Tap Drill Size Chart

4.6 mm Drill Size

metric drill

4.6 mm 0.1811 in 4.60 mm

A 4.6 mm drill measures 0.1811 in. It taps 2 threads in this chart.

What a 4.6 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 4.6 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
#12-28 75.2% #14 73.3%
#12-24 64.5% #16 72.1%

Other jobs for a 4.6 mm

Form-tap hole
The published roll-tap hole for M5 x 0.8. A form tap displaces metal instead of cutting it, so it needs this larger hole.

Drills either side

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

4.6 mm drill: common questions

What size is a 4.6 mm drill?
0.1811 inches, which is 4.60 mm. It is a metric drill.
What can I tap with a 4.6 mm drill?
2 threads: #12-28 at 75.2%, #12-24 at 64.5%.
What drill is next to a 4.6 mm?
Down: #15 at 0.180 in. Up: #14 at 0.182 in.