The self-locking nut K 42114 is an important securing component designed for the camshaft assembly of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Its primary function is to maintain a reliable threaded connection and the required clamping force while resisting unintended loosening caused by continuous engine vibration, cyclic mechanical loading, and repeated operating stresses. Secure fastening is particularly important in the camshaft system because any loss of clamping integrity or component positioning can affect alignment, increase mechanical movement and wear, and potentially influence the accuracy of engine timing. The K 42114 therefore requires precise thread geometry, adequate mechanical strength, dimensional stability, and dependable self-locking characteristics throughout its intended service life. During maintenance or overhaul, the nut and its mating threads should be examined for thread damage, deformation, corrosion, wear, or deterioration of the locking function, and replacement should be considered whenever secure locking can no longer be assured. By maintaining a stable and vibration-resistant fastening within the camshaft assembly, the K 42114 self-locking nut contributes to accurate component positioning, reliable camshaft operation, reduced risk of loosening, and long-term reliability of the ZV40/48 engine.