BILLET4X4 HD Axle U-BOLTS 3 inch x 8 inch - SET OF FOUR (4) for 3 inch axle tube (4X4 OFF-ROAD VEHICLES) IN STOCK  SHIPS TODAY! Sold in a set of four (4). Application: 3 inch axle tube. Dimensions: 3 inch Gap, 8 inches Long. APPLICATION: 3 inch axle tube 9/16 inch thread with 7/8 inch nut & lock washer.