HSS Counterbore Drill Bit for Flat Bottom Hole Cutting

Create clean, recessed holes for screws and fasteners with this HSS Counterbore Drill Bit. Designed with an integrated pilot, it helps guide the cutter while producing a flat-bottomed recess around an existing or newly drilled hole. It is suitable for machining, woodworking, metalworking, assembly, and workshop repair tasks.

Key Features

• High-speed steel construction supports reliable cutting performance.

• Integrated pilot helps center and guide the counterbore.

• Creates flat-bottom recesses for compatible screw and bolt heads.

• Available in M3, M4, M5, M6, and M8 size options.

• Suitable for counterboring, slotting, milling, and countersunk preparation.

• Helps achieve consistent depth and improved fastener alignment.

• Compatible with suitable milling machines and drill press setups.

Why Choose This Counterbore Cutter
A raised fastener head can interfere with assembly and surface finishing. This Counterbore Milling Cutter creates a recessed seating area so compatible screws and bolts can sit lower or flush with the surrounding surface.

Perfect For

• Metalworking

• Woodworking

• Machine assembly

• Fastener recessing

• Flat-bottom hole cutting

• Milling projects

• Workshop repairs

• DIY fabrication

Product Specs

• Product Type: Pilot counterbore cutter

• Material: High-speed steel

• Size Options: M3–M8

• Cutting Style: Flat-bottom counterbore

• Applications: Counterboring, milling, slotting, and fastener seating

• Tool Compatibility: Suitable drill presses and milling machines

Create Cleaner Fastener Recesses

Improve the finish and alignment of workshop projects with this practical Pilot Counterbore End Mill, designed for controlled cutting and accurate fastener seating.