W Drill Size

A W letter drill is 0.3860" (9.804 mm).

Closest fraction: 25/64 (0.3906", over by 0.0046").

Next size down / up

Drill	Inch	mm
V	0.3770	9.576
25/64	0.3906	9.922

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