KEO Counterbore: For M4 Screw, 8 mm Bore Dia, 3.3 mm Pilot Dia

The KEO Counterbore 902-000-049 is used to create a flat-bottomed recess for M4 screw heads in metal or plastic parts. Its built-in pilot aligns with a pre-drilled hole, ensuring concentric counterboring. This cobalt tool is common in machining, tool-and-die, and general industrial fabrication.

This KEO counterbore has an 8 mm bore diameter and a 3.3 mm pilot diameter, designed for M4 screws. It is a standard built-in-pilot type made from cobalt. The manufacturer part number is 902-000-049. These specs ensure precise counterboring for M4 fasteners in industrial applications.

3G Electric supplies the KEO Counterbore 902-000-049 to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we source genuine KEO cutting tools and support procurement across 14 industrial departments.

Select a KEO counterbore with a bore diameter matching the screw head size (8 mm for M4) and a pilot diameter equal to the screw's body diameter (3.3 mm for M4). Ensure the tool is cobalt for heat resistance. Always verify the pilot fits snugly in the pre-drilled hole to avoid chatter.