10.9 mm Drill Size
metric drill
10.9 mm 0.4291 in 10.90 mm
A 10.9 mm drill measures 0.4291 in. It taps 4 threads in this chart.
What a 10.9 mm drill taps
Every thread this drill cuts between 50% and 85% of thread, deepest first. Outside that band it is the wrong drill for the job, so nothing below that line is listed.
| Thread | % thread | Chart drill | Chart % |
|---|---|---|---|
| M12 x 1 | 84.7% | 11 mm | 77.0% |
| 1/2-13 | 71.0% | 27/64″ | 78.2% |
| M12 x 1.25 | 67.7% | 10.8 mm | 73.9% |
| M12 x 1.5 | 56.5% | 10.5 mm | 77.0% |
Drills either side
10.9 mm drill: common questions
What size is a 10.9 mm drill?
0.4291 inches, which is 10.90 mm. It is a metric drill.
What can I tap with a 10.9 mm drill?
4 threads: M12 x 1 at 84.7%, 1/2-13 at 71.0%, M12 x 1.25 at 67.7%, M12 x 1.5 at 56.5%.
What drill is next to a 10.9 mm?
Down: 10.8 mm at 0.4252 in. Up: 11 mm at 0.4331 in.