Standard U-Bolt Standard U-Bolt 304 Stainless Steel Finish Plain Thread Size 5/8 In.-11 Thread Length 3 3/4 in Inside Length 9 1/2 in Inside Width 6 3/4 in Pipe Size (In.) 6 in Characteristics Has Coarse Rolled Threads for Steel or Wrought Iron Pipe Sizes Includes 4 Hex Nuts