This genuine Case-IH 82039004 lock nut is an essential OEM fastening component, engineered for reliable performance in demanding agricultural and construction environments. Featuring an M12x1.5 thread and a height of 12 mm, it is designed to resist loosening caused by vibration, ensuring the integrity of critical assemblies. With an 18 mm wrench size, this lock nut provides a precise fit and durable solution for a wide range of compatible Case-IH machinery models.