Detailed Product Description Low carbon steel ACME rod is made from c1018 steel having a Rockwell hardness of HRB 72 and a minimum tensile strength of 64,000psi Surface treating: original colors, blacken, plated zinc, hot dipped galvanized zinc, and dacromet zinc Rod diameter: 1/4 to 2 1/2 inches Available in various lengths Rod grades: 2, 5, 8, and 10