19 mm Drill Size

metric drill

19 mm 0.748 in 19.00 mm

A 19 mm drill is the standard tap drill for M20 x 1.

What a 19 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 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
M20 x 1 chart drill	77.0%	19 mm	77.0%
M20 x 1.5	51.3%	18.5 mm	77.0%

Drills either side

18.9 mm 0.7441 in · 18.9 mm Next size down
19.2 mm 0.7559 in · 19.2 mm Next size up

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

19 mm drill: common questions

What size is a 19 mm drill?

0.748 inches, which is 19.00 mm. It is a metric drill.

What can I tap with a 19 mm drill?

2 threads: M20 x 1 at 77.0%, M20 x 1.5 at 51.3%.

Is a 19 mm drill the standard tap drill for anything?

Yes, for M20 x 1 (77.0% thread). That is the size published tap and drill charts give.

What drill is next to a 19 mm?

Down: 18.9 mm at 0.7441 in. Up: 19.2 mm at 0.7559 in.