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:
HOLLOW SCREW - 81981500005 suitable for MAN D engines
Excellent Hollow Screw for Your EnginesDiscover the Hollow Screw (comparison number: 81981500005), an essential product specifically designed to fit MAN D engines. This screw stands for reliable functionality and is a crucial component in your engine operation. Weighing only 0.04 kg, it offers easy handling and significantly contributes to the stability of your engine.Top-Quality OEM Replacement Parts for Your MachinesOur Hollow Screw is available as an OEM replacement part and offers high quality, suitable for use in marine and stationary engines as well as locomotives. With this top-notch replacement part, you ensure that your operations run efficiently and smoothly.
VENT PLUG - 81981300722 suitable for MAN D engines
Vent Plug suitable for MAN D EnginesDiscover our vent plug, suitable for MAN D engines, with the comparison number 81981300722. This OEM replacement part offers an excellent fit and is specifically designed for the high demands of marine and stationary engine technology.Tailored Solutions for Your EnginesThe vent plug, suitable for MAN D engines, ensures that your engines operate smoothly. With the comparison number 81981300722, it is perfectly suited to maximize the performance of your units. Rely on this solution and see for yourself the quality.
HOLLOW SCREW - 81981300060 suitable for MAN D engines
Efficiency with Comparison Number 81981300060The hollow screw with the comparison number 81981300060 is a precisely manufactured OEM replacement part designed for the requirements in marine and stationary use. Weighing only 0.02 kg, this hollow screw is not only lightweight but also impresses with its robustness. It meets the high standards necessary for the smooth operation of engines.Reliable Quality Suitable for MAN D EnginesOur hollow screw is suitable for MAN D engines and belongs to the premium article group "Screws." At MOPA Motorparts, we place great importance on offering only OEM replacement parts. These provide a precise fit and long service life, ensuring that you are choosing the best product for your application.
EYE BOLT - 81971160091 suitable for MAN D engines
Optimal Solution: Eye Bolt 81971160091Discover the eye bolt with the comparison number 81971160091, which is essential for the reliable functioning of your engines. This valuable product from the article group screws weighs only 0.01 kg and offers easy handling. Thus, the eye bolt is perfectly suited for precise integration into your applications.Suitable for MAN D EnginesOur eye bolt is optimally suitable for MAN D engines and has been manufactured to original equipment quality. The replacement part ensures that you receive a product that meets the high demands of MAN D engines. Rely on the first-class workmanship and keep your engines performing well with this component.
SCREW PLUG - 81965030671 suitable for MAN D engines
Screw plug suitable for MAN D engines Discover the screw plug with the comparison number 81965030671, specially designed for use in engines. This product is suitable for MAN D engines and belongs to the important category of screws. With this screw plug, you ensure a stable connection in your engines.
SCREW PLUG - 81960020226 suitable for MAN D engines
Screw plug suitable for MAN D enginesDiscover the screw plug with the comparison number 81960020226, a reliable OEM replacement part. This product is specifically designed for MAN D engines and ensures a secure and efficient connection in your engine operation. Weighing only 0.003 kg, the screw plug is not only lightweight but also resilient and durable, ideal for demanding applications.Suitable for MAN D: Quality in every detailThe screw plug ensures that all functions of your engines run smoothly. As an OEM replacement part, it meets the highest standards, which are crucial for the performance and longevity of products in the marine and stationary industries. Rely on the quality and reliability associated with comparison number 81960020226.
SCREW PLUG - 81960020214 suitable for MAN D engines
Premium Screw Plug with Reference Number 81960020214 Present the screw plug with the reference number 81960020214, which is an excellent choice for anyone looking for reliable OEM spare parts. This product is lightweight, weighing only 0.002 kg, and offers a precise fit. The reference number 81960020214 ensures that you receive the correct part for your machinery.
THREADED ROD - 81951905096 suitable for MAN D engines
Robust Threaded Rod: Your OEM Replacement PartDiscover the threaded rod with the comparison number 81951905096, a premium OEM replacement part that is perfectly tailored to the requirements of MAN D engines. Weighing 0.41 kg, this threaded rod offers the necessary robustness and reliability you expect from a product suitable for diesel and gas engines.Quality as a Standard: Suitable for MAN D EnginesOur threaded rod is not just a simple replacement part; it is an essential component developed specifically for MAN D engines. The quality of the OEM replacement part ensures that your engines operate efficiently and have a long service life. Rely on the standards of a manufacturer that give you the assurance that this product meets all requirements.
