H drill bit size

H drill = .2660 in = 6.76 mm. Closest metric drill: 6.8 mm.

Nearby drill sizes

Drill	Type	Inch	mm	Difference
1/4	fraction	.2500 in	6.350	-16.0 thou
F	letter	.2570 in	6.528	-9.0 thou
G	letter	.2610 in	6.629	-5.0 thou
17/64	fraction	.2656 in	6.747	-0.4 thou
H	letter	.2660 in	6.756	0.0 thou
I	letter	.2720 in	6.909	6.0 thou
J	letter	.2770 in	7.036	11.0 thou
K	letter	.2810 in	7.137	15.0 thou
9/32	fraction	.2813 in	7.144	15.2 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.