47/64 in Drill Size

fractional drill

47/64″ 0.7344 in 18.65 mm

A 47/64 in drill measures 0.7344 in. It taps 2 threads in this chart.

What a 47/64 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 47/64 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 1.5	69.1%	18.5 mm	77.0%
M20 x 2	51.8%	18 mm	77.0%

Other jobs for a 47/64 in

Form-tap hole: The published roll-tap hole for 3/4-20. 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: loose fit for 5/8-11, loose fit for 5/8-18, loose fit for 5/8-24. See the clearance hole chart.

Drills either side

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

47/64 in drill: common questions

What size is a 47/64 in drill?

0.7344 inches, which is 18.65 mm. It is a fractional drill.

What can I tap with a 47/64 in drill?

2 threads: M20 x 1.5 at 69.1%, M20 x 2 at 51.8%.

Is a 47/64 in drill used for clearance holes?

Yes: loose fit for 5/8-11, loose fit for 5/8-18, loose fit for 5/8-24. A clearance hole is not tapped; the bolt passes through it.

What drill is next to a 47/64 in?

Down: 18.6 mm at 0.7323 in. Up: 18.7 mm at 0.7362 in.