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