Standard U-Bolt Standard U-Bolt Steel Finish Hot Dipped Galvanized Thread Size 1/4 In.-20 Thread Length 1 3/8 in Inside Length 3 1/4 in Inside Width 2 in Pipe Size (In.) 1 1/2 in Characteristics ASME B18.2.2- ASTM A563 Grade A Includes (2) Nuts Package Quantity 10