#11 Drill Size

number drill

#11 0.191 in 4.85 mm

A #11 drill measures 0.191 in. It taps 2 threads in this chart.

What a #11 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 #11 drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
#12-32	61.6%	#13	76.4%
#12-28	53.9%	#14	73.3%

Other jobs for a #11

Hard-material tap drill: The size to use in stainless or tool steel for #12-32, where it leaves a shallower thread than the standard drill and cuts tapping torque.

Drills either side

4.8 mm 0.189 in · 4.8 mm Next size down
4.9 mm 0.1929 in · 4.9 mm Next size up

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

#11 drill: common questions

What size is a #11 drill?

0.191 inches, which is 4.85 mm. It is a number drill.

What can I tap with a #11 drill?

2 threads: #12-32 at 61.6%, #12-28 at 53.9%.

What drill is next to a #11?

Down: 4.8 mm at 0.189 in. Up: 4.9 mm at 0.1929 in.