National Hardware's 1/2"-13 x 72" Threaded Rod is designed for hanging, connecting, clamping and supporting in plumbing, heating and electrical applications and other do-it-yourself projects. Corrosion-resistant galvanized finish. Can be drilled, cut, heated, or shaped. For interior and exterior applications. Meets ASTM A307 Grade A and ASTM A153.Coated with Weatherguard Protection to withstand harsh weather conditions and prevent corrosion.