15/32 in Drill Size: 0.4688 in / 11.91 mm

What a 15/32 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 15/32 in drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
M14 x 2	80.6%	12 mm	77.0%
1/2-28 chart drill	67.2%	15/32″	67.2%

Other jobs for a 15/32 in

Hard-material tap drill: The size to use in stainless or tool steel for 1/2-20, where it leaves a shallower thread than the standard drill and cuts tapping torque.
Form-tap hole: The published roll-tap hole for 1/2-13. 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 7/16-14, normal fit for 7/16-20, normal fit for 7/16-28. See the clearance hole chart.

Drills either side

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15/32 in drill: common questions

What size is a 15/32 in drill?

0.4688 inches, which is 11.91 mm. It is a fractional drill.

What can I tap with a 15/32 in drill?

2 threads: M14 x 2 at 80.6%, 1/2-28 at 67.2%.

Is a 15/32 in drill the standard tap drill for anything?

Yes, for 1/2-28 (67.2% thread). That is the size published tap and drill charts give.

Is a 15/32 in drill used for clearance holes?

Yes: normal fit for 7/16-14, normal fit for 7/16-20, normal fit for 7/16-28. A clearance hole is not tapped; the bolt passes through it.

What drill is next to a 15/32 in?

Down: 11.9 mm at 0.4685 in. Up: 12 mm at 0.4724 in.