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:
CYLINDER SCREW - 81900300142 suitable for MAN D engines
Cylinder screw with comparison number 81900300142Discover the cylinder screw with comparison number 81900300142 – an essential product for your engine technology. This OEM spare part offers the precision and reliability required for use in demanding environments. Weighing only 0.005 kg, the cylinder screw is not only lightweight but also ideal for installation on engines.
CYLINDER LOCK SCREW - 81900300138 suitable for MAN D engines
Cylinder lock screw: Precision quality for your requirementsThe cylinder lock screw with the comparison number 81900300138 is an essential OEM spare part that ensures the optimal function of your engines. With this product, you can ensure that your systems operate reliably. The cylinder lock screw weighs only 0.027 kg, making it easy to handle.Suitable for MAN D engines with the highest precisionThis top-quality spare part is suitable for MAN D engines and ensures a perfect fit. Unlike aftermarket parts, our OEM spare parts provide assurance of quality directly from the equipment manufacturer. This minimizes downtime and maximizes the performance of your machines.
CYLINDER LOCK SCREW - 81900300136 suitable for MAN D engines
Cylinder Lock Screw for Reliable EnginesDiscover the cylinder lock screw with the comparison number 81900300136 – an important OEM spare part that is essential for the performance of your engines. This precisely manufactured product belongs to the category of screws and plays a central role in the reliability and efficiency of your machines.Suitable for MAN D Engines: Optimal SolutionOur cylinder lock screw is perfectly suited for MAN D engines and ensures an optimal connection of the individual components. Weighing 0.21 kg, this cylinder lock screw can be quickly and easily installed, allowing you to get your engines ready for use in no time.
CYLINDER LOCK SCREW - 81900300135 suitable for MAN D engines
Your Solution for Reliable EnginesThe Cylinder lock screw with the reference number 81900300135 is an essential OEM spare part designed specifically to optimize the performance of engines. This product is suitable for MAN D engines and provides a secure connection in the demanding applications of marine and stationary environments.Precision and Quality in Every DetailThe cylinder lock screw is an OEM spare part that offers the highest precision and reliability. Weighing only 0.18 kg, it combines the characteristics of a robust and durable component. The reference number 81900300135 not only ensures the quality of the product but also the compatibility for MAN D engines that you can trust.
CYLINDER LOCK SCREW - 81900300134 suitable for MAN D engines
Robust Cylinder Lock Screw for Marine UseDiscover the cylinder lock screw with comparison number 81900300134, designed specifically for high demands. This top-quality product is suitable for MAN D engines and provides you with the reliability you need for operating your marine and stationary engines. Our cylinder lock screw belongs to the category "Screws" and ensures that everything works together optimally.Precision and Quality as an OEM Replacement PartWeighing only 0.16 kg, this OEM replacement part combines the perfect balance of lightness and robustness. The comparison number 81900300134 ensures compatibility with MAN D engines, and as an OEM replacement part, we offer you the highest quality and durability. Rely on our expertise in supplying OEM replacement parts that meet the industry's demands.
CYLINDER SCREW - 81900300128 suitable for MAN D engines
Cylinder screw suitable for MAN D enginesDiscover the cylinder screw with the comparison number 81900300128, an OEM replacement part specifically designed for use in engines. This product stands out due to its excellent quality and precision. Weighing only 0.01 kg, this cylinder screw is easy to handle and ensures optimal performance in demanding applications.Suitable for MAN D engines – Your solution in the industryThis cylinder screw is perfectly suited for MAN D engines and helps keep your machines operating efficiently. As an essential component for your engines, the OEM replacement part is a reliable choice to ensure smooth operation. Rely on our over 25 years of experience in providing high-quality replacement parts.
CYLINDER SCREW - 81900300126 suitable for MAN D engines
Cylinder screw suitable for MAN D enginesThe cylinder screw with the comparison number 81900300126 is an essential product that meets the requirements for quality and reliability. This OEM spare part features precise manufacturing and ensures excellent functionality in your engine. Weighing only 0.01 kg, this cylinder screw is light yet stable enough to be used in demanding applications.
CYLINDER SCREW - 81900300122 suitable for MAN D engines
Cylinder Screw for Efficient EnginesDiscover our product Cylinder Screw, suitable for MAN D engines with the comparison number 81900300122. This Cylinder Screw is an essential OEM replacement part and belongs to the category of Screws. Weighing only 0.03 kg, it meets the highest standards for engines in demanding environments.
