19.4 mm Drill Size

metric drill

19.4 mm 0.7638 in 19.40 mm

A 19.4 mm drill measures 0.7638 in. It taps 2 threads in this chart.

What a 19.4 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 19.4 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	80.1%	19.5 mm	77.0%
7/8-9	77.0%	49/64″	75.8%

Drills either side

19.3 mm 0.7598 in · 19.3 mm Next size down
49/64″ 0.7656 in · 19.45 mm Next size up

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

19.4 mm drill: common questions

What size is a 19.4 mm drill?

0.7638 inches, which is 19.40 mm. It is a metric drill.

What can I tap with a 19.4 mm drill?

2 threads: M22 x 2.5 at 80.1%, 7/8-9 at 77.0%.

What drill is next to a 19.4 mm?

Down: 19.3 mm at 0.7598 in. Up: 49/64 in at 0.7656 in.