Value Collection SC2090020 Countersink 90 Degree 6 Flute Hss

Product Description

The VALUE COLLECTION SC2090020 is a 6-flute, 90-degree included angle countersink designed for creating clean, chamfered seat profiles in metal and other materials prior to fastener installation. Machined from high-speed steel (HSS) with a bright, uncoated finish, this tool offers consistent performance across a range of countersinking operations. It features a 5/16-inch head diameter and a 1/4-inch straight-cylindrical shank, making it compatible with standard drill chucks and collet holders. The right-hand cutting direction suits conventional drill press and hand-drill setups. Machinists, toolmakers, and maintenance professionals use this type of tool for deburring holes and preparing flat-head fastener seats.

This countersink is suited for general-purpose countersinking tasks in job shops, manufacturing facilities, and maintenance environments. The 90-degree included angle matches the seating geometry of most standard flat-head machine screws and bolts used in metalworking applications. The 45-degree centerline angle and 6-flute design help reduce chatter and produce a smooth finish on the chamfered seat. It is sold as a single-end tool with no pilot and a straight-cylindrical shank for quick changeover in drill presses, milling machines, or hand drills.

Key Features

• 90-degree included angle matches standard flat-head fastener seat geometry
• 6-flute design reduces chatter and improves surface finish quality
• High-speed steel construction provides durability across ferrous and non-ferrous materials
• 1/4-inch straight-cylindrical shank fits standard drill chucks and collet holders
• Bright, uncoated finish for general-purpose shop use
• Single-end, no-pilot configuration for straightforward countersinking setups

Compatibility

Designed as a general-purpose countersink for use with standard drill presses, milling machines, and hand drills equipped with a chuck or collet that accepts a 1/4-inch straight-cylindrical shank.

Installation Notes

This tool is typically installed and operated by machinists or maintenance technicians following standard shop-safety practices. Secure the workpiece firmly before operation and ensure the shank is fully seated and clamped in the chuck or collet before running the spindle. Use appropriate cutting speeds for the workpiece material to avoid overheating the HSS tool. Always wear eye protection when operating rotary cutting tools.