2.3 mm Drill Size

metric drill

2.3 mm 0.0906 in 2.30 mm

A 2.3 mm drill measures 0.0906 in. It taps 2 threads in this chart.

What a 2.3 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 2.3 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
#4-48	79.1%	#42	68.4%
#4-40	65.9%	#43	70.8%

Other jobs for a 2.3 mm

Form-tap hole: The published roll-tap hole for M2.5 x 0.45. A form tap displaces metal instead of cutting it, so it needs this larger hole.

Drills either side

#43 0.089 in · 2.26 mm Next size down
2.35 mm 0.0925 in · 2.35 mm Next size up

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

2.3 mm drill: common questions

What size is a 2.3 mm drill?

0.0906 inches, which is 2.30 mm. It is a metric drill.

What can I tap with a 2.3 mm drill?

2 threads: #4-48 at 79.1%, #4-40 at 65.9%.

What drill is next to a 2.3 mm?

Down: #43 at 0.089 in. Up: 2.35 mm at 0.0925 in.