Back Home / Fasteners / Washers / FLAT WASHER SAE ZINC 5/8″ FLAT WASHER SAE ZINC 5/8″ SKU: SFW58 Categories: Fasteners, Washers Used to improve stress distribution, and to span large holes. SAE PATTERN. Made from low carbon steel, zinc plated. Outside Diameter: 1-5/16″ Inside Diameter: 21/32″ Case Quantity: 50 Log In For Pricing