N drill bit size

N drill = .3020 in = 7.67 mm. Closest metric drill: 7.7 mm.

Nearby drill sizes

Drill	Type	Inch	mm	Difference
9/32	fraction	.2813 in	7.144	-20.7 thou
L	letter	.2900 in	7.366	-12.0 thou
M	letter	.2950 in	7.493	-7.0 thou
19/64	fraction	.2969 in	7.541	-5.1 thou
N	letter	.3020 in	7.671	0.0 thou
5/16	fraction	.3125 in	7.938	10.5 thou
O	letter	.3160 in	8.026	14.0 thou
P	letter	.3230 in	8.204	21.0 thou
21/64	fraction	.3281 in	8.334	26.1 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.