Tap Drill Size Chart

#56 Drill Size

number drill

#56 0.0465 in 1.18 mm

A #56 drill measures 0.0465 in. It taps 2 threads in this chart.

What a #56 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 #56 drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
#0-80 83.1% 3/64″ 80.7%
M1.4 x 0.3 56.2% 1.1 mm 77.0%

Drills either side

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#56 drill: common questions

What size is a #56 drill?
0.0465 inches, which is 1.18 mm. It is a number drill.
What can I tap with a #56 drill?
2 threads: #0-80 at 83.1%, M1.4 x 0.3 at 56.2%.
What drill is next to a #56?
Down: #57 at 0.043 in. Up: 3/64 in at 0.0469 in.