Pilots For Counterbores

Counterboring Is The Enlargement Of A Portion Of A Hole That Has Previously Been Formed. If The Counterbored Portion Is Shallow (1/8" Or Less), The Operations Is Usually Known As Spot-Facing; For Example, A Flat Seat For A Bolt Head Or Nut. If The Hole...

1-1/8 X 7/16 Counterbore Pilot | 1-1/8"

1-1/8 X 3/8 Counterbore Pilot | 1-1/8"