sturiz 45PCS 5.5x50 mm Self Drilling Screws for Metal Roofing Screws with Rubber Washers Hex Head Self Tapping Screws und 2 M8 Hex Socket Tech Screws Zinc Corrugated Roof Fixings for Tin Roof

Product Content: This kit contains 45 self drilling screws (5.5 x 50 mm) with integrated sealing washers + 2-piece M8 hex bit socket set. High-Quality Galvanized Steel: These roofing screws bolts are made from high-strength carbon steel with zinc plating, offering excellent corrosion resistance and weather durability. Special coating technology prevents damage during installation. Self-Drilling Design: These roofing screws with rubber washers feature sharp drill points that penetrate metal sheets directly without pre-drilling (Note: Not suitable for aluminum plates). Sealing & Leak Prevention: These tech screws for metal are equipped with built-in EPDM rubber washers that effectively prevent rainwater penetration, accommodate thermal expansion/contraction, and maintain long-term waterproof performance. Hex Mechanical Structure: The external hex head design of these hex head timber screws provides higher torque, prevents slipping and breakage, and supports efficient installation with socket wrenches or power tools. Professional Application: These self tapping bolts are specifically designed for securing overlapping sections of corrugated roof fixings, trapezoidal sheets, corrugated panels, steel structure edges, and drainage gutters. Specifications: Size: 5.5 x 50mm Quantity: 45pcs Accessories: 2pcs M8 Hex Socket (for power tools) Notes: 1.Not recommended for aluminum plates due to material characteristics. 2.Manual measurement may have 1-2mm size error. 3.Recommended to use matching socket bits to avoid coating damage.