U-Bolt, Long Tangent, Steel, Finish Hot Dipped Galvanized, Thread Size 1/2 In.-13, Thread Length 3 in, Inside Length 6 1/4 in, Inside Width 4 1/16 in, Pipe Size (In.) 3 1/2 in, Characteristics ASME B18.2.2- ASTM A563 Grade A, Includes (4) Nuts, Package Quantity 29