Tap Drill Size Chart

23/32 in Drill Size

fractional drill

23/32″ 0.7188 in 18.26 mm

A 23/32 in drill measures 0.7188 in. It taps 2 threads in this chart.

What a 23/32 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 23/32 in drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
M20 x 2 67.1% 18 mm 77.0%
M20 x 2.5 53.7% 17.5 mm 77.0%

Other jobs for a 23/32 in

Hard-material tap drill
The size to use in stainless or tool steel for 3/4-20, where it leaves a shallower thread than the standard drill and cuts tapping torque.
Form-tap hole
The published roll-tap hole for 3/4-16. A form tap displaces metal instead of cutting it, so it needs this larger hole.

Drills either side

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23/32 in drill: common questions

What size is a 23/32 in drill?
0.7188 inches, which is 18.26 mm. It is a fractional drill.
What can I tap with a 23/32 in drill?
2 threads: M20 x 2 at 67.1%, M20 x 2.5 at 53.7%.
What drill is next to a 23/32 in?
Down: 18.2 mm at 0.7165 in. Up: 18.3 mm at 0.7205 in.