Thread Design: Sandwich panel screws typically have self-drilling or self-tapping points and coarse threads designed to cut through the outer metal sheets and grip into the structural supports (e.g., steel or aluminum frames) with minimal effort. The threads may have a wide pitch to provide strong and secure fastening.
Head Types: Sandwich panel screws come in various head types, including hex head, washer head, and flange head, among others. The choice of head type depends on the specific application and desired appearance. Hex head screws are commonly used for applications where a wrench or socket is required for installation, while washer head and flange head screws provide a larger bearing surface for distributing the load.
Materials: Sandwich panel screws are typically made from hardened steel, stainless steel, or other materials with high strength and corrosion resistance. They may also be coated or plated with zinc, phosphate, or other finishes to enhance durability and prevent corrosion, especially in outdoor or corrosive environments.
Sealing Washers: Some sandwich panel screws come with integrated sealing washers made from EPDM rubber or other materials. These washers provide a waterproof seal between the screw and the outer metal sheets of the sandwich panel, helping to prevent water infiltration and potential leaks.
Size: Sandwich panel screws come in various lengths and diameters to accommodate different panel thicknesses and installation requirements. The most common lengths for sandwich panel screws range from 1/2 inch to 3 inches, with longer lengths used for thicker panels or when attaching to thicker structural supports.
Applications: Sandwich panel screws are used in a wide range of construction applications where attaching sandwich panels to structural supports is required. Common applications include roofing, wall cladding, cold storage facilities, industrial buildings, and agricultural buildings.
