The self-locking nut K 32383 is a specialized fastening and securing component designed for the worm gear K 32326 within the associated mechanism of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Its primary function is to maintain a secure threaded connection and retain the worm gear in its specified position while resisting unintended loosening caused by vibration, repeated loading, and movement during operation. Reliable locking is particularly important in worm-gear mechanisms because excessive axial movement or loss of correct positioning can affect gear engagement, increase mechanical wear, and potentially compromise the operation of neighboring components. Accurate thread geometry, suitable mechanical strength, dimensional stability, and dependable self-locking characteristics are therefore essential for long-term service. During overhaul or maintenance, the K 32383 nut, its mating threads, the K 32326 worm gear, and associated contact surfaces should be inspected for wear, deformation, or damage, and the fastening should be restored according to the specified assembly requirements. By maintaining secure positioning of the worm gear, the K 32383 self-locking nut contributes to stable gear engagement, reduced risk of loosening, reliable mechanical operation, and long-term durability of the ZV40/48 engine mechanism.