1/4-20X1 1/2 Unslotted Ind Hex washer Serrated Self Drilling Screw Full Thread Zinc (Pack Qty 1,250) BC-1424KWSMS

Used to attach plywood, soft wood or metal to metal. Serrated washer design adds greater holding power to components subject to vibrations caused by repeated movements. The 1/4-inch diameter screws, for instance, are commonly used to attach reinforcing strut or L-angle to garage doors AISI 1016 - 1024 or equivalent steel