Hillman Fasteners 47211 Self-drilling Hex Washer Head Screw

Product Description

The HILLMAN FASTENERS 47211 is a self-drilling, hex washer head screw designed for fast, reliable fastening in light-gauge metal and sheet metal applications. Each screw features a drill-point tip that eliminates the need for a pilot hole, combined with a self-tapping thread that cuts cleanly as the fastener drives. The hex washer head provides a broad bearing surface and positive driver engagement. Construction is zinc-plated steel for corrosion resistance in standard indoor or protected outdoor environments. This box contains 221 screws at a 10 x 1/2 inch size.

These screws are commonly used in HVAC ductwork fabrication, electrical enclosure assembly, metal framing, and general sheet metal work. The 10 x 1/2 inch size is a standard choice for joining thin-gauge panels, brackets, and duct components. Licensed tradespeople and experienced installers working in mechanical rooms, rooftop equipment, and light commercial construction regularly reach for this size and head style. The 221-count box format supports job-site and shop use where bulk quantity is practical.

Key Features

• Drill-point tip eliminates pilot hole drilling in light-gauge metal
• Self-tapping thread cuts on contact for fast installation
• Hex washer head delivers a wide bearing surface and reduces pull-through
• Zinc-plated steel construction provides corrosion resistance in standard service environments
• 221 screws per box for efficient stocking and job-site use
• Size 10 x 1/2 inch fits a wide range of sheet metal and ductwork applications

Compatibility

Designed as a standard self-drilling hex washer head fastener suitable for light-gauge sheet metal, HVAC ductwork, and metal panel assemblies where a 10 x 1/2 inch self-drilling screw is specified.

Installation Notes

Install with a hex-head driver bit and a variable-speed drill or screw gun set to appropriate torque to avoid stripping the head or overdriving through thin material. No pilot hole is required for light-gauge metal within the rated capacity of the drill point. Confirm base material gauge is within the design range of the drill point before driving. Follow applicable building and mechanical codes, including SMACNA ductwork standards where sheet metal work is involved.