#10 Drill Size

number drill

#10 0.1935 in 4.92 mm

A #10 drill measures 0.1935 in. It taps 2 threads in this chart.

What a #10 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 drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
M6 x 1	83.5%	5 mm	77.0%
#12-32	55.4%	#13	76.4%

Drills either side

4.9 mm 0.1929 in · 4.9 mm Next size down
#9 0.196 in · 4.98 mm Next size up

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

#10 drill: common questions

What size is a #10 drill?

0.1935 inches, which is 4.92 mm. It is a number drill.

What can I tap with a #10 drill?

2 threads: M6 x 1 at 83.5%, #12-32 at 55.4%.

What drill is next to a #10?

Down: 4.9 mm at 0.1929 in. Up: #9 at 0.196 in.