26.5 mm Drill Size

metric drill

26.5 mm 1.0433 in 26.50 mm

A 26.5 mm drill is the standard tap drill for M30 x 3.5.

What a 26.5 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 26.5 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
M30 x 3.5 chart drill	77.0%	26.5 mm	77.0%
1-1/8-12	75.5%	1-3/64″	72.1%

Other jobs for a 26.5 mm

Form-tap hole: The published roll-tap hole for M27 x 1.5. A form tap displaces metal instead of cutting it, so it needs this larger hole.

Drills either side

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

26.5 mm drill: common questions

What size is a 26.5 mm drill?

1.0433 inches, which is 26.50 mm. It is a metric drill.

What can I tap with a 26.5 mm drill?

2 threads: M30 x 3.5 at 77.0%, 1-1/8-12 at 75.5%.

Is a 26.5 mm drill the standard tap drill for anything?

Yes, for M30 x 3.5 (77.0% thread). That is the size published tap and drill charts give.

What drill is next to a 26.5 mm?

Down: 1-1/32 in at 1.0312 in. Up: 1-3/64 in at 1.0469 in.