THREADED ROD - 81951905091 suitable for MAN D engines
High-Performance Threaded Rod for EnginesDiscover the threaded rod with the comparison number 81951905091, suitable for MAN D engines. This OEM replacement part offers you the best quality and ensures reliable performance in various applications, such as marine and stationary use, as well as in locomotives. Weighing only 0.5 kg, this product is easy to handle and install.OEM Replacement Parts Compatible with MAN D EnginesThe threaded rod belongs to the group of screws and is an essential component in machine maintenance. Suitable for MAN D engines, this OEM replacement part provides the reliability you need in your operations. Trust products that meet the strict requirements of the industry.
THREADED ROD - 81951900248 suitable for MAN D engines
Precise Replacement Part: Threaded Rod 81951900248Discover the threaded rod with the comparison number 81951900248 – an indispensable OEM replacement part that is suitable for MAN D engines. Weighing 0.21 kg, this product belongs to the screws category and offers you the reliable performance you expect from a high-quality replacement part.Optimal for Your RequirementsOur threaded rod is designed to function optimally in marine and stationary applications. This OEM replacement part is made from tested materials to ensure maximum durability and efficiency. Trust in quality that has proven itself.
THREADED ROD - 81951900243 suitable for MAN D engines
Reliable Threaded Rod with Comparison Number 81951900243Discover our premium product, the threaded rod with comparison number 81951900243. This reliable OEM replacement part offers excellent fit and functionality that are crucial for your engines. Weighing 0.21 kg, the threaded rod is not only lightweight but also stable – perfect for demanding applications.
THREADED ROD - 81951900240 suitable for MAN D engines
Stable Component for Your ApplicationDiscover the threaded rod with the comparison number 81951900240, which offers optimal performance for your engines. This product is a crucial component designed for demanding applications in diesel and gas engines. Weighing 0.17 kg, this threaded rod is not only lightweight but also extremely durable.Suitable for MAN D EnginesThe threaded rod is suitable for MAN D engines and ensures smooth functionality. At MOPA Motorparts, we place great importance on quality and performance, even with our OEM replacement parts. Our products undergo strict internal controls to ensure they meet the requirements of your engines.
THREADED ROD - 81951900233 suitable for MAN D engines
Reliable Threaded Rod – Your Essential Spare Part Discover our threaded rod with the comparison number 81951900233. This product is suitable for MAN D engines and offers you the reliability you expect as a B2B customer. Weighing 0.255 kg, this component belongs to the screws category and is an essential element for the optimized performance of your engines.Efficient Solutions for MAN D Engines Our threaded rod provides an excellent fit and durability that is appreciated in the industry. This OEM spare part is manufactured to original equipment quality and delivers the performance you need for your application. Trust in the quality of spare parts specifically designed for use in diesel and gas engines, compatible with MAN D engines.
THREADED ROD - 81951900229 suitable for MAN D engines
High-Quality Threaded Rod for Your NeedsDiscover our threaded rod, an OEM replacement part with the comparison number 81951900229. This product is suitable for MAN D engines and meets the high standards of the industry. Weighing only 0.34 kg, this component combines lightness and functionality to meet the requirements for marine and stationary use.Optimal Fit for Best PerformanceThe threaded rod is an essential component for your engines and has been specifically developed as an OEM replacement part. By using high-quality materials, it ensures that your engines operate effectively. Rely on the quality of a product that is suitable for MAN D engines, and secure long-term usability.
THREADED ROD - 81951900225 suitable for MAN D engines
Optimal Threaded Rod for Your NeedsDiscover the threaded rod with the comparison number 81951900225, an essential OEM replacement part specifically designed to work perfectly. This replacement part fits MAN D engines and provides you with the reliability you need for your applications in the marine and stationary sectors. Weighing only 0.024 kg, it is not only lightweight but also extremely functional.Quality for MAN D EnginesThe threaded rod we offer is a top-quality replacement part that meets the highest standards. It delivers a reliable connection and stability that are crucial for the optimal performance of your engines. By using components from the original manufacturer, we ensure that you get the best for your needs.
