Cleveland C46204 Countersink 3/8 in 60 Degree 4 Flute Hss

Product Description

The CLEVELAND C46204 is a 4-flute high speed steel countersink designed for creating clean, chamfered seat profiles in metal workpieces. With a 3/8 inch head diameter and a 60-degree included angle, it produces precise conical recesses sized for flat-head fasteners and deburring applications. The straight cylindrical 1/4 inch shank fits standard drill chucks and quick-change collets. An oxide finish provides basic corrosion resistance and helps with chip evacuation. Right-hand cutting geometry makes it compatible with conventional drill press and hand-drill setups. Machinists, tool and die workers, and maintenance technicians are the primary users of this tool.

This countersink is suited for production and maintenance work in shops handling alloy tool steel and cast iron stock. It is a single-end tool with no pilot, making it adaptable for use with a drill press, milling machine, or hand drill. Typical applications include preparing holes for flat-head cap screws, deburring drilled holes, and chamfering hole entries before tapping. The 60-degree included angle is common in metric and general-purpose fastener seating work.

Key Features

• 3/8 inch head diameter with 60-degree included angle for flat-head fastener seating
• 4-flute geometry for smooth cutting action and reduced chatter
• High speed steel construction for durability in tool steel and cast iron
• Oxide finish for basic corrosion resistance and chip flow
• 1/4 inch straight cylindrical shank fits standard chucks and collets
• Right-hand cut, single-end design with no pilot for flexible positioning

Compatibility

Rated for use in alloy tool steel and cast iron. Compatible with drill presses, milling machines, and hand drills accepting a 1/4 inch straight shank. No pilot included; suitable for use over pre-drilled or punched holes.

Installation Notes

Secure the 1/4 inch shank firmly in the chuck or collet before use and verify the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or lubricant when working in tool steel or cast iron to extend tool life and improve finish quality. Inspect the cutting edges before each use and replace the tool if chipping or wear is observed. Follow applicable shop safety standards for rotating cutting tools, including eye protection and secure guarding.