Hillman Washer Head Self Drilling Screws, 25-Pack, 41891, #12 x 1-1/4 IN

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.

FEATURES

• Self-drilling screws designed for power driving wood or metal to metal
• Drill point drills its own hole, taps mating threads and fastens firmly in one operation
• Steel-backed neoprene washer for water proofing
• Zinc finish for moderate corrosion protection
• No need to pre-drill a hole