Bolt and screw – solutions for marine & industrial
Every engine relies on a secure and vibration-resistant fastening system. A high-quality bolt and screw setup holds together engine blocks, manifolds, and accessories across diesel, gas, and marine systems. In industrial applications, engine screws and motor bolts provide structural stability, resist thermal cycling, and support precision alignment. For marine use, corrosion-resistant marine bolt and marine screws ensure lasting safety even in harsh saltwater environments.
Choose from following:
DRAIN PLUG - 51903106013 suitable for MAN D-engines
Drain Plug: Your Reliable Engine ComponentThe drain plug is the ideal product for use in MAN D engines. With the reference number 51903106013, this component ensures that your engines are efficient and remain functional over the long term. Rely on excellent fit and functionality.OEM Replacement Parts for Motorized ApplicationsAs an OEM replacement part, the drain plug offers the highest quality standards. Designed to be compatible with MAN D engines, this product secures the performance of your machines. Utilize our expertise in providing suitable components.
- 51903106010 suitable for MAN D-engines
Efficient OEM Spare Part for Various ApplicationsThe drain plug with sealing ring (comparison number: 51903106010) is an OEM spare part that efficiently solves your problem with draining liquids in engines. This product revitalizes your systems and ensures a complete seal – ideal for your requirements.Suitable for MAN D Engines Optimizes OperationThis drain plug sealing ring is suitable for MAN D engines and offers the quality you expect from OEM spare parts. Every detail is precisely designed to meet the needs of engines, ensuring reliable performance even under extreme conditions.
DRAIN PLUG - 51903106006 suitable for MAN D-engines
Reliable Drain Plug for ApplicationDiscover the drain plug, the essential component designed to fit MAN D engines, optimally crafted for your maintenance needs. With the comparison number 51903106006, we offer you a versatile OEM spare part that provides the highest precision. Weighing 0.08 kg, this product is easy to install and is a must for the smooth operation of your system.
SCREW PLUG - 51903105022 suitable for MAN D-engines
Discover the Screw Plug – Comparison Number 51903105022The screw plug with the comparison number 51903105022 is an essential replacement part for your machines. Designed to be suitable for MAN D engines, this product combines lightweight construction with enormous stability. Weighing only 0.08 kg, it offers optimal performance and functionality, ideal for various applications.
SCREW PLUG - 51903105021 suitable for MAN D-engines
High-Quality Screw Plug as an Essential ComponentDiscover our screw plug (comparison number: 51903105021), specifically designed to enhance the efficiency of your engines. This essential component is an OEM replacement part and belongs to the article group screws. Weighing only 0.15 kg, the screw plug is not only lightweight but also robust and durable.Excellent Screw Plug Suitable for MAN D EnginesOur screw plug is suitable for MAN D engines and provides the optimal solution for your requirements. As OEM replacement parts, they offer excellent workmanship and maximum reliability. At MOPA Motorparts, you benefit from replacement parts in original equipment manufacturer quality without having to compromise on the efficiency of your engines.
SCREW PLUG - 51903105020 suitable for MAN D-engines
Screw Plug: Comparison Number 51903105020Discover the top-quality screw plug with the comparison number 51903105020, optimally designed for use in engines. This product combines functionality and durability to ensure the performance of your machines. Weighing just 0.05 kg, it represents the ideal solution for engines required in specific applications such as shipping and stationary use.
SCREW PLUG - 51903105018 suitable for MAN D-engines
Robust Screw Plug for Your EnginesDiscover the performance strength of the screw plug with comparison number 51903105018, which provides a precise solution for your engine requirements. This product is suitable for MAN D engines and comes from the carefully selected group of "Screws." With its solid construction and high-quality materials, this screw plug ensures everything runs smoothly and reliably.
SCREW PLUG - 51903105006 suitable for MAN D-engines
Robust Screw Plug for Efficient Engine PerformanceExperience the premium screw plug with the comparison number 51903105006, an essential OEM spare part specifically designed to achieve optimal performance in engines. This product offers an excellent fit for mechanical applications.
SCREW PLUG - 51903105005 suitable for MAN D-engines
Suitable for MAN D: Screw Plug for EnginesOur screw plug with the reference number 51903105005 is ideal for anyone looking for replacement parts suitable for MAN D engines. This OEM replacement part offers excellent fit and contributes to the optimal functioning of your engine. With high-quality workmanship, this screw plug delivers the performance your engine needs.Lightweight and Practical in UseWeighing only 0.075 kg, the product from MOPA Motorparts impresses with its handy dimensions. The OEM replacement part is specifically designed for MAN D engines, making installation easier and supporting the efficiency and longevity of the engine. Benefit from a product that is optimally tailored to the demands of your application.
SCREW PLUG - 51903102001 suitable for MAN D-engines
Screw plug compatible with MAN D enginesDiscover our screw plug with the comparison number 51903102001. This precisely manufactured OEM replacement part supports the optimal function of your engine. This screw plug is compatible with engines that are suitable for MAN D and provides a reliable connection. Weighing only 0.09 kg, it is both lightweight and robust.Article from the group Screws: Quality for enginesThe screw plug belongs to the article group of screws and is specifically designed for the requirements in marine and stationary applications. Every OEM replacement part, including this screw plug, undergoes strict quality control to ensure you receive top-notch products.
