#26 Drill Size

number drill

#26 0.147 in 3.73 mm

A #26 drill measures 0.147 in. It taps 1 thread in this chart.

What a #26 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 #26 drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
#10-24	79.4%	#25	74.8%

Drills either side

3.7 mm 0.1457 in · 3.7 mm Next size down
#25 0.1495 in · 3.8 mm Next size up

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

#26 drill: common questions

What size is a #26 drill?

0.147 inches, which is 3.73 mm. It is a number drill.

What can I tap with a #26 drill?

1 thread: #10-24 at 79.4%.

What drill is next to a #26?

Down: 3.7 mm at 0.1457 in. Up: #25 at 0.1495 in.