Standard U-Bolt Standard U-Bolt 304 Stainless Steel Finish Plain Thread Size 5/16 In.-18 Thread Length 1 3/8 in Inside Length 2 3/16 in Inside Width 1 in Pipe Size (In.) 1/2 in Characteristics Has Coarse Rolled Threads for Steel or Wrought Iron Pipe Sizes Includes 2 Nuts Package Quantity 10