Hillman Fasteners 41540 Self-drilling Screw 8-18x1/2 100pk

Product Description

The HILLMAN FASTENERS 41540 is a hex washer head self-drilling screw designed for fast, reliable fastening in metal-to-metal and light-gauge sheet metal applications. At a size of 8-18 x 1/2 inches, this screw features a hardened steel construction with a zinc finish for corrosion resistance. The self-drilling tip eliminates the need for a pre-drilled pilot hole, reducing installation steps and saving time on the job. Each package contains 100 screws, making it a practical option for HVAC techs, sheet metal workers, electricians, and other trade professionals who need consistent, high-volume fastening.

These screws are commonly used in light commercial and residential construction, including HVAC ductwork assembly, metal framing, electrical enclosures, and general sheet metal fabrication. The hex washer head provides a broad bearing surface for a secure, flush-mounted hold and is driven with a standard 5/16-inch hex driver or nut setter. The zinc plating makes them suitable for dry interior applications where mild corrosion resistance is required.

Key Features

• Self-drilling tip eliminates pilot hole requirement for faster installation
• Hex washer head provides wide bearing surface and easy driving with a nut setter
• Hardened steel construction for strength and reliable thread engagement
• Zinc finish offers corrosion resistance for interior applications
• 100-count pack supports high-volume fastening tasks
• Size 8-18 x 1/2 inches suits light-gauge sheet metal and thin metal panel work

Compatibility

Designed for use in light-gauge sheet metal, HVAC ductwork, metal framing, and electrical enclosure assembly where a self-drilling hex washer head fastener is the specified fastener type.

Installation Notes

These screws are installed by licensed HVAC technicians, sheet metal workers, and electricians using a power driver fitted with a 5/16-inch hex nut setter. Ensure the work material is within the rated thickness range for self-drilling screws of this size to achieve full thread engagement. Do not overdrive — stop driving when the washer head seats flush against the material to avoid stripping. Follow applicable codes such as SMACNA standards for ductwork fastening intervals.