Value Collection 08903247 Counterbore Pilot Carbon Steel

Product Description

The VALUE COLLECTION 08903247 is a counterbore pilot used to guide counterbore cutters during precision machining and metalworking operations. The pilot features a 3/8 inch head diameter and a 5/32 inch shank diameter, allowing it to seat properly within a counterbore tool body and align the cutter concentrically with an existing hole. Constructed from carbon steel with a bright, uncoated finish, this pilot is suited for general-purpose shop use where a hardened or coated tool is not required. It is a single-piece item and is typically kept on hand as a replacement or spare in machine shops, maintenance shops, and fabrication environments.

Counterbore pilots are used wherever a flat-bottomed recess must be cut concentrically around a pre-drilled hole — common in bolt-clearance counterboring, fastener seating, and fixture work. This pilot is sized for use in tooling setups requiring a 3/8 inch head and a 5/32 inch shank, making it appropriate for light to medium-duty manual and CNC milling applications in both production and maintenance settings.

Key Features

• 3/8 inch head diameter for proper counterbore cutter engagement
• 5/32 inch shank diameter fits corresponding counterbore tool bodies
• Carbon steel construction suitable for general-purpose machining
• Bright, uncoated finish — no added coating to alter dimensional tolerances
• Single-piece quantity, easy to stock as a replacement pilot

Compatibility

Designed as an OEM-style replacement or spare pilot for counterbore tool bodies requiring a 3/8 inch head diameter and 5/32 inch shank diameter configuration.

Installation Notes

Counterbore pilots are installed by machinists and toolmakers into compatible counterbore cutter bodies before use. Ensure the milling machine or drill press is fully powered down and the spindle is secured before changing or inspecting pilots. The pilot should fit snugly without play in the tool body bore to maintain concentricity during cutting. Inspect the pilot for wear or damage before each use, as a worn pilot will compromise hole alignment.