CYLINDER SCREW - 81900300121 suitable for MAN D engines
Precision Cylinder Screw for Efficient EnginesDiscover our cylinder screw with the reference number 81900300121 – a crucial product that ensures efficient and long-lasting performance. This cylinder screw is suitable for MAN D engines and belongs to the category of screws. Weighing only 0.01 kg, it combines lightness with robust functionality.
CYLINDER LOCK SCREW - 81900300115 suitable for MAN D engines
Precision of the Cylinder Lock ScrewOur cylinder lock screw with the comparison number 81900300115 is essential for the reliable operation of your engines. This carefully manufactured OEM replacement part is specifically designed to meet the demanding requirements of engines. Weighing only 0.005 kg, this product offers the perfect combination of robustness and lightness.Fit: Item suitable for MAN D enginesThis valuable OEM replacement part is suitable for MAN D engines and therefore offers exact fit. Unlike aftermarket products, which often do not meet the same quality standards, you can rely on consistently high performance and longevity with our OEM replacement parts. The careful manufacturing process ensures that each component is perfectly tailored to the application.
CYLINDER SCREW - 81900300113 suitable for MAN D engines
Cylinder screw suitable for MAN D enginesDiscover our cylinder screw with the comparison number 81900300113, specifically designed for engines used in MAN D applications. This essential component impresses with its precise workmanship and is ideal for customers who expect the highest quality standards.Reliable OEM replacement partsThe cylinder screw is an OEM replacement part, providing high reliability and performance. Compared to aftermarket products, our OEM replacement parts offer the safety and durability required for the functionality of your MAN D engines. Rely on quality from recognized manufacturers to ensure operational capability.
CYLINDER SCREW - 81900300109 suitable for MAN D engines
Cylinder screw for your engineDiscover our cylinder screw, comparison number 81900300109, which is perfectly suitable for various applications in engines. This premium OEM spare part ensures a stable connection within your engine system, particularly fitting for MAN D engines.
PAN-HEAD SCREW - 81900300106 suitable for MAN D engines
Premium Pan-head Screw with Comparison Number 81900300106Discover our pan-head screw with the comparison number 81900300106, specially designed for your needs in marine and stationary applications. This pan-head screw offers outstanding precision and meets the highest quality standards. Weighing only 0.009 kg, this product is not only functional but also very convenient.
PAN-HEAD SCREW - 1123429103 suitable for Bosch engines
Precise Pan-head Screw with Comparison Number 1123429103Discover the pan-head screw listed under comparison number 1123429103. This OEM spare part offers you the highest quality and durability to operate your engines reliably. Weighing only 0.009 kg and featuring a thoughtful design, this screw meets the requirements of demanding operating conditions.
PAN-HEAD SCREW - 1123410206 suitable for Bosch engines
Pan-head Screw 1123410206 – Your Solution for EnginesDiscover the pan-head screw with the comparison number 1123410206, which is ideally suited for your requirements in marine and stationary applications. This OEM replacement part offers a perfect fit and reliability that are essential for engine performance. Weighing only 0.009 kg, the pan-head screw is lightweight yet durable.Replacement Parts for MAN D Engines in FocusThis pan-head screw is compatible with MAN D engines and provides you with the assurance that only OEM replacement parts can offer. Our products are primarily designed to meet the demands of critical applications. Use the comparison number 1123410206 to ensure you select the right product.
PAN-HEAD SCREW - 81900300105 suitable for MAN D engines
Robust Pan-head screw for your applicationsDiscover the pan-head screw with the comparison number 81900300105, which is perfectly suitable for the MAN D engines. This spare part is essential for your applications in marine and stationary areas as well as for locomotives. Weighing just 0.016 kg, this pan-head screw allows for easy installation and contributes to the efficiency of your engines.Suitable for MAN D engines — Quality that convincesOur pan-head screw is suitable for MAN D engines and meets all expectations for durability and precision. At MOPA Motorparts, we rely exclusively on spare parts to achieve the highest standards. This product is indispensable for the smooth operation of your systems.
CYLINDER LOCK SCREW - 81900300098 suitable for MAN D engines
Cylinder Lock Screw for Reliable EnginesThe cylinder lock screw with the reference number 81900300098 is an essential product for the reliable performance of your engines. This OEM replacement part offers the highest precision and quality. It is specifically designed to set a high standard as a cylinder lock screw in various applications.Perfect Engineering Suitable for MAN D EnginesThis replacement part is suitable for MAN D engines and thus provides an ideal solution for professional businesses that prioritize quality. By using the best materials, the cylinder lock screw can also meet the toughest demands. Rely on our expertise when selecting your OEM replacement parts.
