Since trailer axle U-bolts are some of the trailer components that experience the most wear and break most frequently, it's a good idea to keep some extras, like these Uriah Products square U-bolts, on hand. That way you can monitor your existing U-bolts and replace them at the first sign of wear, allowing you to avoid a dangerous, time-consuming breakdown on the road. These U-bolts are 5-1/4" long and accommodate 2" axles, and they come with the necessary nuts for installation. | Uriah Square U-Bolt and Nut | Size 5-1/4" x 2"