13/32" (.4062") 4 Flute HSS Aircraft Counterbore Radius .030" ST3001612

13/32" (.4062") 4 Flute HSS Aircraft Counterbore Radius .030" ST3001612 848-6

Diameter .4062"

Radius .030"

Pilot Hole Diameter 1/8"

Shank Diameter 1/4" +.005" / -.000"