T Drill Size

A T letter drill is 0.3580" (9.093 mm).

Closest fraction: 23/64 (0.3594", over by 0.0014").

Next size down / up

Drill	Inch	mm
9 mm	0.3543	9.000
23/64	0.3594	9.128

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