Tap Drill Size Chart

8.6 mm Drill Size

metric drill

8.6 mm 0.3386 in 8.60 mm

A 8.6 mm drill measures 0.3386 in. It taps 2 threads in this chart.

What a 8.6 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 8.6 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
M10 x 1.5 71.9% 8.5 mm 77.0%
3/8-24 67.2% Q 79.4%

Drills either side

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

8.6 mm drill: common questions

What size is a 8.6 mm drill?
0.3386 inches, which is 8.60 mm. It is a metric drill.
What can I tap with a 8.6 mm drill?
2 threads: M10 x 1.5 at 71.9%, 3/8-24 at 67.2%.
What drill is next to a 8.6 mm?
Down: 8.5 mm at 0.3346 in. Up: R at 0.339 in.