#3-48 UNC tap drill size

#47 drill — 0.0785 in / 1.99 mm (76% thread)

Major Ø 0.0990 in · 48 threads per inch · coarse series. The chart pick targets 75% thread; nearby standard drills:

Drill	Decimal (in)	mm	Thread %
#46	0.0810	2.06	67%
#47	0.0785	1.99	76%
5/64	0.0781	1.98	77%
#48	0.0760	1.93	85%

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.

Same size, fine series: #3-56 UNF