Value Collection 28626 Countersink 5/16 in 82 Deg 6 Flute Hss

Product Description

The VALUE COLLECTION 28626 is a single-flute countersink designed for creating conical seat holes in metal, wood, and composite materials prior to fastener installation. Built from high speed steel (HSS), this tool delivers the hardness and wear resistance required for repetitive countersinking in production and maintenance environments. The 82-degree included angle matches the standard seating angle for flat-head machine screws and bolts used throughout general machining, fabrication, and assembly work. The 5/16-inch head diameter and 1/4-inch shank diameter make it compatible with standard drill chucks and quick-change holders found on benchtop drill presses and handheld drills.

This countersink is suited for light-duty to general-purpose applications in machine shops, fabrication facilities, and maintenance operations. The 6-flute configuration provides a smoother cut finish compared to single or three-flute designs, reducing chatter on ferrous and non-ferrous metals. Typical use cases include deburring pre-drilled holes and preparing seats for flat-head fasteners in panel work, structural framing components, and enclosure fabrication.

Key Features

• High speed steel construction for hardness and wear resistance across ferrous and non-ferrous materials
• 82-degree included angle matches standard flat-head fastener seating geometry
• 6-flute design reduces chatter and produces a cleaner, smoother countersink finish
• 5/16-inch head diameter for light-duty to general-purpose countersinking tasks
• 1/4-inch shank diameter fits standard drill chucks and quick-change collet holders

Compatibility

Designed as an OEM-style replacement or standard tooling option for use with drill presses, handheld drills, and milling machines accepting a 1/4-inch shank countersink tool.

Installation Notes

Install the 28626 into a properly tightened drill chuck or collet holder before powering the machine. Set spindle speed appropriate to the workpiece material — harder materials require lower RPMs to preserve cutting edge life. Secure the workpiece firmly before operation to prevent movement during the countersinking pass. Inspect the cutting edges for wear regularly and replace the tool when chatter or rough finish quality increases.