#53 Drill Size

number drill

#53 0.0595 in 1.51 mm

A #53 drill is the standard tap drill for #1-64 and #1-72.

What a #53 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 #53 drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
#1-72 chart drill	74.8%	#53	74.8%
#1-64 chart drill	66.5%	#53	66.5%

Drills either side

1.5 mm 0.0591 in · 1.5 mm Next size down
1.55 mm 0.061 in · 1.55 mm Next size up

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

#53 drill: common questions

What size is a #53 drill?

0.0595 inches, which is 1.51 mm. It is a number drill.

What can I tap with a #53 drill?

2 threads: #1-72 at 74.8%, #1-64 at 66.5%.

Is a #53 drill the standard tap drill for anything?

Yes, for #1-64 (66.5% thread) and #1-72 (74.8% thread). That is the size published tap and drill charts give.

What drill is next to a #53?

Down: 1.5 mm at 0.0591 in. Up: 1.55 mm at 0.061 in.