Tap Drill Size Chart

18.2 mm Drill Size

metric drill

18.2 mm 0.7165 in 18.20 mm

A 18.2 mm drill measures 0.7165 in. It taps 3 threads in this chart.

What a 18.2 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 18.2 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
M20 x 2 69.3% 18 mm 77.0%
M20 x 2.5 55.4% 17.5 mm 77.0%
3/4-20 51.6% 45/64″ 72.2%

Drills either side

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18.2 mm drill: common questions

What size is a 18.2 mm drill?
0.7165 inches, which is 18.20 mm. It is a metric drill.
What can I tap with a 18.2 mm drill?
3 threads: M20 x 2 at 69.3%, M20 x 2.5 at 55.4%, 3/4-20 at 51.6%.
What drill is next to a 18.2 mm?
Down: 18.1 mm at 0.7126 in. Up: 23/32 in at 0.7188 in.