The washer, code 06.16169-0004-1.A, is a precision load-distribution component used in numerous bolted joints throughout the MAN L21/31 engine. Installed between the bolt head or nut and the contact surface, it ensures uniform pressure distribution, protects machined surfaces from damage, and enables accurate torque transmission during assembly. By reducing localized stress and surface deformation, the washer contributes to improved reliability of fastening systems operating under high mechanical loads and vibration. Produced according to strict material and dimensional requirements, it offers excellent resistance to deformation and wear, helping maintain joint integrity and extending the service life of connected engine components.