#75 drill bit size

#75 drill = .0210 in = 0.53 mm. Closest metric drill: 1 mm.

Nearby drill sizes

Drill	Type	Inch	mm	Difference
1/64	fraction	.0156 in	0.397	-5.4 thou
#78	number	.0160 in	0.406	-5.0 thou
#77	number	.0180 in	0.457	-3.0 thou
#76	number	.0200 in	0.508	-1.0 thou
#75	number	.0210 in	0.533	0.0 thou
#74	number	.0225 in	0.571	1.5 thou
#73	number	.0240 in	0.610	3.0 thou
#72	number	.0250 in	0.635	4.0 thou
#71	number	.0260 in	0.660	5.0 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.