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The HILLMAN FASTENERS 41651 is a self-drilling screw with a hex washer head designed to drill, tap, and fasten in a single operation without a pre-drilled pilot hole. Made from steel with a zinc-plated finish for corrosion resistance, this screw features a No. 3 driver point and measures size 10 by 2 inches. Each pack contains 25 pieces. The 5/16-inch driver bit size is compatible with standard hex-head power drivers. This fastener is suited for use by electricians, HVAC technicians, plumbers, and general contractors who need a reliable one-step fastening solution in metal-to-metal or metal-to-substrate applications.
Self-drilling screws like the 41651 are commonly used in light commercial and residential construction, HVAC duct work, metal framing, electrical enclosures, and mechanical equipment mounting. The hex washer head provides a broad bearing surface and positive driver engagement, making it well suited for power-tool installation in production or field-service environments where speed and reliability matter.
Designed as a standard self-drilling hex washer head screw suitable for typical light-gauge metal fastening applications in HVAC, electrical, and general construction trades.
Self-drilling screws are installed by qualified tradespeople using a power driver fitted with a 5/16-inch hex bit. No pre-drilling is required, but driving speed should be controlled to avoid overdriving or stripping the fastener. Always verify that the screw length and point rating are appropriate for the material thickness being fastened before installation.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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