Tap Drill Size Chart

2.9 mm Drill Size

metric drill

2.9 mm 0.1142 in 2.90 mm

A 2.9 mm drill is the standard tap drill for M3.5 x 0.6.

What a 2.9 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 2.9 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
M3.5 x 0.6 chart drill 77.0% 2.9 mm 77.0%
#6-40 73.3% #33 77.0%
#6-32 58.6% #36 77.6%

Drills either side

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2.9 mm drill: common questions

What size is a 2.9 mm drill?
0.1142 inches, which is 2.90 mm. It is a metric drill.
What can I tap with a 2.9 mm drill?
3 threads: M3.5 x 0.6 at 77.0%, #6-40 at 73.3%, #6-32 at 58.6%.
Is a 2.9 mm drill the standard tap drill for anything?
Yes, for M3.5 x 0.6 (77.0% thread). That is the size published tap and drill charts give.
What drill is next to a 2.9 mm?
Down: #33 at 0.113 in. Up: #32 at 0.116 in.