Hillman 47221 Screw, #12 Thread, 1-1/2 in L, Coarse Thread, Washer Head, Hex Drive, Self-Drilling Point, Steel, 78 PK
This self-drilling screw is used in wood, fiberglass, metal and it possess a drill point enabling it to drill 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 are necessary.
Features:
- Coarse threads and self-drilling point eliminate need for a pilot hole
- Hex drive for simple installation
- Zinc-plated for moderate corrosion resistance