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Clearance and drill sizes for .0001 flush screw counterbores.
| Metric | A | B | C | D | English Equivalent |
|---|---|---|---|---|---|
| M3 X .5 | .250 1/4" | .156 5/32" | .098 #40" | .150 | #5-40 |
| M4 X .7 | .312 1/4" | .196 #9 | .128 #30 | .190 | #8-32 |
| M5 X .8 | .368 U" | .228 #1 | .166 #19 | .230 | #10-32 |
| M6 X 1 | .442 27/64" | .266 H | .128 #30 | .190 | #8-32 |
| M8 X .125 | .547 35/64" | .348 #5 | .265 1764" | .350 | 5/16"-18 |
| M10 X 1.5 | .656 21/32" | .422 27/64" | .332 Q | .420 | 3/8"-16 |
| M12 X 1.5 | .750 3/4" | .5 1/2" | .404 Y | .5 | 1/2"-13 |
| M16 X 2 | .984 63/64" | .672 43/64" | .547 35/64" | .660 | 5/8"-11 |
| M20 X 2.5 | 1.216 1-7/32" | .812 13/16" | .668 11/16" | .820 | 3/4"-10 |
