16.1 mm Drill Size

metric drill

16.1 mm 0.6339 in 16.10 mm

A 16.1 mm drill measures 0.6339 in. It taps 2 threads in this chart.

What a 16.1 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 16.1 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
M18 x 2	73.1%	16 mm	77.0%
M18 x 2.5	58.5%	15.5 mm	77.0%

Other jobs for a 16.1 mm

Hard-material tap drill: The size to use in stainless or tool steel for M18 x 2.5, where it leaves a shallower thread than the standard drill and cuts tapping torque.

Drills either side

16 mm 0.6299 in · 16 mm Next size down
16.2 mm 0.6378 in · 16.2 mm Next size up

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

16.1 mm drill: common questions

What size is a 16.1 mm drill?

0.6339 inches, which is 16.10 mm. It is a metric drill.

What can I tap with a 16.1 mm drill?

2 threads: M18 x 2 at 73.1%, M18 x 2.5 at 58.5%.

What drill is next to a 16.1 mm?

Down: 16 mm at 0.6299 in. Up: 16.2 mm at 0.6378 in.