Counterbores
Lots of choices with or without interchangeable pilots.
Aircraft - Pilot Type
Used to recess – or spot-face – the head of a fastener or cap-screw. Available with 1/4 or 1/2 shank and interchangeable pilots.
Capscrew
For recessing the head of a cap-screw; pilot is integral to the tool.
Pilots
Used to guide counterbores (spot-facers).
Interchangable - Pilot Type
Used to recess – or spot-face – the head of a fastener or cap-screw. Interchangeable pilot.