Tap Drill Size Chart

19.6 mm Drill Size

metric drill

19.6 mm 0.7717 in 19.60 mm

A 19.6 mm drill measures 0.7717 in. It taps 2 threads in this chart.

What a 19.6 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 19.6 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
M22 x 2.5 73.9% 19.5 mm 77.0%
7/8-9 71.6% 49/64″ 75.8%

Other jobs for a 19.6 mm

Form-tap hole
The published roll-tap hole for M20 x 1. 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 →

19.6 mm drill: common questions

What size is a 19.6 mm drill?
0.7717 inches, which is 19.60 mm. It is a metric drill.
What can I tap with a 19.6 mm drill?
2 threads: M22 x 2.5 at 73.9%, 7/8-9 at 71.6%.
What drill is next to a 19.6 mm?
Down: 19.5 mm at 0.7677 in. Up: 19.7 mm at 0.7756 in.