Teks #9 x 1-1/2 in. External Hex Zinc Plated Steel Hex Washer Head Roofing Screws (100-Pack) 21404 - The Home Depot
How to build a Patio Roof with Polycarbonate sheets | installation guide - ePlast.com
Teks #12 x 1-1/2 in. External Hex Drive Washer Head Roofing Screws (300-Pack) 21422 - The Home Depot
Polycarbonate Sheet Screws and Fixings - Vulcan Plastics
Amazon.com: Metal Roofing Screws: (1000) 10 x 1" Brown Hex Head Sheet Metal Roof Screw. Self Starting Metal to Wood siding Screws. EPDM Washer. Colored Head : Industrial & Scientific
EAGLE 1 (250 Count) Metal Roofing Screws Painted Hex Washer Head Sheet Metal Roof Screw. Self Starting/self Tapping Metal to Wood, Sheet Metal Roofing siding Screws (3", Evergreen) - Walmart.com