Standard U-Bolt, Standard U-Bolt, Aluminum, Finish Plain, Thread Size 3/8 In.-16, Thread Length 1 1/4 in, Inside Length 2 1/4 in, Inside Width 1 1/4 in, Pipe Size (In.) 3/4 in, Characteristics Has Coarse Rolled Threads, for Steel or Wrought Iron Pipe Sizes, Includes 2 Nuts