .177″ | 11/64″ |
| #10 | .190″ | 3/16″ |
| #11 | .203″ | 13/64″ |
| #12 | .216″ | 7/32″ |
| #14 | .242″ | 1/4″ |
| #16 | .268″ | 17/64″ |
| #18 | .294″ | 19/64″ |
| #20 | .320″ | 5/16″ |