Irwin Industrial Tool Co 12413 Countersink Drill Bit 3/4in

Product Description

The IRWIN INDUSTRIAL TOOL CO 12413 is a 3/4 inch high speed steel countersink drill bit designed for fast, accurate countersinking in a wide range of machinable materials. The tip is milled and precision ground to an 82-degree angle, delivering clean, consistent entry points for flathead fasteners. A black oxide coating provides corrosion resistance and helps the bit run cooler under load. Five flutes reduce vibration during operation, which improves hole quality and extends tool life. The 1/4 inch round shank is compatible with standard drill chucks. This bit is sold in a package of 5 units.

This countersink bit is suited for metalworking, woodworking, and general fabrication tasks where flush fastener seating is required. The 82-degree geometry is the standard angle for most flathead machine screws and matches the countersink specifications found in common machining and assembly applications. It is a practical choice for electricians, HVAC installers, plumbers, and general contractors who need reliable countersinking in sheet metal, aluminum, mild steel, wood, and similar materials.

Key Features

• Precision-ground 82-degree tip for accurate countersinking in most machinable materials
• High speed steel construction for durability and heat resistance
• Black oxide coating for corrosion resistance and reduced friction
• 5-flute design minimizes vibration and improves cut quality
• 1/4 inch round shank fits standard drill chucks
• Sold as a package of 5 bits

Compatibility

Designed for use in standard drill chucks accepting a 1/4 inch round shank. Suitable for countersinking most machinable materials including mild steel, aluminum, wood, and plastics at the standard 82-degree flathead fastener angle.

Installation Notes

Install the shank securely into a drill chuck before use and confirm the chuck is fully tightened. Power down or unplug the drill before changing bits. Use appropriate eye protection and work-holding devices when countersinking metal. Reduce feed pressure and use a cutting lubricant when working in harder metals to preserve the cutting edge.