Standard U-Bolt, Standard U-Bolt, Steel, Finish Hot Dipped Galvanized, Thread Size 3/8 In.-16, Thread Length 2 3/8 in, Inside Length 3 7/16 in, Inside Width 1 3/8 in, Pipe Size (In.) 1 in, Characteristics ASME B18.2.2- ASTM A563 Grade A, Includes (4) Nuts