Value Collection SC10100024 Countersink 100 Deg 3/8 in Hss

Product Description

The VALUE COLLECTION SC10100024 is a single-flute countersink designed for creating clean, accurately angled recesses in metallic and non-metallic workpieces. Built from high-speed steel (HSS) with a bright, uncoated finish, this tool delivers reliable cutting performance for general countersinking operations. It features a 100-degree included angle and a 3/8-inch head diameter, making it suitable for standard countersunk fastener applications. The straight cylindrical shank measures 1/4 inch in diameter for compatibility with common drill chucks and quick-change holders. At 0.04 pounds, this is a compact, lightweight tool suited to bench work and portable drilling setups.

This countersink is intended for countersinking operations in shop, field, and light manufacturing environments. The single-flute design reduces chatter and produces a smooth finish on the conical recess, which is important when seating flat-head fasteners flush or below the workpiece surface. It is a hand-tool or machine-spindle application suited to machinists, fabricators, maintenance mechanics, and skilled tradespeople working with drill presses, CNC machines, or handheld drills.

Key Features

• 100-degree included angle (50-degree centerline angle) for standard countersunk fastener seating
• Single-flute geometry reduces chatter and improves surface finish in the recess
• 3/8-inch head diameter for typical flat-head screw countersinking work
• 1/4-inch straight cylindrical shank fits standard drill chucks and quick-change systems
• High-speed steel construction provides durability across a range of workpiece materials
• Bright, uncoated finish — suitable for general-purpose use without specialized coating requirements

Compatibility

Designed as a general-purpose countersink for use with standard 1/4-inch straight-shank drill chucks, quick-change holders, and drill press spindles accepting straight cylindrical shanks.

Installation Notes

A licensed machinist or skilled tradesperson should secure the workpiece firmly before operating this tool to prevent walking or chatter. Ensure the drill press or handheld drill is powered off and the bit is fully seated and tightened in the chuck before beginning. Use cutting fluid or light oil when countersinking harder metals to extend tool life and maintain finish quality. Do not exceed the recommended RPM for high-speed steel tooling on the material being cut.