The nut with code K 27039 is a precision fastener designed specifically for securing stud K 11122 within the ZV40/48 diesel engine assembly. Built to resist vibration, high torque, and thermal cycling, it plays a critical role in maintaining mechanical stability across connected components such as covers, manifolds, or housings. Its precise threading and high-strength alloy composition ensure tight fastening without loosening during operation, contributing to engine safety and long-term reliability.