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:
HEXAGON BOLT - 81904900457 suitable for MAN D engines
Reliable Hexagon Bolt for MAN D EnginesOur hexagon bolt with the comparison number 81904900457 is the ideal OEM replacement part for your applications in engines. This screw impresses with its precise manufacturing and ensures a secure connection.
HEXAGON BOLT - 81904900437 suitable for MAN D engines
Precise Hexagon Bolt for Compatible MAN D Engines Experience the outstanding quality of the hexagon bolt, perfectly suited to optimize the performance of your engines. This durable product offers a reliable solution for your needs and contributes to the longevity of the systems. The comparison number 81904900437 stands for the highest precision, maximum comfort, and efficiency in your operations.Efficient Design: Comparison Number 81904900437 This hexagon bolt, weighing only 0.015 kg, has been developed as an OEM replacement part. It is compatible with MAN D engines and meets the highest quality standards. With the comparison number 81904900437, you can be assured that this product precisely matches the specifications of your engine.
CYLINDER SCREW - 81904900430 suitable for MAN D engines
Cylinder screw suitable for MAN D enginesDiscover the cylinder screw with the comparison number 81904900430 – an essential product specifically designed for MAN D engines. This cylinder screw impresses with its precise workmanship and ensures that your engines operate efficiently and reliably. Weighing only 0.004 kg, it is the ideal choice for applications in marine and stationary use as well as for locomotives.OEM replacement parts for reliable performanceThe cylinder screw with the comparison number 81904900430 is one of our OEM replacement parts, manufactured to the highest quality standards. Unlike aftermarket solutions, our parts offer optimal fit and reliability. Trust in the quality that products from the Equipment Manufacturer can provide.
KNURLED SCREW - 81904900427 suitable for MAN D engines
Precise Knurled Screw for Efficient EnginesDiscover the knurled screw with the comparison number 81904900427, designed for the highest demands on engines. This product is suitable for MAN D engines and belongs to the category of screws. Weighing only 0.012 kg, the knurled screw offers an excellent solution for optimizing engine performance.OEM Replacement Parts for Best QualityOur knurled screw is offered as an OEM replacement part, meaning it fully complies with the manufacturer's specifications. By using an OEM replacement part, you benefit from the quality that is essential for the functionality of your engines. This ensures a perfect fit and longevity.
SCREW/BOLT - 81904900413 suitable for MAN D engines
Premium Screw – Comparison Number 81904900413 Discover our premium screw, marked with the comparison number 81904900413 and specifically designed as an OEM replacement part. This screw is ideal for durable applications in your engine technology. It weighs only 0.01 kg and has the optimal shape to maximize engine performance and efficiency.Suitable for MAN D Engines and Other Manufacturers Our screw is particularly suitable for engines designed for MAN D. These carefully tested and high-quality OEM replacement parts are available to enhance the reliability of your machines. Trust our expertise when it comes to replacement parts suitable for MWM, Mercedes-Benz, Deutz, Volvo, MTU, Bosch, and Detroit Diesel.
HEXAGON BOLT - 81904900406 suitable for MAN D engines
Hexagon bolt with comparison number 81904900406Experience the hexagon bolt with comparison number 81904900406, specifically designed to ensure valuable engine performance. This OEM replacement part is suitable for MAN D engines and offers you a reliable solution for your application. Weighing only 0.04 kg, the bolt is made from premium materials to meet the most demanding requirements.Global availability for your enginesWhether in marine or stationary use, the hexagon bolt ensures optimal fastening and is an essential component suitable for MAN D engines. Rely on our OEM replacement parts that provide the quality you need to maintain the operation of your machines.
SCREW/BOLT - 81904900400 suitable for MAN D engines
Precision in Every Detail: Comparison Number 81904900400Discover our product, the screw with the comparison number 81904900400, which is specifically designed for reliable application in engines. This OEM spare part provides you with the highest precision, which is crucial for the performance and longevity of your systems. Our screw is an essential component that is carefully manufactured according to strict industrial standards.
HEXAGON BOLT - 81904900395 suitable for MAN D engines
Excellent Product Suitable for MAN D EnginesDiscover the hexagon bolt with the comparative number 81904900395 – an excellent OEM replacement part designed to function reliably in your engines. This bolt weighs only 0.09 kg, making it particularly handy. Its design ensures a long service life under the demanding conditions prevalent in marine and stationary engineering.Robust Component Suitable for MAN D EnginesThe hexagon bolt is a powerful product designed for MAN D engines. As part of our comprehensive range of over 1 million replacement parts, we ensure that you have the necessary components on hand to keep your machines optimally operational. Rely on the quality of the OEM replacement parts that are specifically tested and approved.
