16 mm Drill Size

metric drill

16 mm 0.6299 in 16.00 mm

A 16 mm drill is the standard tap drill for M18 x 2.

What a 16 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 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 chart drill	77.0%	16 mm	77.0%
M18 x 2.5	61.6%	15.5 mm	77.0%

Drills either side

15.9 mm 0.626 in · 15.9 mm Next size down
16.1 mm 0.6339 in · 16.1 mm Next size up

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

16 mm drill: common questions

What size is a 16 mm drill?

0.6299 inches, which is 16.00 mm. It is a metric drill.

What can I tap with a 16 mm drill?

2 threads: M18 x 2 at 77.0%, M18 x 2.5 at 61.6%.

Is a 16 mm drill the standard tap drill for anything?

Yes, for M18 x 2 (77.0% thread). That is the size published tap and drill charts give.

What drill is next to a 16 mm?

Down: 15.9 mm at 0.626 in. Up: 16.1 mm at 0.6339 in.