Value Collection 381-9061 Counterbore Set 3mm-10mm Hss 6pc

Product Description

The VALUE COLLECTION 381-9061 is a 6-piece solid pilot counterbore set designed for use with socket-head cap screws ranging from 3mm to 10mm. Made from high-speed steel (HSS), the set delivers the hardness and wear resistance required for repetitive counterboring in metalworking and fabrication environments. Each tool features a straight cylindrical shank, a standard pilot, and a 3-flute cutting geometry for clean, accurate seat formation. The bright finish reduces friction during cutting. Stored in a metal case, this set is suited for machinists, maintenance technicians, and tool-and-die professionals who need a ready-to-use counterbore solution across common metric fastener sizes.

This counterbore set covers metric socket-head cap screw sizes from 3mm through 10mm, making it applicable in general machining, fixture building, equipment maintenance, and assembly operations where recessed fastener heads are required. The 6-piece configuration provides coverage for the most common metric sizes encountered in industrial and mechanical service work. The metal storage case keeps tools organized and protected between uses, making it practical for both shop and field maintenance settings.

Key Features

• High-speed steel construction for hardness and extended tool life in metal cutting applications
• Covers 3mm, 4mm, 5mm, 6mm, 8mm, and 10mm socket-head cap screw compatibility
• 3-flute cutting geometry produces clean counterbore seats with reduced chatter
• Standard pilot ensures accurate alignment to existing through-holes
• Straight cylindrical shank is compatible with standard drill press and milling machine chucks
• Bright finish reduces friction and aids chip evacuation during forward cutting
• Metal storage case included for organized tool storage and transport

Compatibility

Designed for use with metric socket-head cap screws from 3mm to 10mm. Intended for use in drill presses, milling machines, or similar equipment with standard chuck systems accepting straight cylindrical shanks.

Installation Notes

Counterbore tools should be installed by qualified machinists or maintenance professionals familiar with rotating cutting tool safety. Secure the shank firmly in the chuck and verify the pilot fits the existing pilot hole before beginning the cut. Always set spindle speed appropriate to the workpiece material and tool diameter before engaging the cut. Wear appropriate eye protection and ensure the workpiece is securely clamped before operation.