HEX SHOULDER STUD - 81904900394 suitable for MAN D engines
Hex shoulder stud for your specific requirementsDiscover the hex shoulder stud with the comparison number 81904900394 – an essential product designed to optimize the performance of your engines. This OEM replacement part impresses with quality and precision. Weighing only 0.01 kg, it offers a lightweight yet robust solution for a variety of applications.
SCREW/BOLT - 81904900328 suitable for MAN D engines
Precise Product for MAN D EnginesThe screw/bolt with the comparison number 81904900328 is an essential product designed for MAN D engines. This OEM replacement part belongs to the category of screws and is characterized by high quality. With a weight of only 0.008 kg, it offers an effective solution for your requirements in the field of engines.Quality Through Internal ControlsEach screw/bolt with the comparison number 81904900328 is manufactured under strict internal controls to achieve the best results in terms of precision and reliability. As an OEM replacement part, this product is ideal for diesel and gas engines used in marine applications as well as in locomotives.
ROUND-HEAD SCREW - 81904900323 suitable for MAN D engines
Round-head screw with comparison number 81904900323Discover the round-head screw with comparison number 81904900323, an important product that provides a top-notch solution for your engine needs. This round-head screw is characterized by its high quality and reliability and is suitable for MAN D engines. Weighing only 0.03 kg, this OEM replacement part is easy to handle and install.Suitable for MAN D – Optimal choice for your enginesThis round-head screw is suitable for MAN D engines and offers a powerful and reliable solution for your machines. The product meets the highest standards and ensures that you receive a safe component. You can trust that with this round-head screw, you will have excellent durability and stability.
HEXAGON BOLT - 81904900319 suitable for MAN D engines
Hexagon bolt with comparison number 81904900319Discover the hexagon bolt with comparison number 81904900319, an essential OEM spare part that meets the requirements of MAN D engines. This product optimizes the performance and safety of your machines. Weighing only 0.05 kg, the hexagon bolt is ideal for demanding applications.
SCREW PLUG - 81904900307 suitable for MAN D engines
High-Performance Screw Plug with Comparison Number 81904900307Discover the impressive screw plug with comparison number 81904900307. This OEM spare part stands for quality and durability and is specifically designed to ensure a perfect fit. Weighing only 0.013 kg, this product is ideal for applications that demand the highest levels of reliability.
SCREW PLUG - 81904900306 suitable for MAN D engines
Precise Screw Plug for Your EnginesDiscover the precise screw plug, designed for the highest demands in engine technology with the comparison number 81904900306. This OEM spare part is an essential component suitable for MAN D engines. Weighing only 0.02 kg, the screw plug combines lightness and robustness for reliable performance.
HEX SHOULDER STUD - 81904900264 suitable for MAN D engines
Hex shoulder stud with comparison number 81904900264Discover the hex shoulder stud with the comparison number 81904900264, which offers you an optimal solution for various applications. This product is a top-quality OEM replacement part that has been specially manufactured to meet the demands of engines. Weighing only 0.001 kg, this component is lightweight yet extremely robust, allowing it to handle long-term use with ease.Suitable for MAN D enginesThe hex shoulder stud is suitable for MAN D engines and provides you with reliability and functionality. As an OEM replacement part, it meets the strict standards required for diesel and gas engines in marine and stationary applications. You are investing in quality that can compete with original equipment manufacturer products.
HEX SHOULDER STUD - 81904900263 suitable for MAN D engines
Premium Hex shoulder stud with comparison number 81904900263Discover the hex shoulder stud with comparison number 81904900263, an indispensable OEM spare part specifically designed to meet expectations for performance and reliability. This product is suitable for MAN D engines and provides a top-notch solution for your spare part needs in marine and stationary applications. Weighing only 0.1 kg, this screw is both lightweight and stable, making it ideal for demanding environments.Reliable quality and performanceThe hex shoulder stud, identified by comparison number 81904900263, not only offers a secure connection but also reflects our commitment to top-quality OEM spare parts. Our products are compatible and essential for reliable engine performance.
