49/64 inch in mm and decimal

49/64 in = 0.765625 in = 19.447 mm. Closest metric drill: 19.5 mm.

Taps that use a 49/64 drill

Drill	Type	Inch	mm	Difference
45/64	fraction	.7031 in	17.859	-62.5 thou
23/32	fraction	.7188 in	18.256	-46.9 thou
47/64	fraction	.7344 in	18.653	-31.3 thou
3/4	fraction	.7500 in	19.050	-15.6 thou
49/64	fraction	.7656 in	19.447	0.0 thou
25/32	fraction	.7813 in	19.844	15.6 thou
51/64	fraction	.7969 in	20.241	31.3 thou
13/16	fraction	.8125 in	20.637	46.9 thou
53/64	fraction	.8281 in	21.034	62.5 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.