Tap Drill Size Chart

19.7 mm Drill Size

metric drill

19.7 mm 0.7756 in 19.70 mm

A 19.7 mm drill measures 0.7756 in. It taps 2 threads in this chart.

What a 19.7 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 19.7 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 70.8% 19.5 mm 77.0%
7/8-9 68.9% 49/64″ 75.8%

Drills either side

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19.7 mm drill: common questions

What size is a 19.7 mm drill?
0.7756 inches, which is 19.70 mm. It is a metric drill.
What can I tap with a 19.7 mm drill?
2 threads: M22 x 2.5 at 70.8%, 7/8-9 at 68.9%.
What drill is next to a 19.7 mm?
Down: 19.6 mm at 0.7717 in. Up: 19.8 mm at 0.7795 in.