#37 Drill Size: 0.104 in / 2.64 mm

What a #37 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 #37 drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
#6-32	83.8%	#36	77.6%
#5-44 chart drill	71.1%	#37	71.1%
#5-40	64.7%	#38	72.4%
M3 x 0.5	55.1%	2.5 mm	77.0%

Other jobs for a #37

Form-tap hole: The published roll-tap hole for #4-48. 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 #1-64, loose fit for #1-72. See the clearance hole chart.

Drills either side

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#37 drill: common questions

What size is a #37 drill?

0.104 inches, which is 2.64 mm. It is a number drill.

What can I tap with a #37 drill?

4 threads: #6-32 at 83.8%, #5-44 at 71.1%, #5-40 at 64.7%, M3 x 0.5 at 55.1%.

Is a #37 drill the standard tap drill for anything?

Yes, for #5-44 (71.1% thread). That is the size published tap and drill charts give.

Is a #37 drill used for clearance holes?

Yes: loose fit for #1-64, loose fit for #1-72. A clearance hole is not tapped; the bolt passes through it.

What drill is next to a #37?

Down: 2.6 mm at 0.1024 in. Up: 2.65 mm at 0.1043 in.