1/4-14X7/8 Hex Flange Self Drill #1PT Rubber Washer Full Thread Zinc 1000hours Salt Spray (Pack Qty 1,000) BC-1414KWW1HC

An unslotted hex head tapping screw with a conical flange and free spinning, captive rubber washer. The underside of the flange in undercut, creating a space for the rubber washer to be seated. Screw has spaced threads and a shorted drill point which drills its own hole Designed to fasten overlapping longitudinal edges of steel deck (also known as “side-lap”). When these edges are adjacent to each other, joining the sections adds strength to the entire structure. The rubber washer creates a leak-proof seal