Alvord Polk 03004 Solid Pilot Counterbore: 0.221" Dia, 0.14" Pilot
Solid Pilot Counterbore: 0.221" Dia, 0.14" Pilot 5-40" Fillister-Head Screw Compatible, 3/16" Shank Dia, 4-1/8" OAL, High Speed Steel
$32.17