Hillman #12 - 14 x 1-1/2 In. Washer Head Self-Drilling Sheet Metal Screw (100 Ct.)

Self-drilling screws are manufactured for use in wood, fiberglass and metal. They possess a drill point which enables the screw to drill its own hole in thin gauge steel; no pre-drilled holes are necessary. The sharp threads create their own mating thread when drilled into the material, and provide a stronger grip to your surface. Perfect for roofing construction, these screws have a neoprene washer that provides a water-tight seal, and prevents corrosion between surfaces. Zinc. 100-piece per package.

• Designed for power driving wood or metal-to-metal
• Screw designed to drill its own hole, tap mating threads, and fasten firmly in one operation
• Steel-backed neoprene washer creates a watertight seal
• Zinc plating offers moderate protection against rust and corrosion