Tap Drill Size Chart

13.5 mm Drill Size

metric drill

13.5 mm 0.5315 in 13.50 mm

A 13.5 mm drill measures 0.5315 in. It taps 2 threads in this chart.

What a 13.5 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 13.5 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
5/8-11 79.2% 17/32″ 79.4%
9/16-24 57.3% 33/64″ 86.6%

Drills either side

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13.5 mm drill: common questions

What size is a 13.5 mm drill?
0.5315 inches, which is 13.50 mm. It is a metric drill.
What can I tap with a 13.5 mm drill?
2 threads: 5/8-11 at 79.2%, 9/16-24 at 57.3%.
What drill is next to a 13.5 mm?
Down: 17/32 in at 0.5312 in. Up: 13.6 mm at 0.5354 in.