1.7 mm Drill Size

metric drill

1.7 mm 0.0669 in 1.70 mm

A 1.7 mm drill measures 0.0669 in. It taps 2 threads in this chart.

What a 1.7 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 1.7 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread	% thread	Chart drill	Chart %
#2-56	82.3%	#50	69.0%
M2 x 0.4	57.7%	1.6 mm	77.0%

Other jobs for a 1.7 mm

Hard-material tap drill: The size to use in stainless or tool steel for M2 x 0.4, where it leaves a shallower thread than the standard drill and cuts tapping torque.

Drills either side

#52 0.0635 in · 1.61 mm Next size down
#51 0.067 in · 1.7 mm Next size up

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

1.7 mm drill: common questions

What size is a 1.7 mm drill?

0.0669 inches, which is 1.70 mm. It is a metric drill.

What can I tap with a 1.7 mm drill?

2 threads: #2-56 at 82.3%, M2 x 0.4 at 57.7%.

What drill is next to a 1.7 mm?

Down: #52 at 0.0635 in. Up: #51 at 0.067 in.