The plug H 27058 is a precision-machined closing element used in the Sulzer ASL25 engine to securely seal auxiliary openings in housings, channels, or fluid passages. Designed to withstand internal pressure, thermal cycling, and continuous vibration, it ensures a leak-free barrier that protects the internal systems from contamination and fluid loss. Its robust construction and accurate threading enable reliable installation and long-term sealing performance, contributing to system integrity, operational safety, and simplified maintenance procedures.