Back Home / Fasteners / Washers / LOCK WASHER EXTERNAL ZINC 1/4″ EXTERNAL TOOTHED LOCK WASHER EXTERNAL ZINC 1/4″ EXTERNAL TOOTHED SKU: ELW14 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 .256 Max .267 Outside Diameter: Min .494 Max .510 Thickness: Min .023 Max .028 Case Quantity: 100 Log In For Pricing