Tap Drill Size Chart

10.5 mm Drill Size

metric drill

10.5 mm 0.4134 in 10.50 mm

A 10.5 mm drill is the standard tap drill for M12 x 1.5.

What a 10.5 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.

Threads a 10.5 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
M12 x 1.5 chart drill 77.0% 10.5 mm 77.0%
M12 x 1.75 66.0% 10.2 mm 79.2%
7/16-28 51.9% Y 72.2%

Drills either side

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10.5 mm drill: common questions

What size is a 10.5 mm drill?
0.4134 inches, which is 10.50 mm. It is a metric drill.
What can I tap with a 10.5 mm drill?
3 threads: M12 x 1.5 at 77.0%, M12 x 1.75 at 66.0%, 7/16-28 at 51.9%.
Is a 10.5 mm drill the standard tap drill for anything?
Yes, for M12 x 1.5 (77.0% thread). That is the size published tap and drill charts give.
What drill is next to a 10.5 mm?
Down: Z at 0.413 in. Up: 10.6 mm at 0.4173 in.