9/32 in Drill Size

fractional drill

9/32″ 0.2812 in 7.14 mm

A 9/32 in drill is the standard tap drill for 5/16-32.

What a 9/32 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 9/32 in drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
5/16-32 chart drill	77.1%	9/32″	77.1%
M8 x 1	65.9%	7 mm	77.0%
5/16-24	57.8%	I	74.8%
M8 x 1.25	52.7%	6.8 mm	73.9%

Other jobs for a 9/32 in

Clearance hole: The through hole a bolt passes in, not a tapped hole: normal fit for 1/4-20, normal fit for 1/4-28, normal fit for 1/4-32. See the clearance hole chart.

Drills either side

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9/32 in drill: common questions

What size is a 9/32 in drill?

0.2812 inches, which is 7.14 mm. It is a fractional drill.

What can I tap with a 9/32 in drill?

4 threads: 5/16-32 at 77.1%, M8 x 1 at 65.9%, 5/16-24 at 57.8%, M8 x 1.25 at 52.7%.

Is a 9/32 in drill the standard tap drill for anything?

Yes, for 5/16-32 (77.1% thread). That is the size published tap and drill charts give.

Is a 9/32 in drill used for clearance holes?

Yes: normal fit for 1/4-20, normal fit for 1/4-28, normal fit for 1/4-32. A clearance hole is not tapped; the bolt passes through it.

What drill is next to a 9/32 in?

Down: K at 0.281 in. Up: 7.2 mm at 0.2835 in.