#0-80 UNF tap drill size

3/64 drill — 0.0469 in / 1.19 mm (81% thread)

Major Ø 0.0600 in · 80 threads per inch · fine series. The chart pick targets 75% thread; nearby standard drills:

Drill	Decimal (in)	mm	Thread %
#55	0.0520	1.32	49%
3/64	0.0469	1.19	81%
#56	0.0465	1.18	83%
#57	0.0430	1.09	105%

Cut taps only — roll-form taps need a larger hole. 65–75% suits general work; drop toward 55% in tough material. Verify before you cut.