59/64 inch in mm and decimal

59/64 in = 0.921875 in = 23.416 mm. Closest metric drill: 20 mm.

Taps that use a 59/64 drill

Drill	Type	Inch	mm	Difference
55/64	fraction	.8594 in	21.828	-62.5 thou
7/8	fraction	.8750 in	22.225	-46.9 thou
57/64	fraction	.8906 in	22.622	-31.3 thou
29/32	fraction	.9063 in	23.019	-15.6 thou
59/64	fraction	.9219 in	23.416	0.0 thou
15/16	fraction	.9375 in	23.812	15.6 thou
61/64	fraction	.9531 in	24.209	31.3 thou
31/32	fraction	.9688 in	24.606	46.9 thou
63/64	fraction	.9844 in	25.003	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.