Product Description Whether for home, farm, builder or industrial customers, National has all the right hardware in the sizes and finishes you need. With over a century of service National is committed to maintaining the highest level of product quality, innovation and manufacturing technology. Providing quality hinges for all of your industrial, residential, commercial and specialty needs. Strap and T hinges are made from the best materials available and are highlighted by desirable finishes and top-of-the-line Delrin bearings where applicable. A proprietary Weather Guard finish is three times more corrosion resistant than the competition. This galvanized finish offers corrosion resistance for products used where corrosive elements, such as salt air, are present. From the Manufacturer Whether for home, farm, builder or industrial customers, National has all the right hardware in the sizes and finishes you need. With over a century of service National is committed to maintaining the highest level of product quality, innovation and manufacturing technology. Providing quality hinges for all of your industrial, residential, commercial and specialty needs. Strap and T hinges are made from the best materials available and are highlighted by desirable finishes and top-of-the-line Delrin bearings where applicable. A proprietary Weather Guard finish is three times more corrosion resistant than the competition. This galvanized finish offers corrosion resistance for products used where corrosive elements, such as salt air, are present.