The locking plate K 33422 is a safety fastening component designed to secure screw K 33421 against unintended loosening during engine operation. Its primary purpose is to maintain the integrity of bolted assemblies exposed to continuous vibration, cyclic loading, and thermal expansion within the Sulzer ZV40/48 engine. Manufactured from durable, corrosion-resistant materials with excellent mechanical strength, the locking plate provides a simple yet highly effective method of mechanical locking without affecting the serviceability of the assembly. Precision dimensions ensure proper engagement with the corresponding screw and adjacent components while facilitating straightforward installation during maintenance procedures. By preventing fastener movement and preserving assembly stability, the K 33422 locking plate contributes to improved operational safety, increased mechanical reliability, and extended service life of critical engine components.