#70 drill bit size

#70 drill = .0280 in = 0.71 mm. Closest metric drill: 1 mm.

Nearby drill sizes

Drill	Type	Inch	mm	Difference
#74	number	.0225 in	0.571	-5.5 thou
#73	number	.0240 in	0.610	-4.0 thou
#72	number	.0250 in	0.635	-3.0 thou
#71	number	.0260 in	0.660	-2.0 thou
#70	number	.0280 in	0.711	0.0 thou
#69	number	.0292 in	0.742	1.2 thou
#68	number	.0310 in	0.787	3.0 thou
1/32	fraction	.0313 in	0.794	3.2 thou
#67	number	.0320 in	0.813	4.0 thou

1 thou = 0.001 in = 0.0254 mm. Drills a few thou apart are usually interchangeable for clearance holes, but not for tap drills or reamer pilots.