21AX391
Nut
Mack

This high-quality nut is designed to secure various fasteners in heavy-duty truck assemblies, ensuring reliable and safe connections. Its precise threading and robust construction provide a secure fit, preventing loosening due to vibrations or operational stresses. Suitable for a wide range of applications, this nut is essential in maintaining the integrity of critical components such as suspension, drivetrain, and chassis assemblies. Proper torque application during installation is vital to maximize its holding power. Regular inspection and replacement are recommended to avoid potential failures that could compromise vehicle safety. This part is a fundamental element in ensuring the durability and safety of your truck’s mechanical systems. Source One Parts Center supplies this nut to support your maintenance and repair needs efficiently.