#77 Drill Size

A #77 number drill is 0.0180" (0.457 mm).

Closest fraction: 1/64 (0.0156", under by 0.0024").

Next size down / up

Drill	Inch	mm
#78	0.0160	0.406
0.5 mm	0.0197	0.500

Printable PDF version - Drill Size Chart
Clean letter-size sheet for the toolbox or shop wall. Instant download, $3.49.