The cylindrical screws with code EN61T612 are essential fastening elements used throughout the MAN L21/31 engine to secure components under high mechanical loads and vibration. Featuring a cylindrical head design that allows precise torque application, these screws ensure reliable clamping force and accurate alignment of engine parts. Manufactured from high-strength steel, they are engineered to withstand thermal cycling, dynamic stresses, and long-term operation, making them indispensable for maintaining structural integrity and operational safety in marine and power generation applications.