CYLINDER SCREW - 81900300095 suitable for MAN D engines
Optimal Cylinder Screw for Your NeedsDiscover the cylinder screw you need! With the comparison number 81900300095, this product is suitable for MAN D engines. It is an essential spare part for the efficient maintenance of your engines, especially in maritime and stationary applications. Weighing only 0.04 kg, this cylinder screw offers the ideal combination of lightness and robustness.Reliability from the Manufacturer MAN DOur cylinder screw is an OEM spare part that meets the highest quality standards. This product is particularly suited to your requirements and ensures sustainable performance for your engine. Trust in the durability and precision that this cylinder screw provides to ensure smooth operation.
PAN-HEAD SCREW - 81900300089 suitable for MAN D engines
Pan-head screw for various engine applicationsDiscover the pan-head screw with the comparison number 81900300089, an essential spare part designed to optimize engine performance. This product is suitable for MAN D engines and impresses with a precise fit and high-quality materials. Weighing only 0.02 kg, the screw is small but powerful, ideal for different applications in marine and stationary technology.Precision and reliability in applicationUsing spare parts ensures that the pan-head screw meets strict requirements and standards. Suitable for MAN D engines, this component facilitates smooth integration into your engines and ensures long-term functionality. Designed for the highest demands, this product is the perfect choice for those who value precision and quality.
PAN-HEAD SCREW - 1123429125 suitable for Bosch engines
Pan-head screw suitable for MAN D enginesDiscover our pan-head screw with the reference number 1123429125, specifically designed for use in MAN D engines. Weighing only 0.02 kg, this product offers top performance and reliability in demanding environments.OEM replacement parts for enginesOur screw is an OEM replacement part that provides an optimal fit, making your engines efficient. The high quality of the product, suitable for MAN D, ensures durability and contributes to the efficiency of your drive.
CYLINDER LOCK SCREW - 81900300086 suitable for MAN D engines
Cylinder lock screw suitable for MAN D enginesDiscover our cylinder lock screw, which is known by the comparison number 81900300086. This product is suitable for MAN D engines and ensures reliable fastening. Weighing only 0.016 kg, this screw offers an optimal balance between load-bearing capacity and handling. It meets high quality standards and is therefore an essential OEM spare part.OEM spare parts for maximum performanceAs an OEM spare part, our cylinder lock screw represents excellent craftsmanship and long-term functionality. Compared to alternative aftermarket solutions, our product provides a quality specifically designed for engines. Our comparison number 81900300086 ensures that you receive a suitable spare part that has been precisely developed for MAN D engines.
CYLINDER SCREW - 81900300085 suitable for MAN D engines
Robust Cylinder Screw for EnginesDiscover the cylinder screw with the comparison number 81900300085 – an OEM replacement part designed optimally for your engine requirements. This cylinder screw belongs to the article group of screws and weighs only 0.001 kg, making it lightweight yet sturdy.Efficiency for MAN D EnginesOur cylinder screw is compatible with MAN D engines and impresses with its outstanding quality. As an OEM replacement part, it ensures that your engines continue to operate reliably. Trust in products that meet the high standards you expect.
DOWEL PASS SCREW - 81900300065 suitable for MAN D engines
Dowel Pass Screw for Reliable EnginesDiscover the premium dowel pass screw with the comparison number 81900300065. This product plays a vital role in the performance and longevity of your engines. Weighing only 0.019 kg, it is ideally suited for a variety of applications, especially in marine and stationary areas.Suitable for MAN D Engines – Your Choice for QualityThis dowel pass screw is specifically suitable for MAN D engines. As an OEM spare part, it meets the highest standards in engine technology. Rely on our extensive range of OEM spare parts for various brands, including MWM, Mercedes-Benz, Deutz, and others.
CYLINDER SCREW - 81900300064 suitable for MAN D engines
Cylinder Screw: Precise Solution for Your Engine NeedsThe cylinder screw with the comparison number 81900300064 is an essential accessory for the effective operation of your engines. This product impresses with its durability and reliability. Weighing only 0.07 kg, the screw is easy to handle and ideally suited for numerous applications in marine and stationary settings.OEM Replacement Part for Your RequirementsOur product is an OEM replacement part designed specifically for MAN D engines. This ensures that the cylinder screw meets expectations in terms of functionality and compatibility.
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.