Standard U-Bolt, Standard U-Bolt, Steel, Finish Zinc-Plated, Thread Size 3/8 In. -16, Thread Length 2 1/2 in, Inside Length 4 7/16 in, Inside Width 2 7/16 in, Pipe Size (In. ) 2 in, Characteristics ASME B 18.2. 2- ASTM A563, Grade A, Includes (4) Nuts, Package Quantity 5