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Screw nuts – secure fastening for engine systems

Screw nuts are fundamental components for assembling and securing mechanical structures, especially in engine and industrial systems. Whether used in combustion engines, marine machinery or stationary equipment – high-quality screw nuts ensure reliable fastening under high loads, vibrations and temperature fluctuations. They are essential for safety, serviceability and long-term performance.

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NUT - 5519900060 suitable for MTU engines

NUT - 5519900060 suitable for MTU engines

Reliable Nut for Your Engines Discover the Nut with the comparison number 5519900060 – a reliable OEM spare part, perfectly suited for your systems. This product belongs to the article group of Nuts and is _compatible with MTU engines_, particularly for applications where robustness and longevity are required.Suitable Solutions for Various Applications The comparison number 5519900060 ensures precise fitting for _engines_. _Compatible with the series 331_ as well as the engine type 12V331TC92, this OEM spare part offers you the opportunity to utilize superior quality specifically developed for these requirements.

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NUT - 5509900353/45 suitable for MTU engines

NUT - 5509900353/45 suitable for MTU engines

Stick to the comparison number 5509900353/45Discover our Nut with the comparison number 5509900353/45. As an important OEM spare part, it is ideally suited for use in MTU engines, particularly fitting the series 331 as well as the engine type 12V331TC92. Rely on quality standards that are essential in demanding environments such as marine applications and stationary systems.

Sale price: €203.39Regular price:€225.99(10% saved)
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NUT - 5509900353 suitable for MTU engines

NUT - 5509900353 suitable for MTU engines

Reliable Nut suitable for MTU engines Experience the best in quality with our nut (comparison number: 5509900353), which secures an essential connection in engines. This product meets the standards for OEM (Original Equipment Manufacturer) and ensures optimal performance in various applications, especially in engines suitable for the MTU series 331. The perfect design of this nut ensures that you receive a reliable component for your engines.Technical specifications for the highest demands Weighing 0.19 kg with compact dimensions of 4.4 cm in length and width and 3.2 cm in height, this product is functional and practical to handle. The resilient construction of the nut allows for a long lifespan and is thus a valuable addition to your required OEM replacement parts. This quality is ideal for significantly improving the efficiency of your engines suitable for MTU engines.

Sale price: €99.45Regular price:€110.50(10% saved)
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UNION NUT - 5509900254 suitable for MTU engines

UNION NUT - 5509900254 suitable for MTU engines

Union nut: Essential Product for EnginesDiscover our union nut, the premium product for diesel and gas engines. With the comparison number 5509900254, this OEM spare part is particularly reliable. Its precision fit ensures a worry-free application in your engines.Quality of OEM Spare PartsOur union nut is an OEM spare part specifically designed to work well with MTU engines. Manufactured to achieve the highest economic and technical efficiency, our engine parts are indispensable for your needs in marine and stationary applications as well as in locomotives.

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NUT - 5502000972 suitable for MTU engines

NUT - 5502000972 suitable for MTU engines

Quality of OEM Replacement Parts Without CompromisesThe Nut with the comparison number 5502000972 stands out due to its reliable quality and is an indispensable product when it comes to MTU engines. These OEM replacement parts provide you with the assurance that you are relying on components that are suitable for your specific requirements in marine and stationary applications.Suitable for MTU – Reliable PerformanceThis OEM replacement part is precisely designed to meet the needs of your MTU engines, especially the engine type 12V331TC92. The Nut has been manufactured under strict quality controls to ensure a proper fit, allowing your equipment to operate efficiently and safely.

Sale price: €118.65Regular price:€131.83(10% saved)
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NUT - 5502000072 suitable for MTU engines

NUT - 5502000072 suitable for MTU engines

Precise Product: Nut (Comparison Number 5502000072)The nut with the comparison number 5502000072 is an essential OEM spare part specifically designed for use in engines of the series 331. This spare part has a lightweight of only 0.108 kg, making it easy to handle and ensuring optimal performance. This nut is an indispensable component suitable for engines that rely on reliability.

Sale price: €192.64Regular price:€214.05(10% saved)
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UNION NUT - 5500780172 suitable for MTU engines

UNION NUT - 5500780172 suitable for MTU engines

Reliable Union Nut Compatible with MTU EnginesThe union nut with comparison number 5500780172 is an essential OEM spare part, specifically manufactured for MTU engines. This product ensures that all components provide a secure hold. With its perfect fit, the union nut is specifically suitable for the series 331 and particularly designed for the engine type 12V331TC92, ensuring that the performance of your engines is always maintained.Significance of Comparison Number 5500780172With the comparison number 5500780172, you can easily identify the OEM spare part. This number helps you select the correct component for the desired MTU engines. OEM spare parts are sourced from manufacturer facilities. Choosing this reliable component significantly contributes to the optimal performance of your engines and prevents accelerated wear.

