Machine Screw Guide (for Metal)
The chart below will give the user the various dimensions for Machine screws. All dimensions are in inches. The shank pilot hole is the one which will clear the thickest part of the screw body.
| Screwgauge | Body dia. | Thru Hole In Metal |
| 0 | 0.060 | 0.075 |
| 1 | 0.073 | 0.088 |
| 2 | 0.086 | 0.100 |
| 3 | 0.099 | 0.114 |
| 4 | 0.112 | 0.127 |
| 5 | 0.125 | 0.140 |
| 6 | 0.138 | 0.152 |
| 7 | 0.151 | 0.166 |
| 8 | 0.164 | 0.181 |
| 9 | 0.177 | 0.192 |
| 10 | 0.190 | 0.205 |
| 11 | 0.203 | 0.218 |
| 12 | 0.216 | 0.230 |
| 1/4 | 0.250 | 0.265 |
| 5/16 | 0.312 | 0.327 |
| 3/8 | 0.375 | 0.390 |
| 1/2 | 0.500 | 0.515 |