Painted Head Lap Stitch ScrewHillman Item #48014
The lap stitch screw is a self-drilling screw, commonly used for panel to panel side lap, end lap and other stitch applications. You'll also find this screw ideal for fastening two thin sheets of overlapping roof material. It possess a drill point which enables the screw to drill its own hole in thin gauge steel; no pre-drilled hole is 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, this screw has a neoprene washer that provides a water-tight seal, and prevents corrosion between surfaces.