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:
HEX COLLAR BOLT - 81904900585 suitable for MAN D engines
Hex collar bolt: Your Reliable Spare PartDiscover the Hex collar bolt with the comparison number 81904900585, an essential OEM spare part, specifically designed for effective use in MAN D engines. This bolt ensures that your engines operate optimally with high-quality components.
CYLINDER LOCK SCREW - 81904900579 suitable for MAN D engines
Ultimate Cylinder Lock Screw for Your EnginesDiscover our product, the Cylinder Lock Screw with the comparison number 81904900579 – an essential OEM replacement part that ensures the smooth operation of your MAN D engines. This replacement part is designed to hold securely and precisely, significantly contributing to the performance of your engine.Perfect Solution for Engine SecurityThe Cylinder Lock Screw is suitable for MAN D engines and belongs to the group of Screws. Weighing only 0.004 kg, it offers optimal functionality and reliability in various applications, particularly in marine and stationary use. Trust in our OEM replacement parts that undergo strict quality controls.
CYLINDER LOCK SCREW - 81904900578 suitable for MAN D engines
Cylinder lock screw - Comparison number 81904900578Discover our cylinder lock screw, comparison number 81904900578, which has been specifically designed for use in engines. This precisely manufactured product ensures a reliable attachment of the cylinders, thereby increasing the efficiency of your machines. Weighing only 0.006 kg, our replacement part impresses with its ease of handling.Suitable for MAN D engines and OEM replacement partsOur cylinder lock screw is suitable for MAN D engines and thus represents an essential component in your engine infrastructure. We only offer OEM replacement parts that meet the highest quality standards. Trust in the durability and performance of our products, which are precisely tailored to the requirements of MAN D engines.
ROUND-HEAD SCREW - 81904900574 suitable for MAN D engines
Round-head Screw: An Indispensable ProductDiscover the round-head screw with comparison number 81904900574 – an indispensable OEM spare part, suitable for MAN D engines. This screw belongs to the category of screws and ensures maximum reliability thanks to its precise fit. Optimally designed products play a crucial role, especially in marine and stationary applications.
ADJUSTING SCREW - 81904900566 suitable for MAN D engines
Precise Adjusting Screw for High-Performance EnginesDiscover the adjusting screw with the comparison number 81904900566, a precise OEM replacement part that ensures optimal operation of engines. This screw is suitable for MAN D engines and offers reliable performance in your applications, whether in the maritime sector or stationary use.Quality Products for the Highest StandardsThe adjusting screw 81904900566 belongs to the article group of screws and provides an excellent solution for your engine requirements. With our OEM replacement parts, you are on the safe side, as we prioritize durability and resilience. The product weighs only 0.09 kg, which allows for easy installation.
CYLINDER LOCK SCREW - 81904900565 suitable for MAN D engines
Reliable Cylinder Lock ScrewDiscover the cylinder lock screw with the comparison number 81904900565 – a valuable OEM spare part that offers you the highest safety in engine applications. This cylinder lock screw is suitable for MAN D engines and plays a crucial role in the stability and functionality of your machines. Weighing only 0.01 kg, this product is an essential element for any technical operation.OEM vs. Aftermarket: Quality MattersUnlike aftermarket solutions that often vary in quality, our OEM spare parts, such as the cylinder lock screw with the comparison number 81904900565, provide exact fit and robustness. Only in this way can you ensure that your equipment operates optimally and is not exposed to unexpected failures. Rely on our extensive experience and high standards for OEM spare parts.
CYLINDER LOCK SCREW - 81904900564 suitable for MAN D engines
OEM Spare Part for MAN D EnginesDiscover the cylinder lock screw with the comparison number 81904900564, an essential OEM spare part that is optimal for the functionality of your engine. This screw weighs only 0.006 kg and offers the perfect solution for many industrial applications.Reliable Performance through Top Quality The cylinder lock screw is suitable for MAN D engines and meets the highest quality standards. As part of our product group "Screws," this product offers reliability and durability. Count on our OEM spare parts to optimize the operational capability of your engines.
