Cylindrical screws with code EN61T612 are precision fasteners widely used throughout the MAN L21/31 engine for securing components where reliable clamping and accurate alignment are essential. Manufactured from high-strength alloy steel, these screws are designed to withstand vibration, thermal cycling, and repeated tightening during maintenance. Their consistent quality and mechanical strength ensure secure assemblies, supporting safe operation and long service life of the engine in demanding industrial and marine conditions.