The tie rod ensures a secure connection between the cylinder head and crankcase. In the MAN L21/31 engine, it plays a vital role in distributing internal forces evenly, preventing deformation, and maintaining engine integrity under heavy-duty conditions.

The seal ring M20X26 is a small yet essential component in the MAN L21/31 engine, used to maintain fluid-tight connections in high-pressure and high-temperature environments. It prevents leaks, supports engine cleanliness, and contributes to long-term performance and efficiency.

Cylindrical pins, code EN1P1228, are precision alignment tools used throughout the MAN L21/31 engine to ensure accurate positioning of components such as housings, covers, and structural subassemblies. These hardened steel pins are essential for maintaining mechanical alignment, preventing rotational slip, and ensuring consistent load distribution across connected parts. By securing the geometry of critical interfaces, cylindrical pins play a vital role in minimizing wear and maintaining the long-term reliability of the engine.

Plug screws under code EN47AR36 are specially designed fasteners used in various MAN L21/31 engine applications to seal threaded ports, inspection holes, or auxiliary component openings. These screws ensure secure closures that withstand pressure and thermal stress while also allowing maintenance access when needed. Made from corrosion-resistant materials and manufactured with precision threads, plug screws contribute to the engine’s reliability and help prevent fluid leaks or contamination.

The seal ring with code 06.56200-0724.0 is a critical component for maintaining airtight and leak-proof connections within the MAN L21/31 engine. Typically used in high-pressure areas such as cylinder interfaces or fluid line couplings, the seal ring prevents the escape of oil, coolant, or combustion gases. Its resistance to heat, pressure, and chemical corrosion makes it essential for maintaining system integrity and ensuring long-term operational efficiency and safety in demanding marine or industrial environments.

The screw plug with code 06.08042-0127.A, conforming to DIN908 standards and sized M60x2ST, is a specialized fastener designed to securely seal threaded openings in the MAN L21/31 engine’s oil or coolant systems. Made for high reliability under pressure and thermal cycling, this plug ensures leak-proof closure while allowing for service access when needed. Its precision engineering and robust construction contribute to the overall safety and maintenance efficiency of the engine.

The gasket with code 06.56936-2355.0 serves as a vital sealing element within the MAN L21/31 engine, preventing fluid or gas leakage between critical surfaces such as cylinder heads, covers, and manifolds. Engineered from high-temperature and pressure-resistant materials, this gasket plays an essential role in maintaining combustion efficiency, system integrity, and environmental compliance. Its proper fit and function are indispensable for avoiding performance losses and potential mechanical failures.

The material specification document with code 11.00196-0001 is a critical reference that defines the exact chemical and mechanical properties required for components used in the MAN L21/31 engine. It outlines the quality standards, treatment processes, and tolerances that ensure each part meets the engine's high-performance and durability requirements. Strict adherence to this specification guarantees component reliability under demanding marine and industrial conditions, supporting engine longevity and operational safety.

Cylindrical pins with code EN1P1228 are precision alignment elements used throughout the MAN L21/31 engine to ensure the correct positioning of components such as casings, housings, and covers. Manufactured from hardened steel, these pins provide repeatable and stable assembly, reducing mechanical wear and improving servicing accuracy. Their role in maintaining geometric consistency across critical joints makes them vital for the long-term mechanical stability of the engine.

The cap nut M33x2, bearing code 11.01296-0071.A, is a specialized fastening component used in conjunction with tie rods or studs in the MAN L21/31 engine. Its robust design allows it to sustain repeated tightening cycles and maintain a secure hold under vibration and thermal stress. Accurate torque application on the cap nut ensures a leak-free and vibration-resistant seal, making it a small yet indispensable part of engine reliability during long-term operation.