Hexagon Flange Head Self-Drilling Screw 12-14x20

Product Overview
This product is a dedicated integrated waterproof self-drilling screw for outdoor steel structures, equipped with an integrated EPDM composite sealing washer and featuring a CL3 long-lasting anti-corrosion coating on the surface. It integrates drilling, tapping, and waterproof fastening into one unit, requiring no pre-drilling and no additional sealant application, while combining high load-bearing capacity with outdoor rust resistance. It is a standard fastener for color steel buildings and light-gauge steel structures.

Product Applications
Fixing of color steel tiles and sandwich panel roofing/walls in workshops, warehouses, and prefabricated temporary buildings;
Assembly of light steel canopies, enclosures, guardrails, and other light steel structures;
Outdoor metal components such as photovoltaic brackets, metal curtain walls, and ventilation ducts;
Suitable for 0.4–5mm color steel sheets, cold-rolled steel, and aluminum alloys, applicable to inland factory areas and low-salt-spray coastal regions.