Sale price: €31.43Regular price:€34.92(10% saved)
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NUT - 5500720172 suitable for MTU engines

NUT - 5500720172 suitable for MTU engines

Nut: Your Ideal OEM Spare PartDiscover the nut with the comparison number 5500720172, an essential OEM spare part for your demanding applications. This product belongs to the article group "nuts" and is specially suited for MTU engines, particularly for the series 331.Precise Fit for MTU EnginesThe exquisite manufacturing ensures excellent fit and performance in engines that are suitable for engine types 12V331TC92. Rely on this OEM spare part to ensure that your machines operate efficiently and meet the high standards of marine and stationary technology.

Sale price: €630.90Regular price:€701.00(10% saved)
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NUT - 5500720072 suitable for MTU engines

NUT - 5500720072 suitable for MTU engines

Reliable Nut suitable for MTU EnginesDiscover the Nut with the reference number 5500720072, an essential OEM spare part, ideal for your MTU engines. These tested OEM spare parts ensure optimal fit and load-bearing capacity. Due to the special design, the Nut is suitable for the MTU model series 331, ensuring smooth engine operation, especially with the engine type suitable for 12V331TC92.

Sale price: €57.07Regular price:€63.41(10% saved)
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COLLAR NUT - 5410170171 suitable for MTU engines

COLLAR NUT - 5410170171 suitable for MTU engines

Robust Tool for Industrial RequirementsThe tool with the comparison number 5410170171 is an essential tool for professionals looking to work efficiently with MTU engines. Weighing only 0.024 kg and featuring compact dimensions of 2.6 cm in length and width, as well as 1.6 cm in height, this item can be easily used in tight spaces, enabling you to perform precise maintenance without any restrictions on mobility.High Compatibility: Suitable for MTU EnginesThe tool is specifically suitable for the series 2000 and compatible with the engine types 16V2000M90. With its sophisticated design, it meets the highest technical standards, ensuring optimal performance and reliability during use. Trust in the quality you will find at MOPA Motorparts - a choice that makes every maintenance task more efficient and durable.

Sale price: €14.39Regular price:€15.99(10% saved)
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HEX COLLAR NUT - 5379900150 suitable for MTU engines

HEX COLLAR NUT - 5379900150 suitable for MTU engines

Robust Hex Collar Nut - Comparison Number 5379900150The hex collar nut with the comparison number 5379900150 is a durable OEM replacement part that meets the highest demands for functionality. This nut exhibits high robustness and ensures a reliable connection in your machinery. It is designed to provide optimal performance under demanding operating conditions.

Sale price: €36.27Regular price:€40.30(10% saved)
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NUT - 5371840072 suitable for MTU engines

NUT - 5371840072 suitable for MTU engines

Excellent Nut: Essential for Your EngineDiscover the excellence of our nut with the comparison number 5371840072. This valuable product impresses with precision and durability and is listed in the nuts category. It is specifically designed to function flawlessly in applications suitable for MTU engines – particularly for the series 331 and the engine type 12V331TC92. Weighing 0.392 kg, this OEM replacement part fits perfectly in the hand and meets all requirements of professional users.Benefits of OEM Replacement Parts for EnginesChoosing the right parts has a significant impact on the performance of your engines. Our replacement parts with the comparison number 5371840072 are OEM parts, suitable for MTU. Unlike aftermarket products, which often have quality deficiencies, OEM replacement parts ensure that all specifications of the manufacturer are respected. The uncompromising quality supports optimal functionality in any engine, suitable for MTU.

Sale price: €405.23Regular price:€450.26(10% saved)
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NUT - 533M08722/1 suitable for MTU engines

NUT - 533M08722/1 suitable for MTU engines

Precise Product: Nut with Excellent FitDiscover the nut with the comparison number 533M08722/1, an essential OEM spare part for your technical applications. This nut belongs to the group of nuts and stands out with its exact fit, making it ideal for numerous uses.

