| SCREW GAGE NUMBER | SHANK HOLE HARD & SOFT WOOD | PILOT HOLE SOFT WOOD | PILOT HOLE HARD WOOD |
| 0 1 2 3 4 5 6 7 8 9 10 11 12 14 16 18 20 | 1/16″ 5/64″ 3/32 7/64″ 7/64″ 1/8″ 9/64″ 5/32″ 11/64″ 3/16″ 3/16″ 13/64″ 7/32″ 1/4″ 17/64″ 19/64″ 21/64″ | 1/64″ 1/32″ 1/32″ 3/64″ 3/64″ 1/16″ 1/16″ 1/16″ 5/64″ 5/64″ 3/32″ 3/32″ 7/64″ 7/64″ 9/64″ 9/64″ 11/64″ | 1/32″ 1/32″ 3/64″ 1/16″ 1/16″ 5/64″ 5/64″ 3/32″ 3/32″ 7/64″ 7/64″ 1/8″ 1/8″ 9/64″ 5/32″ 3/16″ 13/64″ |
 |  |  | © 2006-2017, Creative Assembly Systems, Inc. |