Standard U-Bolt, Standard U-Bolt, 304 Stainless Steel, Finish Plain, 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