PVC Washer: The PVC washer is the primary component of these screws and is pre-assembled onto the screw shaft. The washer is typically made from polyvinyl chloride (PVC), a durable and flexible plastic material known for its weather resistance and chemical stability. The PVC washer acts as a seal between the screw and the surface it is being attached to, preventing water infiltration and potential leaks.
Thread Design: PVC washer assembled screws typically have coarse threads designed to grip into the material effectively, providing a strong and secure connection. Some screws may have self-drilling or self-tapping points to facilitate easy installation without the need for pre-drilled pilot holes.
Head Types: These screws come in various head types, including hex head, washer head, and pancake 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 pancake head screws provide a larger bearing surface for distributing the load and enhancing pullout resistance.
Materials: PVC washer assembled screws are typically made from hardened steel, stainless steel, or other materials with high strength and corrosion resistance. The PVC washer provides additional protection against corrosion and weathering, ensuring long-lasting performance in outdoor environments.
Size: These screws come in various lengths and diameters to accommodate different material thicknesses and installation requirements. The most common lengths for PVC washer assembled screws range from 1 inch to 3 inches, with longer lengths used for thicker materials or when attaching to thicker structural supports.
Applications: PVC washer assembled screws are commonly used in roofing, siding, and construction applications where a watertight seal is required. They provide a secure and leak-proof fastening solution while also protecting against water damage and potential leaks in the building envelope.
