Back Home / Fasteners / Washers / FLAT WASHER USS STAINLESS 3/8″ FLAT WASHER USS STAINLESS 3/8″ SKU: FW38SS Categories: Fasteners, Washers Used to improve stress distribution, and to span large holes. USS PATTERN. Used where parts are subject to corrosion. Made from 18-8 stainless steel. Outside Diameter: 1″ Inside Diameter: 7/16″ Case Quantity: 100 Log In For Pricing