Value Collection 08908683 Counterbore Pilot Carbon Steel

Product Description

The VALUE COLLECTION 08908683 is a counterbore pilot used to guide counterboring operations and maintain concentricity between a drilled hole and a counterbored seat. The pilot fits into the existing drilled hole while the counterbore cuts a flat-bottomed recess for fastener heads, inserts, or bushings. Machined from carbon steel with a bright uncoated finish, this pilot features a 1-1/16 inch head diameter and a 7/16 inch shank diameter. It is a standard tooling accessory used by machinists and maintenance technicians working with counterboring setups on mills, drill presses, and manual boring fixtures.

This counterbore pilot is suited for shop and industrial maintenance applications where a 7/16 inch pilot diameter is required to match a pre-drilled hole. It supports accurate counterboring to produce clean, flat-bottomed recesses for socket head cap screws, flat head fasteners, or similar hardware. The carbon steel construction makes it appropriate for use on mild steel, aluminum, and other common workpiece materials encountered in general machining and repair work.

Key Features

• 1-1/16 inch head diameter for counterbore sizing
• 7/16 inch shank diameter to match pre-drilled pilot holes
• Carbon steel construction for general-purpose machining applications
• Bright uncoated finish for standard shop use
• Sold individually as a single-piece unit

Compatibility

Designed as a replacement or supplemental pilot for standard counterboring tool sets requiring a 7/16 inch shank diameter and 1-1/16 inch head diameter.

Installation Notes

Installation is performed by machinists or maintenance technicians as part of a counterboring setup. Ensure the machine spindle is fully powered down and secured before inserting or removing the pilot from the counterbore body. Verify that the pilot shank diameter matches the guide hole diameter in the workpiece before beginning the counterboring operation to prevent tool wander or surface damage.