Standard U-Bolt Standard U-Bolt Steel Finish Zinc Plated Thread Size 1/2 In.-13 Thread Length 3 in Inside Length 7 13/16 in Inside Width 5 5/8 in Pipe Size (In.) 5 in Characteristics Has Coarse Rolled Threads for Steel or Wrought Iron Pipe Sizes Includes 4 Hex Nuts Package Quantity 5