Back Home / Fasteners / Washers / FLAT WASHER USS ZINC 7/8″ FLAT WASHER USS ZINC 7/8″ SKU: FW78 Categories: Fasteners, Washers Used to improve stress distribution, and to span large holes. USS PATTERN. Made from low carbon steel, zinc plated. Outside Diameter: 2-1/4″ Inside Diameter: 15/16″ Case Quantity: 25 Log In For Pricing