Tap Drill Size Chart

19.5 mm Drill Size

metric drill

19.5 mm 0.7677 in 19.50 mm

A 19.5 mm drill is the standard tap drill for M22 x 2.5.

What a 19.5 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 19.5 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 chart drill 77.0% 19.5 mm 77.0%
7/8-9 74.3% 49/64″ 75.8%

Drills either side

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19.5 mm drill: common questions

What size is a 19.5 mm drill?
0.7677 inches, which is 19.50 mm. It is a metric drill.
What can I tap with a 19.5 mm drill?
2 threads: M22 x 2.5 at 77.0%, 7/8-9 at 74.3%.
Is a 19.5 mm drill the standard tap drill for anything?
Yes, for M22 x 2.5 (77.0% thread). That is the size published tap and drill charts give.
What drill is next to a 19.5 mm?
Down: 49/64 in at 0.7656 in. Up: 19.6 mm at 0.7717 in.