U-Bolt, Square Bend, Steel, Finish Hot Dipped Galvanized, Thread Size 3/8 In.-16, Thread Length 1 1/2 in, Inside Length 3 in, Inside Width 4 in, Characteristics ASME B18.2.2- ASTM A563 Grade A / ASME B18.21.1 Type A, Includes (2) Nuts, (2) Washers, Package Quantity 72