6.7 mm Drill Size

metric drill

6.7 mm 0.2638 in 6.70 mm

A 6.7 mm drill measures 0.2638 in. It taps 2 threads in this chart.

What a 6.7 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 6.7 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
M8 x 1.25	80.1%	6.8 mm	73.9%
5/16-18	67.5%	F	76.9%

Drills either side

G 0.261 in · 6.63 mm Next size down
17/64″ 0.2656 in · 6.75 mm Next size up

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

6.7 mm drill: common questions

What size is a 6.7 mm drill?

0.2638 inches, which is 6.70 mm. It is a metric drill.

What can I tap with a 6.7 mm drill?

2 threads: M8 x 1.25 at 80.1%, 5/16-18 at 67.5%.

What drill is next to a 6.7 mm?

Down: G at 0.261 in. Up: 17/64 in at 0.2656 in.