Tap Drill Size Chart

6.9 mm Drill Size

metric drill

6.9 mm 0.2717 in 6.90 mm

A 6.9 mm drill measures 0.2717 in. It taps 4 threads in this chart.

What a 6.9 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 6.9 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
M8 x 1 84.7% 7 mm 77.0%
5/16-24 75.4% I 74.8%
M8 x 1.25 67.7% 6.8 mm 73.9%
5/16-18 56.5% F 76.9%

Drills either side

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

6.9 mm drill: common questions

What size is a 6.9 mm drill?
0.2717 inches, which is 6.90 mm. It is a metric drill.
What can I tap with a 6.9 mm drill?
4 threads: M8 x 1 at 84.7%, 5/16-24 at 75.4%, M8 x 1.25 at 67.7%, 5/16-18 at 56.5%.
What drill is next to a 6.9 mm?
Down: 6.8 mm at 0.2677 in. Up: I at 0.272 in.