13.8 mm Drill Size

metric drill

13.8 mm 0.5433 in 13.80 mm

A 13.8 mm drill measures 0.5433 in. It taps 2 threads in this chart.

What a 13.8 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 13.8 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
M16 x 2	84.7%	14 mm	77.0%
5/8-11	69.2%	17/32″	79.4%

Drills either side

13.6 mm 0.5354 in · 13.6 mm Next size down
35/64″ 0.5469 in · 13.89 mm Next size up

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

13.8 mm drill: common questions

What size is a 13.8 mm drill?

0.5433 inches, which is 13.80 mm. It is a metric drill.

What can I tap with a 13.8 mm drill?

2 threads: M16 x 2 at 84.7%, 5/8-11 at 69.2%.

What drill is next to a 13.8 mm?

Down: 13.6 mm at 0.5354 in. Up: 35/64 in at 0.5469 in.