Tap Drill Size Chart

12.7 mm Drill Size

metric drill

12.7 mm 0.500 in 12.70 mm

A 12.7 mm drill measures 0.500 in. It taps 4 threads in this chart.

What a 12.7 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 12.7 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 1.25 80.1% 12.8 mm 73.9%
M14 x 1.5 66.7% 12.5 mm 77.0%
9/16-12 57.7% 31/64″ 72.1%
M14 x 2 50.0% 12 mm 77.0%

Drills either side

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12.7 mm drill: common questions

What size is a 12.7 mm drill?
0.500 inches, which is 12.70 mm. It is a metric drill.
What can I tap with a 12.7 mm drill?
4 threads: M14 x 1.25 at 80.1%, M14 x 1.5 at 66.7%, 9/16-12 at 57.7%, M14 x 2 at 50.0%.
What drill is next to a 12.7 mm?
Down: 1/2 in at 0.500 in. Up: 12.8 mm at 0.5039 in.