The nut designated as K 81190 serves as a locking and fastening component for threaded pin K 81192 and support K 81260 in the ZV40/48 engine structure. Engineered for high-strength applications, it ensures that connected parts remain securely fastened under dynamic loads and vibrations. Its compatibility with both components highlights its role in maintaining structural integrity and alignment within the engine’s support system. Proper tightening and periodic inspection of this nut are essential for the reliable operation of engine-mounted assemblies.