3.7 mm Drill Size

metric drill

3.7 mm 0.1457 in 3.70 mm

A 3.7 mm drill measures 0.1457 in. It taps 2 threads in this chart.

What a 3.7 mm 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 3.7 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
#10-24	81.8%	#25	74.8%
#8-36	50.7%	#29	77.6%

Other jobs for a 3.7 mm

Form-tap hole: The published roll-tap hole for M4 x 0.7. A form tap displaces metal instead of cutting it, so it needs this larger hole.

Drills either side

#27 0.144 in · 3.66 mm Next size down
#26 0.147 in · 3.73 mm Next size up

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

3.7 mm drill: common questions

What size is a 3.7 mm drill?

0.1457 inches, which is 3.70 mm. It is a metric drill.

What can I tap with a 3.7 mm drill?

2 threads: #10-24 at 81.8%, #8-36 at 50.7%.

What drill is next to a 3.7 mm?

Down: #27 at 0.144 in. Up: #26 at 0.147 in.