SCREW PLUG - 51903100316 suitable for MAN D-engines
Innovative Product for MAN D EnginesDiscover the screw plug with the reference number 51903100316 – an OEM replacement part designed for MAN D engines. This screw belongs to the category of screws and offers reliable performance in various applications, particularly in marine and stationary engines.Quality from Family Ownership for EnginesAs a family-run company in its second generation, we offer you robust products. Our screw plug is suitable for MAN D engines and impresses with its durability and efficiency under special operating conditions. Trust in the expertise that comes from our long-standing experience.
SCREW PLUG - 51903100309 suitable for MAN D-engines
Optimal Solution with Screw PlugDiscover the screw plug with the comparison number 51903100309, which offers optimal performance. This OEM spare part fits perfectly to your requirements, especially suitable for your MAN D engines. Benefit from a product that has been specifically designed for the highest demands in marine and stationary applications.
SCREW PLUG - 51903100308 suitable for MAN D-engines
Excellent Screw Plug for MAN D EnginesDiscover our excellent product, the screw plug with the comparison number 51903100308. This component is specifically designed to optimally support your MAN D engines. Weighing only 0.027 kg, this screw plug not only ensures easy handling but also provides improved load-bearing capacity and reliability.
SCREW PLUG - 51903100290 suitable for MAN D-engines
Trust our OEM spare partDiscover our top-quality product: the screw plug with comparison number 51903100290. This OEM spare part provides a reliable connection in various applications in marine and stationary use.Tailored solution for MAN D enginesOur screw plug is suitable and compatible with MAN D engines, ensuring maximum efficiency. You receive optimized parts that are tailored to specific operational requirements.
SCREW PLUG - 51903100283 suitable for MAN D-engines
Quality of the Screw Plug with Comparison Number 51903100283Discover the screw plug with the comparison number 51903100283, which belongs to the product group "Screws" and meets the highest standards. This product is an essential component that combines performance and reliability.Suitable for MAN D Engines – Trust in Proven ProductsThis OEM replacement part is suitable for MAN D engines and ensures that your engines operate optimally. With our OEM replacement parts, you can be assured of supporting the lasting efficiency of your systems.
- 51903100280 suitable for MAN D-engines
High-Quality Spare Part for Fuel Filter Discover the drain plug for fuel filters, the OEM spare part with the comparison number 51903100280. This product allows for reliable draining of your fuel filter through an efficient design and is optimal for use in engine applications.
DRAIN PLUG - 51903100277 suitable for MAN D engines
High-Quality Drain Plug Suitable for MAN D EnginesDiscover the drain plug with the comparison number 51903100277! This product has established itself as an essential component in the world of engines. Our drain plug belongs to the category of screws and has been specifically designed to ensure a perfect fit for MAN D engines, particularly the D2862 series and the engine type D2862LE. When selecting replacement parts, quality is paramount, and this drain plug meets all requirements.
SCREW PLUG - 51903100276 suitable for MAN D-engines
Screw Plug: A Reliable ProductDiscover the screw plug with the comparison number 51903100276, compatible with MAN D engines. This OEM replacement part ensures a precise fit that meets your requirements. As part of our product category screws, this screw plug supports the functionality of your engines.
DRAIN PLUG - 51903100272 suitable for MAN D-engines
Discover the Drain Plug with Comparison Number 51903100272Discover the drain plug with the comparison number 51903100272, an important OEM spare part that has been specifically designed. This product falls under the category of screws and ensures reliable functionality for your engine.Optimal Quality: OEM Spare Parts for MAN D EnginesOur drain plug is precisely fitting for MAN D engines and ensures that your system runs smoothly. The quality-conscious manufacturing of the OEM spare parts offers a long lifespan and straightforward installation.
- 51903100271 suitable for MAN D-engines
Optimal Product: Fuel Drain PlugDiscover the fuel drain plug (comparison number: 51903100271), an important OEM replacement part designed for MAN D engines. Weighing only 0.028 kg and with compact dimensions of 3.2 cm in length and width, and 2.2 cm in height, this product impresses with functionality and precision. As OEM replacement parts, we offer quality and durability – ideal for the most demanding applications.Reliable Performance of MAN D EnginesThe fuel drain plug meets the highest standards for maintenance and performance monitoring. Particularly for engines designed for MAN D, it is essential that all components work together precisely to ensure optimal operation. This component is vital for enhancing the efficiency and reliability of your engines. Count on the performance of OEM replacement parts!
DRAIN PLUG - 51903100269 suitable for MAN D-engines
Robust Drain Plug for the Highest DemandsDiscover our special product, the drain plug with the comparison number 51903100269, suitable for MAN D engines. This reliable OEM spare part ensures that your engine is supported by precise and dependable function. Trust in Motorparts' years of experience with OEM spare parts to ensure the optimal performance of your systems.Quality Creates TrustExperience the advantages that our drain plug offers – it is an essential component suitable for MAN D engines. Each spare part is manufactured under high-quality standards, ensuring that your engines continue to operate at a top level.
