24.5 mm Drill Size

metric drill

24.5 mm 0.9646 in 24.50 mm

A 24.5 mm drill measures 0.9646 in. It taps 2 threads in this chart.

What a 24.5 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 24.5 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
M27 x 3	64.2%	24 mm	77.0%
1-20	54.5%	61/64″	72.2%

Other jobs for a 24.5 mm

Hard-material tap drill: The size to use in stainless or tool steel for M27 x 3, where it leaves a shallower thread than the standard drill and cuts tapping torque.

Drills either side

61/64″ 0.9531 in · 24.21 mm Next size down
31/32″ 0.9688 in · 24.61 mm Next size up

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

24.5 mm drill: common questions

What size is a 24.5 mm drill?

0.9646 inches, which is 24.50 mm. It is a metric drill.

What can I tap with a 24.5 mm drill?

2 threads: M27 x 3 at 64.2%, 1-20 at 54.5%.

What drill is next to a 24.5 mm?

Down: 61/64 in at 0.9531 in. Up: 31/32 in at 0.9688 in.