8-18X5/8 6 Lobe Indented Hex Washer Serrated Self Drilling Screw Full Thread Zinc (Pack Qty 7,000) BC-0810KTWS

Type BSD: May be used to attach plywood, soft woods or composition board to metal, or attach metal to metal. Type CSD: The finer thread pitch reduces friction and driving torques. Type-CSD screws are normally used with thicker materials. The wafer head design allows the screw to set flush in wood and softer materials and provides a clean, finished appearance All self-drilling screws offer economical benefits: reduces labor and tooling costs; reduces or eliminates drill bits and tapsYou may also like 1/4-20X4 1/2 Six Lobe Flat Floor Board Screw Type F Black Phosphate (Pack Qty 300) BC-1472FTFB.