U-bolts are manufacutred from low allow, high strength steel. U-bolts up to 13" long have a typical yield strength of 90,000 PSI and a tensile strength of 120,000 PSI. The 14" and longer U-bolts typically have a 115,000 PSI yield and 133,000 PSI tensile strength. Thread type is National Fine Class 2A. Anticorrosion finish is either zinc or E-coat