National Hardware’s 3816 x 72 Threaded Rod is designed for hanging, connecting, clamping and supporting in plumbing, heating and electrical applications and other doityourself projects Corrosionresistant 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