15/16 in Drill Size

fractional drill

15/16″ 0.9375 in 23.81 mm

A 15/16 in drill measures 0.9375 in. It taps 2 threads in this chart.

What a 15/16 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 15/16 in drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
M27 x 3	81.8%	24 mm	77.0%
1-12	57.7%	59/64″	72.1%

Other jobs for a 15/16 in

Hard-material tap drill: The size to use in stainless or tool steel for 1-12, where it leaves a shallower thread than the standard drill and cuts tapping torque.
Form-tap hole: The published roll-tap hole for 1-8. A form tap displaces metal instead of cutting it, so it needs this larger hole.
Clearance hole: The through hole a bolt passes in, not a tapped hole: normal fit for 7/8-9, normal fit for 7/8-14, normal fit for 7/8-20. See the clearance hole chart.

Drills either side

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15/16 in drill: common questions

What size is a 15/16 in drill?

0.9375 inches, which is 23.81 mm. It is a fractional drill.

What can I tap with a 15/16 in drill?

2 threads: M27 x 3 at 81.8%, 1-12 at 57.7%.

Is a 15/16 in drill used for clearance holes?

Yes: normal fit for 7/8-9, normal fit for 7/8-14, normal fit for 7/8-20. A clearance hole is not tapped; the bolt passes through it.

What drill is next to a 15/16 in?

Down: 29/32 in at 0.9062 in. Up: 24 mm at 0.9449 in.