Standard U-Bolt, Standard U-Bolt, Steel, Finish Hot Dipped Galvanized, Thread Size 1/2 In.-13, Thread Length 1 1/2 in, Inside Length 5 in, Inside Width 3 1/2 in, Pipe Size (In.) 3 in, Characteristics ASME B18.2.2- ASTM A563 Grade A, Includes (2) Nuts, Package Quantity 5