7.3 mm Drill Size

metric drill

7.3 mm 0.2874 in 7.30 mm

A 7.3 mm drill is the standard tap drill for M8 x 0.75.

What a 7.3 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 7.3 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 0.75 chart drill	71.9%	7.3 mm	71.9%
5/16-32	61.8%	9/32″	77.1%
M8 x 1	53.9%	7 mm	77.0%

Drills either side

7.2 mm 0.2835 in · 7.2 mm Next size down
L 0.290 in · 7.37 mm Next size up

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

7.3 mm drill: common questions

What size is a 7.3 mm drill?

0.2874 inches, which is 7.30 mm. It is a metric drill.

What can I tap with a 7.3 mm drill?

3 threads: M8 x 0.75 at 71.9%, 5/16-32 at 61.8%, M8 x 1 at 53.9%.

Is a 7.3 mm drill the standard tap drill for anything?

Yes, for M8 x 0.75 (71.9% thread). That is the size published tap and drill charts give.

What drill is next to a 7.3 mm?

Down: 7.2 mm at 0.2835 in. Up: L at 0.290 in.