7/16 in Drill Size

fractional drill

7/16″ 0.4375 in 11.11 mm

A 7/16 in drill measures 0.4375 in. It taps 3 threads in this chart.

What a 7/16 in 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 7/16 in drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
M12 x 1	68.4%	11 mm	77.0%
1/2-13	62.5%	27/64″	78.2%
M12 x 1.25	54.7%	10.8 mm	73.9%

Other jobs for a 7/16 in

Hard-material tap drill: The size to use in stainless or tool steel for 1/2-13, where it leaves a shallower thread than the standard drill and cuts tapping torque.

Drills either side

11.1 mm 0.437 in · 11.1 mm Next size down
11.2 mm 0.4409 in · 11.2 mm Next size up

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

7/16 in drill: common questions

What size is a 7/16 in drill?

0.4375 inches, which is 11.11 mm. It is a fractional drill.

What can I tap with a 7/16 in drill?

3 threads: M12 x 1 at 68.4%, 1/2-13 at 62.5%, M12 x 1.25 at 54.7%.

What drill is next to a 7/16 in?

Down: 11.1 mm at 0.437 in. Up: 11.2 mm at 0.4409 in.