Cleveland C00971 Countersink Set 5 Pc Hss 82 Degree

Product Description

The CLEVELAND C00971 is a 5-piece countersink set designed for creating angled seat recesses in metal workpieces. Each countersink in the set features a single flute, right-hand cutting direction, and an 82-degree included angle — the standard angle for flat-head fastener seating in carbon steel and cast iron applications. Head diameters range from 1/4 inch to 3/4 inch, allowing the set to cover a practical spread of fastener sizes with one kit. Shanks are straight-profile, ranging from 4.76 mm to 1/2 inch in diameter. Overall lengths run from 1.5 inches to 2.63 inches across the five pieces. All tools carry a bright, uncoated finish and are manufactured from high-speed steel.

This set is suited for machine shops, maintenance facilities, and fabrication operations that regularly countersink flat-head screw holes in carbon steel and cast iron. The five-piece range eliminates the need to source individual countersinks for common fastener sizes. Tools ship in a plastic storage case, keeping the set organized and protecting cutting edges between uses. Typical applications include drill press, mill, or hand-held drill-driver setups where consistent 82-degree seat geometry is required across multiple fastener diameters.

Key Features

• 5-piece set covering head diameters from 1/4 inch to 3/4 inch
• 82-degree included angle for standard flat-head fastener countersinking
• Single-flute design for clean, controlled material removal
• High-speed steel construction for durability in carbon steel and cast iron
• Straight shank compatible with standard drill chucks
• Includes plastic storage case to protect cutting edges

Compatibility

Designed for countersinking operations in carbon steel and cast iron workpieces. Intended for use with standard 82-degree flat-head fasteners across the included head diameter range.

Installation Notes

Countersinks should be installed by a machinist or qualified tradesperson familiar with rotary cutting tools and safe drill press or milling machine operation. Secure the workpiece firmly before operation to prevent movement during cutting. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Inspect cutting edges before each use and do not run damaged or chipped tools.