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 LOCK SCREW - 81904900652 suitable for MAN D engines
Cylinder Lock Screw for MAN D EnginesDiscover the cylinder lock screw with the comparison number 81904900652, an essential product that enables a secure connection for engines. This precisely manufactured OEM spare part is suitable for MAN D engines and impresses with its quality and durability. Weighing only 0.01 kg, it is ideal for various applications in marine and stationary technology.
CYLINDER LOCK SCREW - 81904900651 suitable for MAN D engines
Precise Cylinder Lock Screw for Your EngineDiscover the Cylinder Lock Screw, an OEM replacement part with the comparison number 81904900651. This precisely manufactured screw provides optimal security during operation and belongs to the article group of screws. Weighing only 0.006 kg, this Cylinder Lock Screw is particularly handy and easy to install.
CYLINDER LOCK SCREW - 81904900650 suitable for MAN D engines
Cylinder lock screw for your needsDiscover the cylinder lock screw, comparison number 81904900650, an essential OEM spare part suitable for MAN D engines. This cylinder lock screw offers perfect accuracy and stability during operation. Weighing only 0.01 kg, it is ideal for use in demanding applications.
CYLINDER SCREW - 81904900649 suitable for MAN D engines
Cylinder screw suitable for MAN D enginesDiscover our cylinder screw with the reference number 81904900649, tailored to meet the demands of engines. This product is an essential component that you will find in the category of screws. Weighing only 0.05 kg, it offers the perfect combination of robustness and lightness required in demanding applications.
HEX SHOULDER STUD - 81904900646 suitable for MAN D engines
Hex shoulder stud 81904900646 - Quality for EnginesThe Hex shoulder stud with the comparison number 81904900646 is an essential product specifically designed to optimize engine performance. Weighing only 0.02 kg, this stud demonstrates reliable robustness and is the ideal choice for various applications in marine and stationary technology as well as in locomotives.
HEX SHOULDER STUD - 2413450027 suitable for Bosch engines
Hex shoulder stud with reference number 2413450027Discover the hex shoulder stud with reference number 2413450027. This OEM replacement part is supplied for MAN D engines and ensures a precise fit and performance. Using this screw is an efficient solution for your maintenance needs and helps keep your engines running smoothly.Reliable components for enginesWeighing only 0.02 kg, the hex shoulder stud is an ideal component for engines that demand high performance. It is not only robust but also lightweight, which facilitates handling. Rely on the high quality that this OEM replacement part offers to enhance the lifespan of your machines.
CYLINDER LOCK SCREW - 81904900643 suitable for MAN D engines
Cylinder lock screw suitable for MAN D enginesDiscover the cylinder lock screw with the comparison number 81904900643, an essential OEM spare part for your suitable for MAN D engines. This screw ensures an optimal connection of components and thus secures the reliable functionality of your engines. Weighing only 0.045 kg, this cylinder lock screw is not only compact but also powerful.
HEX COLLAR BOLT - 81904900642 suitable for MAN D engines
Precise Hex Collar Bolt for MAN D EnginesThe hex collar bolt with the comparison number 81904900642 is an important OEM replacement part designed specifically for MAN D engines. Weighing only 0.008 kg, it combines low mass with impressive load capacity, making it ideal for demanding applications.Quality and Reliability AssuredThis product is suitable for MAN D engines and belongs to the category "Screws." Each hex collar bolt is manufactured under strict quality standards to meet the needs of our B2B customers. Our focus is on providing you with top-quality components that you can rely on.
HOLLOW SCREW - 81904900632 suitable for MAN D engines
Discover Hollow Screw with Comparison Number 81904900632Discover our product, the Hollow Screw with the comparison number 81904900632. This spare part is an essential component for engines in marine and stationary use. The Hollow Screw weighs only 0.03 kg and offers outstanding quality and reliability that you can expect from an OEM spare part.Precision Fit for MAN D EnginesThis Hollow Screw is specially designed to be used with MAN D engines. With a single OEM spare part, you receive the necessary quality required for the optimal performance of your engines. Rely on the precise fit and durability of this screw.
