Value Collection 08904187 Counterbore Pilot Carbon Steel

Product Description

The VALUE COLLECTION 08904187 is a counterbore pilot used to guide counterbore cutting tools during precision machining operations. The pilot fits into a pre-drilled hole and aligns the counterbore cutter so the recess seats concentrically with the fastener bore. It features a 9/32-inch head diameter and a 3/16-inch shank diameter. Constructed from carbon steel with a bright, uncoated finish, this pilot delivers adequate hardness and dimensional accuracy for light to medium machining tasks in metal, wood, and composite materials. Machinists and maintenance technicians install this type of tool in drill presses, milling machines, and hand-held power drills.

Counterbore pilots are used wherever a flat-bottomed recess is needed to seat socket-head cap screws, bolts, or other fasteners flush with or below a workpiece surface. This pilot is suited for shop and field applications in manufacturing, mechanical maintenance, HVAC equipment assembly, and general fabrication. The 3/16-inch shank diameter is matched to the corresponding counterbore cutter body that accepts this size pilot.

Key Features

• 9/32-inch head diameter for proper counterbore alignment
• 3/16-inch shank diameter for secure seating in the cutter body
• Carbon steel construction for durability in light to medium machining
• Bright, uncoated finish — no additional coating to affect dimensional tolerance
• Sold individually — quantity of one per package

Compatibility

Designed as a replacement or spare counterbore pilot for cutter bodies accepting a 3/16-inch shank with a 9/32-inch head diameter. Consult the counterbore cutter manufacturer to confirm pilot size compatibility before installation.

Installation Notes

Counterbore pilots are installed by machinists or maintenance technicians. Secure the workpiece firmly before operation and ensure the pilot slides freely into the guide hole before engaging the cutter. Power down and de-energize any equipment being drilled or serviced before starting. Do not force-fit a pilot that does not seat cleanly, as this can cause cutter misalignment and workpiece damage.