U-Bolt, Long Tangent, 304 Stainless Steel, Finish Plain, Thread Size 1/2 In.-13, Thread Length 3 in, Inside Length 5 7/32 in, Inside Width 2 15/16 in, Pipe Size (In.) 2 1/2 in, Characteristics Has Coarse Rolled Threads, for Steel or Wrought Iron Pipe Sizes, Includes 4 Hex Nuts