Tap Drill Size Chart

#61 Drill Size

number drill

#61 0.039 in 0.99 mm

A #61 drill measures 0.039 in. It taps 1 thread in this chart.

What a #61 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 #61 drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
M1.2 x 0.25 64.4% 0.95 mm 77.0%

Drills either side

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#61 drill: common questions

What size is a #61 drill?
0.039 inches, which is 0.99 mm. It is a number drill.
What can I tap with a #61 drill?
1 thread: M1.2 x 0.25 at 64.4%.
What drill is next to a #61?
Down: #62 at 0.038 in. Up: #60 at 0.040 in.