Standard U-Bolt, Standard U-Bolt, Steel, Finish Hot Dipped Galvanized, Thread Size 5/16 In.-18, Thread Length 2 in, Inside Length 3 5/8 in, Inside Width 1 3/8 in, Pipe Size (In.) 1 in, Characteristics ASME B18.2.2- ASTM A563 Grade A, Includes (2) Nuts, Package Quantity 140