#12 x 3 inch HWH Zinc Plated #5 Point Self-Drilling Screws 1m Box XPG4_C0AVV55

This self-drilling screw drills a hole and taps a thread in a single operation. The drill point is significantly longer than that of a # 2 or #3 point drill screw. Designed to drill through a greater thickness of steel than a standard self drilling screw. The drilling point must fully penetrate all pieces of material being fastened before the first thread engages. The washer and hex head are formed together as one piece. The underside of the hex washer head provides a flat bearing surface that reduces the likelihood of crushing mating surfaces when you drive this screw.