Standard U-Bolt Standard U-Bolt Steel Finish Hot Dipped Galvanized Thread Size 1/2 In.-13 Thread Length 1 1/2 in Inside Length 5 1/2 in Inside Width 4 in Pipe Size (In.) 3 1/2 in Characteristics ASME B18.2.2- ASTM A563 Grade A Includes (2) Nuts Package Quantity 5