THREADED ROD - 81951900216 suitable for MAN D engines
Quality Product for High-Performance EnginesDiscover the threaded rod with the comparison number 81951900216, specifically designed as an OEM replacement part suitable for MAN D engines. This product offers robustness and reliability that are essential for your diesel and gas engines. Weighing only 0.175 kg, this threaded rod is ideal for marine and stationary applications.Article Number and ApplicationThe comparison number 81951900216 makes the threaded rod an indispensable component suitable for MAN D engines. This OEM replacement part belongs to the article group screws and ensures that your engine operates smoothly and lasts long. Our products are carefully selected to enable the best results in your machine.
THREADED ROD - 81951900213 suitable for MAN D engines
Threaded rod and its propertiesDiscover the threaded rod, comparison number 81951900213, specifically designed for applications suitable for MAN D engines. This OEM replacement part stands out for its robustness and precise fit. Weighing just 0.28 kg, this product has been developed to provide a reliable connection in various applications.Reliable connection suitable for MAN DThe threaded rod is an essential component that is suitable for MAN D engines and ensures that your engines operate optimally in marine and stationary applications. Trust in the quality of our OEM replacement parts to secure the performance of your machines in the long term.
THREADED ROD - 81951900212 suitable for MAN D engines
Threaded Rod – Comparison Number 81951900212Discover our threaded rod, known by the comparison number 81951900212. This product from the category screws is suitable for MAN D engines and offers the optimal solution for numerous applications. Weighing only 0.11 kg, the threaded rod impresses with its versatility and robustness.
THREADED ROD - 81951900211 suitable for MAN D engines
Precision Threaded Rod for MAN D EnginesDiscover the threaded rod with the comparison number 81951900211, specifically designed to enable optimal performance in your engines. This OEM replacement part offers precision and is essential for anyone who relies on reliability in their field. Weighing only 0.027 kg, this product ensures easy handling and installation.
THREADED ROD - 81951900208 suitable for MAN D engines
Efficient Threaded Rod Suitable for MAN D EnginesDiscover the Threaded rod with the comparison number 81951900208, an essential OEM replacement part that supports the performance of your machines. Weighing 0.34 kg, this OEM replacement part offers a lightweight yet robust solution that meets the highest demands.Optimal Quality for EnginesThis OEM replacement part belongs to the article group Screws and is suitable for MAN D Engines. With precise manufacturing and the selection of high-quality materials, you receive a component that offers optimal functionality. Trust in the quality you expect from OEM replacement parts to extend the lifespan of your engines.
THREADED ROD - 81951900205 suitable for MAN D engines
Threaded Rod with Comparison Number 81951900205Discover the threaded rod with the comparison number 81951900205, an essential OEM spare part designed for MAN D engines. This threaded rod is not only functional but also engineered for the highest standards of quality. Weighing only 0.125 kg, it is both lightweight and robust, making it ideal for use in marine and stationary engines.Quality and Reliability for MAN D EnginesThis product is suitable for MAN D and ensures the high quality expected from OEM spare parts. Each part is thoroughly tested to meet the specific requirements of our customers. Rely on this dependable component to ensure the longevity and smooth operation of your engines.
THREADED ROD - 81951900204 suitable for MAN D engines
Threaded rod with reference number 81951900204Discover our threaded rod with the reference number 81951900204, an essential OEM spare part specifically designed for MAN D engines. Weighing only 0.08 kg, this product impresses with excellent fit and durability. It ensures that your engines can be operated efficiently and safely.
THREADED ROD - 81951900203 suitable for MAN D engines
Threaded rod with comparison number 81951900203Discover our threaded rod with the comparison number 81951900203, an indispensable OEM spare part specifically designed for use in engines. This threaded rod meets the highest requirements and offers the quality you need for the reliable operation of your machines.Suitable for MAN D – Optimal performanceThe threaded rod is suitable for MAN D engines and ensures reliable functionality. Weighing only 0.087 kg, this spare part is not only lightweight but also strong enough to withstand the stresses in demanding applications. By using OEM spare parts, you ensure that your engines have the best possible quality.
THREADED ROD - 81951900196 suitable for MAN D engines
Efficient Replacement Element for Your EnginesDiscover the threaded rod with the comparison number 81951900196, an indispensable product specifically designed for diesel and gas engines. This threaded rod is compatible with MAN D engines and helps maintain the performance of your machines at a high level. Rely on OEM replacement parts that meet the highest standards and are ideal for professional applications.Optimal Fit for MAN D EnginesThe threaded rod, suitable for MAN D, impresses with its precise manufacturing and durability. Weighing only 0.014 kg, this product offers an outstanding blend of stability and lightness. By using OEM replacement parts, you ensure that your engines run reliably at all times.
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.