Sale price: €285.82Regular price:€317.58(10% saved)
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NUT - 533M08006/1 suitable for MTU engines

NUT - 533M08006/1 suitable for MTU engines

Premium Nut with Comparison Number 533M08006/1 Discover the Nut with the comparison number 533M08006/1, specifically developed for high-performance applications. This OEM spare part is distinguished by top-notch quality and precise workmanship.

Sale price: €285.82Regular price:€317.58(10% saved)
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NUT - 531SK4958 suitable for MTU engines

NUT - 531SK4958 suitable for MTU engines

Changes in the Area: Nut Suitable for MTU EnginesChoose the nut (comparison number: 531SK4958), a product suitable for MTU engines. This OEM spare part ensures a precise fit and supports the reliability of your engines.

Sale price: €8.97Regular price:€9.97(10% saved)
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TENSIONING NUT - 531SK2767 suitable for MTU engines

TENSIONING NUT - 531SK2767 suitable for MTU engines

Excellent Product for MTU EnginesDiscover the Tensioning nut with the comparison number 531SK2767, which provides an optimal solution for your engines. This OEM replacement part offers proven quality and durability that are essential for reliable operation. The state-of-the-art design is specifically suitable for MTU engines and ensures that your system continues to perform optimally under pressure.Robust Materials for Long-Lasting PerformanceWeighing 86.6 kg, the Tensioning nut offers stability and security for all mechanical components working together. As part of our premium category of OEM replacement parts, we provide solutions that meet the high demands of marine and stationary applications. Each product undergoes strict internal controls to meet the highest standards.

Sale price: €22.01Regular price:€24.45(10% saved)
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NUT - 5311550072 suitable for MTU engines

NUT - 5311550072 suitable for MTU engines

Robust Nut for All Engine NeedsThe Nut with the comparison number 5311550072 is an essential OEM spare part designed to be suitable for MTU engines. This product provides an excellent solution for marine and stationary applications, ensuring the optimal functionality of your engines under demanding conditions.Optimal Fit for StabilityWeighing 61.7 kg, the Nut offers solid stability and reliability for your applications. As an OEM spare part, this component is designed to be suitable for various engines in the industrial sector. The precise sizing ensures everything fits perfectly, which in turn supports the longevity of the entire system.

Sale price: €171.81Regular price:€190.91(10% saved)
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UNION NUT - 5279900254 suitable for MTU engines

UNION NUT - 5279900254 suitable for MTU engines

Excellent Union Nut for MTU Engines Discover the union nut with the comparison number 5279900254, designed as an OEM replacement part. This product is an essential component, suitable for MTU engines, and meets the highest quality standards to ensure optimal functionality of your engine.

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UNION NUT - 5279900054 suitable for MTU engines

UNION NUT - 5279900054 suitable for MTU engines

Robust Union Nut for Your NeedsDiscover our product, the union nut with the comparison number 5279900054. This OEM replacement part is perfectly suited for your MTU engines. Designed with a precise fit, this component achieves optimal functionality in various applications, whether marine or stationary.Quality through Careful SelectionOur OEM replacement part, the union nut, comes from a manufacturer that sets high standards. The comparison number 5279900054 represents precise products that undergo strict internal controls. With over 25 years of experience, you can rely on our expertise in the delivery of engine replacement parts.

Sale price: €29.86Regular price:€33.18(10% saved)
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NUT - 5269900051 suitable for MTU engines

NUT - 5269900051 suitable for MTU engines

Reliable Nut with Comparison Number 5269900051Experience the performance of our Nut with the comparison number 5269900051, specifically designed to be suitable for MTU engines. This component classified in the category "Nuts" offers excellent fit and operational reliability for your engines. Rely on OEM replacement parts as they provide crucial advantages compared to aftermarket products.Essential for the Requirements of MTU EnginesWeighing 25.1 kg, this OEM replacement part is ideally suited for applications in diesel and gas engines in marine as well as stationary environments. Each Nut is an indispensable product tailored to the specifications of engines, specifically suitable for MTU. Quality and reliability are our top priorities.

Sale price: €7.11Regular price:€7.90(10% saved)
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NUT - 5249900851 suitable for MTU engines

NUT - 5249900851 suitable for MTU engines

Reliable OEM Replacement Part: Nut with Comparison Number 5249900851Discover our product, the nut with the comparison number 5249900851, which is listed in the category "nuts" under OEM replacement parts. With its robust construction and a weight of 5.1 kg, this nut provides solid performance that supports the efficiency of your engines.Optimal: Suitable for MTU EnginesThis nut is suitable for MTU engines. It not only ensures a precise fit but also improves the performance of the engines. By using tested materials and careful manufacturing, our OEM replacement part meets the highest standards, making it ideal for use in demanding environments.

