4.1 mm Drill Size

metric drill

4.1 mm 0.1614 in 4.10 mm

A 4.1 mm drill measures 0.1614 in. It taps 2 threads in this chart.

What a 4.1 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 4.1 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
#10-32	70.5%	#21	76.4%
#10-24	52.8%	#25	74.8%

Drills either side

#20 0.161 in · 4.09 mm Next size down
4.2 mm 0.1654 in · 4.2 mm Next size up

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

4.1 mm drill: common questions

What size is a 4.1 mm drill?

0.1614 inches, which is 4.10 mm. It is a metric drill.

What can I tap with a 4.1 mm drill?

2 threads: #10-32 at 70.5%, #10-24 at 52.8%.

What drill is next to a 4.1 mm?

Down: #20 at 0.161 in. Up: 4.2 mm at 0.1654 in.