Harvey Tool 23420-C6 | 5/16" Diameter x 5/16" Shank x 2-1/2" OAL 4 Flute AlTiN Nano Coated Carbide Flat Bottom Counterbore

The flat bottom design featured in this Harvey Tool product offering of Counterbores - Flat Bottom allows for spot facing or counterboring on irregular surfaces.

• For spot facing or counterboring on irregular surfaces
• Flat bottom (no dish) design allows spot facing or counterboring on irregular surfaces
• Ideal for castings, rounded parts, concaved, or drafted surfaces
• Can be used for flat bottom reaming or straightening misaligned holes
• Center cutting
• Ground with full cylindrical margin (not side cutting)
• 15 Degree helix
• 4 flutes
• Solid carbide
• AlTiN coating for increased performance in ferrous materials
• AlTiN Nano coating for superior performance in ferrous and difficult to machine materials
• CNC ground in the USA