Standard U-Bolt Standard U-Bolt 304 Stainless Steel Finish Plain Thread Size 5/16 In.-18 Thread Length 1 1/8 in Inside Length 2 11/16 in Inside Width 1 3/4 in Pipe Size (In.) 1 1/4 in Characteristics ASME B18.2.2- Stainless Steel 304 Includes (2) Nuts