MSC 302-0.3150 Solid Pilot Counterbore: 0.5315" Dia, 0.3346" Pilot, 4 Flutes
Solid Pilot Counterbore: 0.5315" Dia, 0.3346" Pilot, 4 Flutes Socket-Head Cap Screw Compatible, 3/16" Shank Dia, 6-1/2" OAL, High Speed Steel
$59.07