Sale price: €11.59Regular price:€12.88(10% saved)
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HEXAGON NUT - 5249900751 suitable for MTU engines

HEXAGON NUT - 5249900751 suitable for MTU engines

Reliable Hexagon Nut: Your Suitable Replacement Part Discover the first-class hexagon nut, designed for MTU engines, with the comparison number 5249900751. This OEM replacement part belongs to the category of nuts and impresses with its excellent fit and reliability. Perfect for all applications involving MTU engines, the hexagon nut ensures electrical connections and contributes to operational safety.OEM Replacement Parts for Your Requirements At MOPA Motorparts, you will receive products exclusively from OEM manufacturers. The hexagon nut offers proven quality standards, making it an excellent choice compared to aftermarket parts. Why settle for less when you can work with this highest quality standard?

Sale price: €4.00Regular price:€4.45(10% saved)
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NUT - 5249900451 suitable for MTU engines

NUT - 5249900451 suitable for MTU engines

Reliable Nut for MTU EnginesDiscover the reliable nut suitable for MTU engines and benefit from the excellent quality of our OEM spare parts. With the comparison number 5249900451, we ensure that this product is ideal for your applications and meets all requirements.Honest Quality of OEM Spare PartsOur OEM spare part offers you an outstanding solution for your needs in marine and stationary applications. Unlike aftermarket solutions, our products are characterized by highly consistent standardization, as they have been designed to fit MTU engines. Trust in quality that combines efficiency with consistent performance in your engines.

Sale price: €2.25Regular price:€2.50(10% saved)
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UNION NUT - 5249900154 suitable for MTU engines

UNION NUT - 5249900154 suitable for MTU engines

Union nut with reference number 5249900154Discover our Union nut, listed under the reference number 5249900154. This OEM replacement part is specifically designed to meet the requirements of engines in the marine and industrial sectors. The product is ideally suited for use in engines that are compatible with MTU engines.Quality through internal controlWeighing 0.648 kg, the Union nut impresses with its stability and durability. Each individual OEM replacement part undergoes strict internal controls to ensure that it meets these high quality standards. This way, the functionality of your engines, compatible with MTU, is always assured.

Sale price: €224.41Regular price:€249.34(10% saved)
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Function and advantages

Screw nuts work in combination with bolts or studs to create strong, threaded connections. In engine systems, a proper engine nut or motor nut must withstand dynamic forces and temperature-related expansion. Key benefits include:

  • Secure locking of mechanical components under stress
  • Resistance to loosening under vibration
  • Easy assembly and disassembly for maintenance

In high-precision systems, mechanical nuts often feature locking mechanisms, flange bases or specialized coatings to enhance grip and corrosion resistance.

Applications and types

Engine nuts are used to fasten cylinder heads, manifolds, brackets and rotating assemblies. Motor nuts are common in alternators, starters, pumps and other auxiliary components. Depending on the application, mechanic nuts can be hex nuts, locknuts, self-locking nuts or high-temperature nuts.

For industrial and marine use, mechanical nuts are often made of stainless steel or alloyed materials to withstand corrosion, vibration and thermal cycles. Our range includes all standard types and sizes suitable for MTU, MAN, Volvo Penta, Deutz and MWM engines.

Availability and sourcing

We stock a wide selection of screw nuts and related fasteners for engines, industrial equipment and marine applications. As experienced screws and nuts suppliers, we provide OEM-quality with fast delivery, technical support and high availability – ideal for overhauls, repairs or production sourcing.

Screw nuts for industrial and marine engines – engine nut, motor nut, mechanical nuts, mechanic nuts – OEM replacements

FAQ

What are screw nuts used for in engines?
Screw nuts in engines are used to secure critical components such as cylinder heads, exhaust systems, brackets and rotating parts. They must withstand heat, vibration and mechanical stress without loosening.

What is the difference between mechanical nuts and mechanic nuts?
“Mechanical nuts” refers to all technical fasteners used in machines, while “mechanic nuts” is a more informal term often used in workshop contexts. Both describe the same parts but are used in different settings.

Where can I buy engine nuts and motor nuts?
Engine nuts and motor nuts are available from specialized screws and nuts suppliers like us. We offer a wide range of standard and special fasteners for diesel and gas engines, with OEM compatibility and fast shipping.

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