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 a reliable barrier against unauthorized entries. General hardware runs the gamut from door knocker viewers and stops to clothes hooks, flag pole and handrail brackets. Zinc plating offers corrosion resistance for all of your functional hardware needs.