Timco BMS22W16 Metal Construction Stitching Screws - For Sheet To Sheet - Hex - Epdm Washer - Bi-Metal - Exterior - Silver Organic 6.3 X 22 Box 100

Used For Stitching Two Metal Roofing Sheets Together Without The Need To Pre-Drill A Hole (Max. 1.6Mm). Self-Drilling Point And Tapered Shank With A Washered Hexagon Head.PTDTIMBMS22W16