CYLINDER SCREW - 81904900562 suitable for MAN D engines
Precise Cylinder Screw Compatible with MAN D EnginesDiscover the cylinder screw with the comparison number 81904900562, a product that is specially suited for applications in the marine and stationary sectors. This OEM spare part ensures a perfect fit and maximum reliability. Protect your investment in technology with a component that meets the requirements of MAN D engines.
HEXAGON BOLT - 81904900555 suitable for MAN D engines
Efficient Hexagon Bolt with Comparison Number 81904900555Discover the Hexagon bolt with the comparison number 81904900555, an essential screw that ensures a secure connection in engines. This product is suitable for MAN D engines and offers the reliable quality that you expect. With this Hexagon bolt, you optimize the performance of your engines and promote their longevity.Lightweight yet StrongWeighing only 0.001 kg, the Hexagon bolt combines lightness with powerful stability. The comparison number 81904900555 stands for dependable quality that is crucial in demanding maritime and stationary applications. This screw is an essential component for the operation of your engines.
ROUND-HEAD SCREW - 81904900554 suitable for MAN D engines
Round-head screw suitable for MAN D enginesDiscover the round-head screw with the comparison number 81904900554, which is considered an essential product in the category of screws. This round-head screw is suitable for MAN D engines and has been specifically designed to ensure reliable performance under demanding conditions. Weighing only 0.01 kg, it is ideal for use in marine and stationary technology as well as in locomotives.Quality of OEM spare partsAs an OEM spare part, this round-head screw meets the highest industry standards. It ensures that your engines operate steadily and efficiently. The use of suitable materials promotes a long lifespan and excellent compatibility with existing systems.
CYLINDER SCREW - 81904900553 suitable for MAN D engines
Cylinder screw compatible with MAN D enginesDiscover our cylinder screw with the comparison number 81904900553, optimally tailored to the requirements of MAN D engines. This OEM spare part ensures an exact fit, which is crucial for the safety and efficiency of your engine. Weighing only 0.01 kg, the screw is not only lightweight but also offers exceptional stability.Quality of OEM spare partsThe cylinder screw is an indispensable product specifically developed as a fitting component for MAN D engines. Our long-established family business in its second generation places great emphasis on the quality of our OEM spare parts. We carry items for renowned manufacturers such as MWM, Mercedes-Benz, Deutz, MAN, Volvo, MTU, Bosch, and Detroit Diesel, ensuring the highest standards.
PAN-HEAD SCREW - 81904900550 suitable for MAN D engines
Pan-head screw for MAN D enginesDiscover our outstanding product, the pan-head screw with the comparative number 81904900550, suitable for MAN D engines. This OEM replacement part offers not only a precise fit but also the reliability you desire for your engines. Weighing just 0.003 kg, this component combines lightness and robustness, ideal for demanding operating conditions.
HEXAGON BOLT - 81904900543 suitable for MAN D engines
Precise Hexagon Bolt: Comparison Number 81904900543 Discover the hexagon bolt with the comparison number 81904900543 – an essential OEM replacement part for engines. This excellently crafted hexagon bolt is part of our selection of screws and impresses with the highest quality that you can expect from OEM replacement parts. Weighing only 0.007 kg, this product stands out for its robustness and durability.Efficiency for MAN D Engines The hexagon bolt is perfectly matched and thus suitable for MAN D engines. It has been designed to support reliable performance and optimize the functionality of your engines. Choose the hexagon bolt to maximize the performance of your systems and reduce costly downtime.
HEX SHOULDER STUD - 81904900541 suitable for MAN D engines
Robust Hex Shoulder Stud for Your EnginesDiscover the hex shoulder stud with the comparison number 81904900541 – an essential OEM replacement part suitable for MAN D engines. This stud ensures a reliable connection in applications for diesel and gas engines, particularly in marine and stationary use as well as for locomotives. Weighing only 0.006 kg, it offers user-friendly handling and efficient assembly.
SET SCREW - 81904900537 suitable for MAN D engines
Reliable Set Screw suitable for MAN D EnginesDiscover our set screw with the comparison number 81904900537, an important OEM spare part specifically designed. This product is suitable for MAN D engines and meets the high demands in marine and stationary applications. Weighing 0.34 kg, this set screw provides stability and excellent performance for your machines.Look forward to top-quality OEM spare partsOur set screw is an outstanding OEM spare part that enhances the lifespan and efficiency of your engines. As part of our product range, it meets the manufacturer’s guidelines and ensures a precise connection. Trust in this component, specifically designed for MAN D engines.
