Hertel 331-005080 Countersink 3/8 in 100 Deg 1 Flute

Product Description

The HERTEL 331-005080 is a single-flute countersink designed for precise countersinking operations in metal, wood, and composite materials. Built from alloy steel with a bright, uncoated finish, this tool delivers clean, accurate seat geometry for flathead fastener installations. The 3/8-inch head diameter and 100-degree included angle make it well-suited for standard countersink fastener profiles. The 1/4-inch straight cylindrical shank provides secure chuck engagement across a wide range of drilling equipment. At 0.1 pounds, it is compact and easy to handle during repetitive operations.

This countersink is intended for use in machining, metalworking, fabrication, and general shop environments. It suits applications where a single-flute tool is preferred for smooth cutting action and reduced chatter in softer materials. The right-hand cutting direction is compatible with standard drill press and handheld drill operation. Machinists, tool-and-die technicians, and skilled fabricators are the primary users of this tool.

Key Features

• 3/8-inch head diameter with 100-degree included angle for standard fastener seat profiles
• Single flute design reduces chatter and promotes smooth cutting in softer workpiece materials
• Right-hand cut compatible with standard CW-rotation drill presses and power drills
• 1/4-inch straight cylindrical shank fits common drill chucks without adapters
• Bright, uncoated alloy steel construction for durability in general-purpose countersinking
• No pilot included — suited for use as a standalone countersink without pre-drilled pilot guidance

Compatibility

Designed for general-purpose countersinking applications; compatible with any drill press or power drill accepting a 1/4-inch straight cylindrical shank.

Installation Notes

This tool is installed and operated by machinists and fabricators using standard drill press or handheld drill equipment. Secure the 1/4-inch shank firmly in the chuck before operation and verify rotational direction is set to right-hand before engaging the workpiece. Use appropriate cutting speeds for the workpiece material to avoid overheating the uncoated cutting edge. Always wear appropriate eye protection and secure the workpiece before beginning any countersinking operation.