The joint ring K 55044 is a precision sealing element designed for use with screw plug K 55043 in the fuel injection pump system of the Sulzer ZV40/48 engine. Positioned between the screw plug and the housing surface, its function is to ensure a tight, leak-free seal under operating pressure and varying thermal conditions. Engineered to resist fuel exposure, vibration, compression forces, and temperature fluctuations, the joint ring maintains reliable sealing characteristics throughout long service periods. Manufactured from high-quality sealing materials with optimized resistance to chemical degradation and deformation, it ensures stable contact pressure and dependable sealing performance. Accurate dimensional tolerances allow proper fit and even load distribution during tightening. By preventing leakage and supporting pressure integrity within the fuel injection system, the K 55044 joint ring contributes to operational safety, fuel system reliability, and efficient engine performance.