The U-bolts are typically either 1/2-inch or 9/16-inch in diameter, depending on the axle manufacturer and tube size. The torque values below reflect common industry standards used for Dexter-style axle and suspension systems:
Most common setup:
1/2"-20 U-bolts (Grade 8): 90 ft-lb (122 N·m)
Alternate setup (less common):
9/16"-18 U-bolts: 120–130 ft-lb (163–176 N·m)




