(WELDING SCREWS): The welding screw has been developed to provide a strong permanent threaded fastener which becomes an Integral part of the assembly. It utilizes the principle of projection welding by means of multiple lugs applied to various head surfaces.
Type "U" (Underlug) for general application. Assembles easily into pre-located holes and fully utilizes head strength. Top surfaces of head designed for efficient welding anode contact.