2.2 mm Drill Size

metric drill

2.2 mm 0.0866 in 2.20 mm

A 2.2 mm drill measures 0.0866 in. It taps 3 threads in this chart.

What a 2.2 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 2.2 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
#4-40	78.2%	#43	70.8%
#3-56	53.5%	#45	73.3%
M2.5 x 0.45	51.3%	2.05 mm	77.0%

Drills either side

#44 0.086 in · 2.18 mm Next size down
#43 0.089 in · 2.26 mm Next size up

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

2.2 mm drill: common questions

What size is a 2.2 mm drill?

0.0866 inches, which is 2.20 mm. It is a metric drill.

What can I tap with a 2.2 mm drill?

3 threads: #4-40 at 78.2%, #3-56 at 53.5%, M2.5 x 0.45 at 51.3%.

What drill is next to a 2.2 mm?

Down: #44 at 0.086 in. Up: #43 at 0.089 in.