The SERTO screwed union coded K 87162 is a precision-engineered connector used to securely join sections of the fuel piping system in the Sulzer ZV40/48 diesel engine. Designed for high-pressure environments, it features a tight-sealing thread system that ensures leak-free operation even under thermal expansion and vibration. Known for ease of installation and reusability, the SERTO design is favored in critical fuel delivery systems where reliability and maintenance access are priorities. This union plays a key role in maintaining uninterrupted fuel flow and overall system integrity.