VENT PLUG - 81904900630 suitable for MAN D engines
Vent Plug: Your Essential Replacement PartThe vent plug with the comparison number 81904900630 is an essential OEM replacement part that is optimally tailored to the demands of engines. This precise screw significantly contributes to the necessary pressure regulation in the engine and is a valuable product specifically designed for seamless integration into the engine structure.Suitable for MAN D EnginesThis OEM replacement part is suitable for MAN D engines and ensures efficient venting that supports the engine's performance. Due to its carefully crafted design, it is a worthwhile investment for companies relying on MAN D engines.
HEXAGON BOLT - 81904900626 suitable for MAN D engines
Precise Equipment with Hexagon BoltDiscover the Hexagon bolt with the comparison number 81904900626, an indispensable OEM replacement part designed for the demanding requirements in marine and stationary applications. This product ensures a stable connection and is therefore a must for your engines.Reliability for MAN D EnginesThe Hexagon bolt is suitable for MAN D engines and offers an exact fit thanks to its precise manufacturing. Weighing only 0.05 kg, the product is not only lightweight but also extremely durable, ensuring smooth operation in demanding environments.
STUD - 81904900623 suitable for MAN D engines
Stud: Reliability for MAN D EnginesThe stud with the comparison number 81904900623 is a durable OEM replacement part specifically designed to meet the highest demands. Weighing 0.45 kg, this component offers optimal stability and is therefore ideally suited for use in challenging environments. This product impresses with a precise fit and safety in your engine application.Precision and Quality for Engine ApplicationsThis stud is compatible with MAN D engines, providing a perfect solution for the maintenance and upkeep of your machines. The careful manufacturing of these OEM replacement parts ensures that your engines can operate efficiently and reliably. Rely on the stability and functionality of this replacement part.
STUD - 81904900622 suitable for MAN D engines
Robust Stud suitable for MAN D EnginesDiscover the powerful stud with the comparison number 81904900622 – a unique product specifically designed for use in MAN D engines. This product belongs to the category of screws and offers top-notch quality for engines in the marine and stationary sectors. Weighing 0.86 kg, this stud is both robust and reliable.
SCREW PLUG - 81904900609 suitable for MAN D engines
Essential Screw Plug with Comparison Number 81904900609The screw plug with the comparison number 81904900609 is an important component for anyone who values quality. This OEM replacement part is specifically designed to support engines optimally. It weighs only 0.055 kg, which significantly simplifies the installation process.Fits MAN D Engines – Quality AssuredThis product is particularly suitable for MAN D engines. As part of our product range, the screw plug offers an excellent solution for your replacement part needs. It meets the high standards for OEM replacement parts that are necessary for reliable performance in diesel and gas engines.
ADJUSTING SCREW - 81904900608 suitable for MAN D engines
Adjusting screw with comparison number 81904900608Discover our adjusting screw with the comparison number 81904900608 – an indispensable product for your engine technology. This adjusting screw is specifically designed to ensure the smooth functioning of your engines. Weighing only 0.1 kg, this OEM replacement part offers the stability and reliability you need.Quality of OEM replacement partsOur product is an OEM replacement part, meaning it meets the high standards required for engines. The adjusting screw is suitable for MAN D engines and allows you to maximize the efficiency and longevity of your machines. The comparison number 81904900608 confirms the high precision and fit you can expect.
CYLINDER LOCK SCREW - 81904900607 suitable for MAN D engines
Cylinder Lock Screw: Your Reliable ProductDiscover the cylinder lock screw with comparison number 81904900607 – an essential OEM replacement part, suitable for MAN D engines. This product ensures a secure fastening and enhances the efficiency of your engines. Weighing only 0.005 kg, the cylinder lock screw is both lightweight and robust – ideal for marine and stationary applications.
