Tap Drill Size Chart

17.7 mm Drill Size

metric drill

17.7 mm 0.6969 in 17.70 mm

A 17.7 mm drill measures 0.6969 in. It taps 3 threads in this chart.

What a 17.7 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 17.7 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
3/4-20 81.8% 45/64″ 72.2%
M20 x 2.5 70.8% 17.5 mm 77.0%
3/4-16 65.4% 11/16″ 77.0%

Drills either side

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17.7 mm drill: common questions

What size is a 17.7 mm drill?
0.6969 inches, which is 17.70 mm. It is a metric drill.
What can I tap with a 17.7 mm drill?
3 threads: 3/4-20 at 81.8%, M20 x 2.5 at 70.8%, 3/4-16 at 65.4%.
What drill is next to a 17.7 mm?
Down: 17.6 mm at 0.6929 in. Up: 17.8 mm at 0.7008 in.