43/64 in Drill Size

fractional drill

43/64″ 0.6719 in 17.07 mm

A 43/64 in drill measures 0.6719 in. It taps 2 threads in this chart.

What a 43/64 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 43/64 in drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
M18 x 1	71.9%	17 mm	77.0%
3/4-10	60.1%	21/32″	72.2%

Other jobs for a 43/64 in

Hard-material tap drill: The size to use in stainless or tool steel for 3/4-10, where it leaves a shallower thread than the standard drill and cuts tapping torque.

Drills either side

17 mm 0.6693 in · 17 mm Next size down
17.1 mm 0.6732 in · 17.1 mm Next size up

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

43/64 in drill: common questions

What size is a 43/64 in drill?

0.6719 inches, which is 17.07 mm. It is a fractional drill.

What can I tap with a 43/64 in drill?

2 threads: M18 x 1 at 71.9%, 3/4-10 at 60.1%.

What drill is next to a 43/64 in?

Down: 17 mm at 0.6693 in. Up: 17.1 mm at 0.6732 in.