HEX SHOULDER STUD - 81904900603 suitable for MAN D engines
Hex shoulder stud with comparison number 81904900603Discover the hex shoulder stud with the comparison number 81904900603, specifically designed for use in demanding environments. This product is a reliable OEM replacement part that offers you quality and durability. Weighing only 0.13 kg, the hex shoulder stud is solid and also easy to handle and install.Suitable for MAN D enginesThe hex shoulder stud is suitable for MAN D engines and belongs to the article group "screws." This OEM replacement part meets all relevant standards required in marine and stationary applications. Rely on the excellent material quality and stability needed for use in specialized applications.
CYLINDER SCREW - 81904900602 suitable for MAN D engines
CYLINDER SCREW with the comparison number 81904900602 suitable for MAN D engines
CYLINDER SCREW - 81904900598 suitable for MAN D engines
Cylinder screw suitable for MAN D enginesDiscover our cylinder screw with the comparison number 81904900598, suitable for MAN D engines. This cylinder screw is part of our special category "screws" and plays a crucial role in the efficiency of your engines in marine and stationary applications. Weighing only 0.005 kg, it ensures a precise fit and stability.OEM replacement parts for optimal performanceWe exclusively offer OEM replacement parts that meet the requirements and standards of the manufacturer. Our cylinder screw with the comparison number 81904900598 is an OEM replacement part specifically designed for use in MAN D engines. Rely on our years of experience in the industry to enhance the operational safety of your engines.
HEX SHOULDER STUD - 81904900595 suitable for MAN D engines
Robust Hex Shoulder Stud with Comparison Number 81904900595Discover our hex shoulder stud with comparison number 81904900595. This product meets the highest standards and is an indispensable OEM spare part. The hex shoulder stud is specifically designed for MAN D engines, ensuring excellent precision. With a weight of only 0.18 kg, it combines strength and lightweight design.Quality for Engines – Suitable for MAN DThe hex shoulder stud is categorized under the article group screws and offers an outstanding solution for your requirements. These OEM spare parts are suitable for MAN D engines as well as many other renowned manufacturers such as MWM, Mercedes-Benz, and Deutz. Rely on quality that has proven itself for over 25 years.
HEX DRIVE SCREW - 81904900591 suitable for MAN D engines
Hex drive screw compatible with MAN D enginesThe hex drive screw with the comparison number 81904900591 is an essential OEM replacement part, custom-made for optimal performance in MAN D engines. Weighing 0.11 kg, it provides perfection and reliability in marine and stationary applications.
CYLINDER SCREW - 81904900588 suitable for MAN D engines
Reliable Cylinder Screw: Comparison Number 81904900588Discover our cylinder screw with the comparison number 81904900588, a reliable OEM spare part designed to function perfectly. This product ensures your engine runs efficiently while enhancing stability and performance.Durable Design for Engines in OperationWeighing only 0.006 kg, the cylinder screw impresses with its lightness while being robust enough to meet the demands of suitable for MAN D engines. Due to its careful manufacturing, it meets the highest standards and is therefore suitable for various applications in the marine and stationary industry.
HEX DRIVE SCREW M6X39-ST-A2B - 81904900587 suitable for MAN D engines
Premium Hex drive screw m6x39-st-a2b for MAN D engines Discover our hex drive screw m6x39-st-a2b with the comparison number 81904900587, which is ideally suited for use in MAN D engines. This product is a reliable spare part that impresses with its quality and durability.
CYLINDER SCREW - 81904900586 suitable for MAN D engines
Cylinder screw suitable for MAN D enginesDiscover our cylinder screw with the comparison number 81904900586, which ensures optimal performance in your engines. This OEM replacement part is specifically designed for demanding applications where reliability is essential. Weighing only 0.005 kg, the cylinder screw provides a secure connection and functionality.Quality product for professional enginesThis cylinder screw is a top-quality product that integrates seamlessly into your machine. Suitable for MAN D engines, it meets the highest standards you would expect from OEM replacement parts. Rely on the durability and precision that forward-looking applications require.
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.