SCREW PLUG - 81904900532 suitable for MAN D engines
Precise Information on the Screw Plug Discover our screw plug with the comparison number 81904900532, specially designed for MAN D engines. Weighing only 0.24 kg, this OEM replacement part meets all requirements for marine and stationary applications. Our screw plug ensures a reliable seal and optimizes the efficiency of your engines.
HEXAGON BOLT - 81904900530 suitable for Bosch engines
Robust Hexagon Bolt – Optimal for Diesel and Gas EnginesDiscover our OEM replacement part, the hexagon bolt with the comparison number 81904900530. This product has been specifically designed for a variety of engines and fits optimally in diesel and gas engines.Suitable for Bosch Engines – Reliable IntegrationThe hexagon bolt is suitable for Bosch engines and provides the reliability you need for your applications. Our comparison number 81904900530 ensures that you receive a high-quality replacement part that integrates perfectly into existing systems.
HEXAGON BOLT - 2914552147 suitable for Bosch engines
Excellent Hexagon Bolt with Comparison Number 2914552147Discover the Hexagon bolt, a precise OEM spare part available to you under the comparison number 2914552147. This product is specifically designed to create reliable connections in engines. The Hexagon bolt is ideal for various applications, particularly in the marine and stationary sectors.
HEX DRIVE SCREW - 81904900522 suitable for MAN D engines
Hex Drive Screw for MAN D EnginesDiscover the hex drive screw with the comparison number 81904900522, specifically designed to fit MAN D engines. Weighing only 0.017 kg, this OEM replacement part is essential for ensuring the efficiency of your engines.
SCREW/BOLT - 81904900521 suitable for MAN D engines
Optimal Performance with Comparison Number 81904900521 Discover the premium product with the comparison number 81904900521, a screw/bolt specifically designed to meet your needs. This screw/bolt is part of the category screws and an essential OEM replacement part for use in various engines.
CYLINDER LOCK SCREW - 81904900520 suitable for MAN D engines
Efficient Solution: Cylinder Lock ScrewThe cylinder lock screw with the comparison number 81904900520 is an efficient solution for use in engines. This product is essential for the maintenance and repair of engines. Weighing only 0.01 kg, the cylinder lock screw is compact and easy to handle.
OVAL HEAD TAPPING SCREW - 81904900510 suitable for MAN D engines
Oval Head Tapping Screw for Motor SystemsDiscover the Oval head tapping screw with the comparison number 81904900510. This product is optimally suited to ensure the performance of your machines. It belongs to the category of Screws and is essential for the operation of engines in marine and stationary applications. With a weight of only 0.005 kg, it is easy to handle while still providing the necessary stability.
CYLINDER LOCK SCREW - 81904900507 suitable for MAN D engines
Cylinder Lock Screw for Your Reliable Drive SystemsDiscover the cylinder lock screw with the comparison number 81904900507, an essential OEM replacement part that is perfectly tailored to meet the requirements of MAN D engines. This cylinder lock screw is precisely manufactured and crucial for the safe operation of your engines. Weighing only 0.005 kg, it is ideal for use in various applications where reliability is essential.
CYLINDER LOCK SCREW - 81904900506 suitable for MAN D engines
Cylinder Lock Screw: Your Crucial OEM Replacement PartDiscover the cylinder lock screw with the comparison number 81904900506, an essential OEM replacement part suitable for MAN D engines. This screw belongs to the category of screws and is characterized by its precise fit and high functionality. Weighing only 0.006 kg, this cylinder lock screw is a lightweight yet essential element for the reliability and durability of your engines.Perfect Fit for MAN D EnginesThe cylinder lock screw plays a vital role in the operation of your machines. It allows for secure fastening of the cylinders, thereby significantly contributing to the performance of the engines. This product meets the highest quality standards, enabling you to get the best out of your MAN D engines.
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.