Tap Drill Size Chart

3 mm Drill Size

metric drill

3 mm 0.1181 in 3.00 mm

A 3 mm drill measures 0.1181 in. It taps 2 threads in this chart.

What a 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 3 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
M3.5 x 0.6 64.2% 2.9 mm 77.0%
#6-40 61.3% #33 77.0%

Other jobs for a 3 mm

Hard-material tap drill
The size to use in stainless or tool steel for M3.5 x 0.6, where it leaves a shallower thread than the standard drill and cuts tapping torque.

Drills either side

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

3 mm drill: common questions

What size is a 3 mm drill?
0.1181 inches, which is 3.00 mm. It is a metric drill.
What can I tap with a 3 mm drill?
2 threads: M3.5 x 0.6 at 64.2%, #6-40 at 61.3%.
What drill is next to a 3 mm?
Down: 2.95 mm at 0.1161 in. Up: #31 at 0.120 in.