Value Collection GH8840241 Pilot Counterbore 3/8 in 4 Flute Hss

Product Description

The VALUE COLLECTION GH8840241 is an interchangeable pilot counterbore designed for precision countersinking and seat preparation in metalworking and aircraft-style applications. Built from high-speed steel with a bright, polished finish, this tool accepts a 3/32 inch pilot shank and mounts on a 1/4 inch straight shank for compatibility with standard drill press and milling setups. Four right-hand cutting flutes deliver smooth, efficient material removal with minimal chatter. The overall length of 2.375 inches keeps the tool compact enough for close-quarter work while maintaining rigidity. Machinists and maintenance technicians working on structural assemblies and precision fabrication will find this counterbore suited for consistent, repeatable results.

This counterbore is intended for aircraft-style counterboring operations on metal workpieces where an interchangeable pilot design is required. The 3/8 inch cutting diameter and straight shank configuration make it a practical choice for drill press, milling machine, or hand-held power tool use in shops performing fabrication, repair, or assembly work on ferrous and non-ferrous metals. It is sold individually and is appropriate for both production environments and single-job service calls.

Key Features

• 3/8 inch counterbore diameter for standard fastener seat preparation
• High-speed steel construction for durability across ferrous and non-ferrous metals
• Interchangeable pilot accepts 3/32 inch pilot shank for versatile setups
• Four right-hand cutting flutes for smooth, efficient material removal
• 1/4 inch straight shank fits standard drill chucks and collets
• Bright, polished finish with no coating — ready to use out of the package

Compatibility

Designed as an OEM-style interchangeable pilot counterbore for use with standard 1/4 inch straight-shank toolholders on drill presses and milling machines performing aircraft-style counterboring operations.

Installation Notes

Installation is performed by machinists or maintenance technicians using standard drill press, milling machine, or hand-held power tool equipment. Secure the 1/4 inch straight shank firmly in a properly sized chuck or collet before operation and verify the pilot is fully seated before engaging the workpiece. Always power down and lock out the machine before changing pilots or adjusting the tool. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain surface finish quality.