U-Bolts have to be torqued and tightened using a cross pattern sequence. Follow these instructions to ensure the correct torque on your U-bolts. Start by tightening number 1 to a light torque, then move to number 4, 2 and then 3 with the same light torque. Using the same sequence, fully torque the U-bolt nuts to the correct foot pounds determined by the U-bolts diameter. For U-bolt torque specifications click here https://uboltstore.com/pages/u-bolt-torque-specifications