SCREW PLUG - 51903100265 suitable for MAN D-engines
Premium Screw Plug for EnginesDiscover the screw plug with the comparison number 51903100265, an extremely reliable OEM spare part. This screw ensures a secure seal and stability for your engines. Weighing only 0.022 kg, it is compact and perfectly suited for both maritime and stationary use. The screw plug ensures that your engines operate reliably and is widely used in the industry for various applications.Suitable for MAN D EnginesOur screw plug is suitable for MAN D engines and meets the highest quality standards as an OEM spare part. This screw impresses with its robustness and special suitability for diesel and gas engines. Rely on the comparison number 51903100265 to optimally support your machinery.
SCREW PLUG - 51903100263 suitable for MAN D-engines
Efficient Screw Plug for High-Performance ApplicationsThe screw plug with the comparison number 51903100263 is an essential product in the field of engine technology. As an important element from the group of "Screws," this suitable OEM replacement part impresses with excellent workmanship and durability. Weighing only 0.13 kg, the screw plug proves to be an ideal component for demanding applications.Suitable for MAN D EnginesThis product is a suitable replacement part for MAN D engines and contributes to the functionality and efficiency of your engine. We only offer OEM replacement parts that meet the high standards of your engines and thus optimally support their performance.
- 51903100261 suitable for MAN D-engines
Robust Drain Plug for Fuel Filter – Comparison Number 51903100261 The drain plug for the fuel filter with the comparison number 51903100261 is an essential useful product for engine maintenance. This OEM replacement part ensures optimal fuel drainage, which increases efficiency.The Perfect Replacement Part Suitable for MAN D Engines This exhaust system replacement part is suitable for MAN D engines and offers a long service life through reliable materials. The comparison number 51903100261 helps optimize your engine's performance and facilitates maintenance.
What are bolts and screws used for in engine systems?
A bolt and screw is used to fasten components under mechanical stress. This includes cylinder heads, pumps, intake manifolds, mounts, and brackets. Engine bolt assemblies require high tensile strength and precise thread profiles to prevent loosening under load. In marine settings, bolts marine configurations include additional corrosion protection through zinc coatings, stainless alloys, or composite heads. Whether for permanent fastening or removable joints, motor screws and bolts form the basis of structural integrity in all engine types.
Function and benefits of bolts and screws in engines
- Secure static and dynamic connections across engine assemblies
- Resist vibration, pressure, and thermal expansion
- Support torque retention and load distribution
- Enable safe disassembly for maintenance and inspection
- Allow modular engine construction with standard sizes
In both land-based and marine power units, engine screws and motor bolt types are selected for load class, material strength, and thread pitch. Using the right bolt and screw combination reduces failure risks and simplifies service procedures.
Types and materials of marine and engine fasteners
- Hex head and flange bolts for structural engine joints
- Socket head motor screws for precision components
- Thread-locking marine screws for hull or motor mounts
- High-strength engine bolt sets with graded coatings
- Marine bolt systems with stainless steel or brass
Bolts marine assemblies often use A4 stainless or Duplex steel, ensuring protection against seawater and galvanic reactions. Motor screws in enclosed spaces may use black oxide or phosphate finishes for corrosion protection and ease of removal. Material selection depends on torque level, accessibility, and contact with fluids or chemicals.
Compatibility and sourcing
We offer fastening solutions suitable for MTU, Deutz, MAN, Volvo Penta, and MWM. Whether you're rebuilding a turbo mount, re-securing an exhaust manifold, or replacing critical head bolts, our bolt and screw range fits a wide variety of marine and industrial engines. We stock bolts by dimension, thread, material, and application group.
Thanks to our well-equipped warehouse and fast delivery options, we offer short lead times and quick availability for both standard and application-specific fasteners.
Use cases in industrial and marine applications
Marine screws are often used for water-cooled exhaust, hull penetrations, and engine bed mounting. Motor bolt sets are required for rotating assemblies and timing covers. Across applications, the right engine bolt and screw setup ensures alignment under thermal expansion and torque loading. For boats, hose adapter brackets, alternators, and gearboxes also require vibration-resistant marine bolt systems with low galling and secure locking.
Buying advantages with us
Our B2B shop provides:
- Fast worldwide shipping via DHL Express
- Material and strength class selection support
- Easy ordering for bulk or precision fasteners
We supply OEM-standard bolt and screw combinations for maintenance, repairs, or assembly upgrades. With practical kit options and single part selection, technicians can easily match specs during overhauls or engine conversions.
Related components to bolt and screw systems
Complementary items often include washers, retaining rings, thread-locking pastes, brackets, and custom spacers. These elements contribute to torque stability and fastener longevity in both mobile and stationary engines. A correct bolt and screw setup is fundamental to safe operation.
Frequently asked questions about bolts and screws
What is a screw?
A screw is a threaded fastener designed to be inserted into material or a pre-threaded hole to hold components together.
What is the difference between a bolt and a screw?
A bolt typically works with a nut and is used through unthreaded holes, while a screw forms its own thread or fits into a tapped hole.