The locking spring washer, code 06.16169-0006.1, is designed to exert consistent tension on fasteners, helping to maintain clamping force in the MAN L21/31 engine even under thermal cycling and vibration. Its spring-like profile compensates for any loosening tendencies in bolted connections, ensuring mechanical reliability over time. Commonly used in high-stress areas, this washer is vital for the safe and uninterrupted function of engine components.

The cover, code 11.01213-0061.A, serves as a protective enclosure in the MAN L21/31 engine, designed to seal off internal engine compartments from external contaminants such as dust, moisture, or debris. Engineered with precision fit and durable materials, this component not only helps retain oil and fluids but also contributes to thermal insulation and noise reduction. Its presence is crucial for preserving internal cleanliness and ensuring reliable engine performance under harsh operating conditions.

The lock washer with code 06.16169-0003.0 is a compact but essential component in the MAN L21/31 engine, designed to prevent loosening of fasteners under dynamic loads. Its toothed or serrated structure bites into the mating surfaces, offering mechanical resistance against vibration-induced rotation. This washer ensures that bolts and nuts remain securely fastened, thereby safeguarding the stability of critical engine joints and assemblies during prolonged operation.

The hexagon screw, code EN61V1230, is a standard threaded fastener used widely in the MAN L21/31 engine assembly. Known for its hexagonal head, it allows for strong torque transfer and secure fastening of engine components. Engineered from high-grade steel, it withstands operational stress, vibration, and high temperatures, playing a vital role in maintaining structural cohesion across various mechanical connections.

The washer, code 06.16169-0004-1.A, serves as a flat, load-distributing element placed between a fastener and the engine surface. It ensures even pressure application and protects mating surfaces from deformation or damage during tightening. In the MAN L21/31 engine, this component contributes to joint stability, corrosion resistance, and proper alignment of components during assembly or servicing operations.

The locking spring washer with code 06.16169-0004.2 is a crucial safety component used in bolted connections within the MAN L21/31 engine. Designed to prevent nuts and bolts from loosening under vibration and thermal expansion, this washer exerts a continuous tension against the fastener head. Its split-ring, spring-like design provides reliable anti-rotation performance, making it essential in securing structural and dynamic parts in both marine propulsion and stationary engine applications.

The pipe identified by code 01.93105-2069.C is a robust fluid transport element in the MAN L21/31 engine, commonly employed in oil, cooling water, or air systems. Engineered to withstand pressure, temperature, and vibration, it ensures consistent and uninterrupted flow between engine components. Its correct routing and durability are key to maintaining thermal balance and fluid integrity across the engine’s operating cycles.

The guide pipe with code 11.01132-0023.A serves as an alignment and routing component within the MAN L21/31 engine, often used to position rods, wires, or fluids through designated channels. Its sturdy cylindrical design maintains directional accuracy and prevents chafing or vibration damage, especially in dynamic environments. This part plays a subtle yet critical role in supporting internal coordination and mechanical reliability.

The straight male stud coupling, code EN8AB12.1, is a vital connector used within the MAN L21/31 engine’s fluid systems. Designed for high-pressure applications, it provides a reliable, leak-proof connection between pipes or hoses, often used in fuel, oil, or hydraulic lines. Its durable metal construction and precision threading ensure long service life and secure performance, even under the demanding conditions of marine propulsion or industrial operation.

Round steel bars, code EN43AE0090, serve as foundational raw materials in the production and repair of various MAN L21/31 engine parts. Known for their high tensile strength, uniform diameter, and machinability, these bars are transformed into essential engine components such as pins, shafts, and mounting elements. Their metallurgical reliability ensures they meet the demanding structural and thermal requirements of diesel engines operating under continuous load.