Back Home / Fasteners / Washers / LOCK WASHER EXTERNAL ZINC 5/8″ EXTERNAL TOOTHED LOCK WASHER EXTERNAL ZINC 5/8″ EXTERNAL TOOTHED SKU: ELW58 Categories: Fasteners, Washers A hardened circular washer with twisted prongs or teeth which extend out from the outer edge of the washer. Most common of all tooth-lock washers. Offers the greatest locking efficiency since the teeth are on the largest radius. Made from spring steel, zinc plated. Rockwell Hardness: C40-50 Inside Diameter: Min .641 Max .663 Outside Diameter: Min 1.045 Max 1.070 Thickness: Min .042 Max .050 Case Quantity: 100 Log In For Pricing