1/2 x 1-1/4 Self-Drilling Hex Head Screw, Zinc Plated

Screw, Self-Drilling, Hex Washer Head, 1/2in x 1-1/4in, Zinc Plated Steel, Drill Point, 3/4in Hex, Drills, taps, and fastens metal-to-metal in one operation without pre-drilling