#78 Drill Size

A #78 number drill is 0.0160" (0.406 mm).

Closest fraction: 1/64 (0.0156", under by 0.0004").

Next size down / up

Drill	Inch	mm
1/64	0.0156	0.397
#77	0.0180	0.457

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