Standard U-Bolt Standard U-Bolt Steel Finish Hot Dipped Galvanized Thread Size 5/16 In.-18 Thread Length 2 in Inside Length 4 1/2 in Inside Width 1 3/4 in Pipe Size (In.) 1 1/4 in Characteristics ASME B18.2.2- ASTM A563 Grade A Includes (2) Nuts Package Quantity 10