Hex washer head sheet metal screws. Self-drilling points that drill, tap, and fasten in 1 operation. Good for attaching almost any type of material to metal. Zinc. 100-piece pack.
These self-drilling screws are used in wood, fiberglass and metal, and they possess a drill point enabling it to drill in its own hole in thin gauge steel. The sharp threads create their own mating thread when drilled into the material. No pre-drilled pilot holes necessary.