2.15 mm Drill Size

metric drill

2.15 mm 0.0846 in 2.15 mm

A 2.15 mm drill measures 0.0846 in. It taps 4 threads in this chart.

What a 2.15 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 2.15 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	84.4%	#43	70.8%
#3-56	62.1%	#45	73.3%
M2.5 x 0.45	59.9%	2.05 mm	77.0%
#3-48	53.2%	#47	75.7%

Other jobs for a 2.15 mm

Hard-material tap drill: The size to use in stainless or tool steel for M2.5 x 0.45, where it leaves a shallower thread than the standard drill and cuts tapping torque.

Drills either side

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

2.15 mm drill: common questions

What size is a 2.15 mm drill?

0.0846 inches, which is 2.15 mm. It is a metric drill.

What can I tap with a 2.15 mm drill?

4 threads: #4-40 at 84.4%, #3-56 at 62.1%, M2.5 x 0.45 at 59.9%, #3-48 at 53.2%.

What drill is next to a 2.15 mm?

Down: 2.1 mm at 0.0827 in. Up: #44 at 0.086 in.