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The diameter and pilot drill size versus wood screw gauge.
| Gauge Number | Diameter mm | Pilot Drill mm | Gauge Number | Diameter mm | Pilot Drill mm |
|
|
|
7 | 3.81 | 2.3 |
| 0 | 1.6 |
|
8 | 4.17 | 2.4 |
| 1 | 1.78 |
|
9 | 4.52 | 2.6 |
| 2 | 2.08 | 10 | 4.88 | 2.8 | |
| 3 | 2.39 | 1.5 | 12 | 5.59 | 3.2 |
| 4 | 2.74 | 1.6 | 14 | 6.30 | 3.5 |
| 5 | 3.10 | 1.8 | 16 | 7.01 | 3.8 |
| 6 | 4.064 | 2.1 | 18 | 7.72 | 4.2 |