Here are the torque specifications for our NF fine thread U-bolts. The recommended foot-pound values for tightening the U-bolt nuts vary depending on the U-bolt diameter. It's important to adhere to these specifications for proper installation. After the initial 100 miles of travel or 2-3 weeks of use, it is advisable to recheck the U-bolt torque and retorque if necessary. This maintenance ensures the continued integrity and reliability of the U-bolts. For a U-bolt torque pattern visual aid click here https://uboltstore.com/pages/u-bolt-torque-pattern-visual-aid

Torque Specs:

• 3/8" Diameter U-Bolt: Torque Specification - 26 Foot Pounds
• 7/16" Diameter U-Bolt: Torque Specification - 44 Foot Pounds
• 1/2" Diameter U-Bolt: Torque Specification - 90 Foot Pounds
• 9/16" Diameter U-Bolt: Torque Specification - 130 Foot Pounds
• 5/8" Diameter U-Bolt: Torque Specification - 180 Foot Pounds
• 3/4" Diameter U-Bolt: Torque Specification - 315 Foot Pounds
• 7/8" Diameter U-Bolt: Torque Specification - 500 Foot Pounds
• 1" Diameter U-Bolt: Torque Specification - 1,010 Foot Pounds
• 1-1/8" Diameter U-Bolt: Torque Specification - 1,140 Foot Pounds
• 1-1/4" Diameter U-Bolt: Torque Specification - 1,550 Foot Pounds