Standard U-Bolt, Standard U-Bolt, Stainless Steel, Finish Plain, Thread Size 1/2 In. -13, Thread Length 3 in, Inside Length 4 in, Length (In. ) 6 1/4 in, Inside Width 3 21/32 in, Pipe Size (In. ) 3 in, Characteristics UL and ASTM F593 Standards, Includes (4) 316 Stainless Steel Hex Nuts. This item has been restricted from sale in the following state (s): []