Standard U-Bolt Standard U-Bolt Steel Finish Zinc Plated Thread Size 3/8 In.-16 Thread Length 2 3/8 in Inside Length 3 23/32 in Inside Width 1 11/16 in Pipe Size (In.) 1 1/4 in Characteristics ASME B18.2.2- ASTM A563 Grade A Includes (4) Nuts Package Quantity 5