HEXAGON BOLT - 81904900255 suitable for MAN D engines
Hexagon Bolt, Comparison Number 81904900255Discover the Hexagon bolt, comparison number 81904900255, which offers a precise solution for your engines. This product is suitable for MAN D engines and impresses with its quality and reliability. Weighing only 0.003 kg, the Hexagon bolt is lightweight and perfectly suited for use in marine and stationary engine technology.OEM Replacement Parts for Your NeedsOur Hexagon bolt is a proven OEM replacement part and belongs to the group of screws. With the comparison number 81904900255, we ensure that you receive a product that is ideally matched to the requirements of your MAN D engines. Rely on reliable OEM replacement parts to promote the longevity of your drive.
STUD - 81904900252 suitable for MAN D engines
Precise Stud for Use in Marine ApplicationsDiscover the stud with comparison number 81904900252, a reliable product specifically designed for the demands of engines. This stud belongs to the category of screws and provides you with the assurance you need to optimize the performance of your machines. By using OEM replacement parts, excellent fit is ensured, which is crucial for the efficiency of your engines.Application: Suitable for MAN D EnginesThis stud is suitable for MAN D engines and simplifies the maintenance and repair of your applications. Weighing only 0.001 kg, the stud remains both lightweight and versatile. Our OEM replacement parts are optimally tailored to the functional requirements of engines, ensuring a long service life.
HEX SHOULDER STUD - 81904900245 suitable for MAN D engines
Hex Shoulder Stud – Your Reliable ComponentThe hex shoulder stud with the comparison number 81904900245 is an essential product that is crucial for the reliable functioning of your engines. This OEM replacement part has been specifically designed to meet your requirements, offering excellent fit. Weighing only 0.035 kg, the screw is lightweight yet robust.
ADJUSTING SCREW - 81904900235 suitable for MAN D engines
Reliable Adjusting Screw for Various EnginesDiscover the reliable adjusting screw with the reference number 81904900235, specifically designed for engines that meet the highest performance requirements. This OEM replacement part ensures that your engine operates optimally. Weighing just 0.005 kg, the adjusting screw is designed for precise installation and supports the functionality of your MAN D engines.Suitable for MAN D EnginesThe adjusting screw is developed to be suitable for MAN D engines, giving you the confidence that you are acquiring a part that meets the high demands of an OEM replacement part. In the category of screws, this screw provides your engine with the stability and performance you need to operate successfully in demanding environments.
CYLINDER LOCK SCREW - 81904900227 suitable for MAN D engines
Robust Cylinder Lock Screw for Reliable EnginesDiscover the cylinder lock screw with the comparison number 81904900227, an essential OEM spare part specifically designed for MAN D engines. As part of our product category Screws, this item provides the necessary security and stability for your engines. Weighing only 0.06 kg, the cylinder lock screw is the optimal solution for marine and stationary applications.Quality Product Suitable for MAN D EnginesThis useful OEM spare part is ideally suited to support the functionality of your engines. The cylinder lock screw is an important component compatible with MAN D, significantly enhancing the performance and lifespan of your engines. Rely on the unparalleled quality of our products, designed to meet the specific demands of the industry.
MOUNTING BOLT - 81904900220 suitable for MAN D engines
Quality and Stability: View Securing Screw Discover the robust securing screw with the comparison number 81904900220, designed as an OEM replacement part. This securing screw is an essential component in the operation of engines, providing stability and reliability. It weighs only 0.007 kg, making it easy to handle.
HEXAGON BOLT - 81904900218 suitable for MAN D engines
Reliable Hexagon Bolt for Your ApplicationsDiscover the hexagon bolt with the comparison number 81904900218, specifically designed to meet the highest requirements. This product belongs to the group of screws and is ideally suited for engines used in demanding applications. With its precise manufacturing, the hexagon bolt ensures durability and reliability of your machines.
ADJUSTING SCREW - 81904900209 suitable for MAN D engines
Excellent Adjusting Screw – Comparison Number 81904900209Discover the Adjusting Screw with the comparison number 81904900209, which has been specifically developed as an OEM spare part. This component is not only an important part of MAN D engines, but it also provides you with the assurance of utilizing the best manufacturer standards. This quality ensures that your engines operate efficiently in various applications.Suitable for MAN D Engines – Reliable QualityThis Adjusting Screw is suitable for MAN D engines and belongs to the article group of Screws. Weighing only 0.01 kg, this OEM spare part is easy to handle and integrates smoothly into your existing systems. Our OEM spare parts offer reliable fitment compared to aftermarket products, ensuring optimal functionality.
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.