Tap Drill Size Chart

12.5 mm Drill Size

metric drill

12.5 mm 0.4921 in 12.50 mm

A 12.5 mm drill is the standard tap drill for M14 x 1.5.

What a 12.5 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 12.5 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
M14 x 1.5 chart drill 77.0% 12.5 mm 77.0%
9/16-12 65.0% 31/64″ 72.1%
M14 x 2 57.7% 12 mm 77.0%

Drills either side

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12.5 mm drill: common questions

What size is a 12.5 mm drill?
0.4921 inches, which is 12.50 mm. It is a metric drill.
What can I tap with a 12.5 mm drill?
3 threads: M14 x 1.5 at 77.0%, 9/16-12 at 65.0%, M14 x 2 at 57.7%.
Is a 12.5 mm drill the standard tap drill for anything?
Yes, for M14 x 1.5 (77.0% thread). That is the size published tap and drill charts give.
What drill is next to a 12.5 mm?
Down: 12.4 mm at 0.4882 in. Up: 12.6 mm at 0.4961 in.