With over a century of service National is committed to maintaining the highest level of product quality, innovation and manufacturing technology. Providing latching and fastening options for all of your indoor and outdoor uses. Thanks to a proprietary WeatherGuard finish, Zinc Plated eye, U-bolts and turnbuckles last three times longer than the competition. Continued expansion of stainless steel bolts, including heavy-duty applications, put us well ahead of the competitors. Zinc plating offers corrosion resistance for all of your functional hardware needs.