12 mm Drill Size

metric drill

12 mm 0.4724 in 12.00 mm

A 12 mm drill is the standard tap drill for M14 x 2.

What a 12 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 12 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
9/16-12	83.2%	31/64″	72.1%
M14 x 2 chart drill	77.0%	12 mm	77.0%
1/2-28	59.5%	15/32″	67.2%

Drills either side

15/32″ 0.4688 in · 11.91 mm Next size down
12.1 mm 0.4764 in · 12.1 mm Next size up

All drill sizes → · Open this drill in the calculator →

12 mm drill: common questions

What size is a 12 mm drill?

0.4724 inches, which is 12.00 mm. It is a metric drill.

What can I tap with a 12 mm drill?

3 threads: 9/16-12 at 83.2%, M14 x 2 at 77.0%, 1/2-28 at 59.5%.

Is a 12 mm drill the standard tap drill for anything?

Yes, for M14 x 2 (77.0% thread). That is the size published tap and drill charts give.

What drill is next to a 12 mm?

Down: 15/32 in at 0.4688 in. Up: 12.1 mm at 0.4764 in.