Standard U-Bolt, Standard U-Bolt, 304 Stainless Steel, Finish Plain, 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 Has Coarse Rolled Threads, for Steel or Wrought Iron Pipe Sizes, Includes 4 Hex Nuts