The lock nut K 28037 is a specialized fastening component designed to secure element K 28034 within the Sulzer ZV40/48 engine assembly, preventing loosening under operational conditions. Equipped with a locking feature, it maintains a constant clamping force even in the presence of vibration, dynamic loading, and thermal cycling. Manufactured from high-grade materials with precise threading, the lock nut ensures reliable preload and long-term joint stability. Its function is critical in safeguarding the integrity of the connected components, reducing the risk of mechanical failure due to loosening. By ensuring secure fastening and maintaining assembly integrity, the K 28037 lock nut contributes to the safe, efficient, and reliable operation of the engine system.