#8-18 x 1/2" Zinc Plated Steel Hex Washer Head Self-Drilling Screws

Box of 40.

A self-drilling screw, or tek screw, is similar to a sheet metal screw, but it has a drill-shaped point to cut through the substrate to eliminate the need for drilling a pilot hole. Ideal for any project involving light gauge sheet metal, awnings, door and window frames, gutters, sheds.