| Screw Guage | Head Bore | Shank Hole | Pilot Hole | Pilot Hole |
| HW* | SW* | |||
| #2 | 11/64 | 3/32 | 1/16 | 1/16 |
| #3 | 13/64 | 7/64 | 1/16 | 1/16 |
| #4 | 15/64 | 7/64 | 5/64 | 1/16 |
| #5 | 1/4 | 1/8 | 5/64 | 1/16 |
| #6 | 9/32 | 9/64 | 3/32 | 5/64 |
| #7 | 5/16 | 5/32 | 7/64 | 3/32 |
| #8 | 11/32 | 5/32 | 7/64 | 3/32 |
| #9 | 23/64 | 11/64 | 1/8 | 7/64 |
| #10 | 25/64 | 3/16 | 1/8 | 7/64 |
| #12 | 7/16 | 7/32 | 9/64 | 1/8 |
| #14 | 1/2 | 1/4 | 5/32 | 9/64 |