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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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UNION NUT - 81906300058 suitable for MAN D engines

UNION NUT - 81906300058 suitable for MAN D engines

Union Nut: Efficient Solution for EnginesDiscover the union nut with the comparison number 81906300058, a product specifically designed to harmonize optimally with MAN D engines. This OEM spare part offers you excellent precision and quality that are essential for the most demanding applications in the marine and industrial sectors.Technical Details of the Union NutThe union nut with the comparison number 81906300058 weighs only 0.175 kg and belongs to the group of nuts. It is precisely manufactured for MAN D engines and meets the highest standards. By using quality materials, this OEM spare part provides a long service life and reliable functionality.

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UNION NUT - 81906300057 suitable for MAN D engines

UNION NUT - 81906300057 suitable for MAN D engines

Union nut compatible with MAN D enginesDiscover the union nut with the comparison number 81906300057 – a quality product specifically designed for MAN D engines. This union nut belongs to the category of nuts and offers the reliability you expect from an OEM replacement part. Rely on the durability and precision of this important component for your engines.Lightweight and efficient to useWeighing only 0.07 kg, the union nut is particularly handy and ensures simple installation. As an OEM replacement part, it upholds the necessary quality for engines used in demanding applications such as marine and stationary technology. Count on the performance and compatibility of the union nut, which is suitable for MAN D engines.

Sale price: €29.04Regular price:€32.27(10% saved)
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UNION NUT - 81906300055 suitable for MAN D engines

UNION NUT - 81906300055 suitable for MAN D engines

Union Nut: Essential OEM Spare PartDiscover the union nut with the comparison number 81906300055 – an essential OEM spare part that is optimized for a variety of applications. Weighing only 0.08 kg, this product is not only lightweight but also crucial for the smooth operation of your MAN D engine. Rely on quality specifically designed to support the longevity and performance of your engines.Reliable Connection for EnginesThis union nut belongs to the category of nuts and is designed to be compatible with MAN D engines. It provides a solid connection of the individual engine components and prevents inaccuracies that could lead to performance losses. With us, you will find OEM spare parts from reputable manufacturers, giving you the peace of mind you need for your machines.

UNION NUT - 81906300053 suitable for MAN D engines

UNION NUT - 81906300053 suitable for MAN D engines

Precise Solution: Union Nut suitable for MAN DExperience the union nut with the comparison number 81906300053, specifically developed to meet the requirements of MAN D engines. This OEM replacement part belongs to the category of nuts and is an essential component for your engine applications. Weighing only 0.001 kg, it offers a solid connection despite its lightweight construction, ensuring the longevity of your engines.Quality of OEM Replacement PartsThe union nut with the comparison number 81906300053 is an OEM replacement part that meets the highest standards. With the quality these products provide, you can be sure you are well-equipped to maximize the efficiency of your machines. It is suitable for MAN D engines and ensures a perfect fit to support performance.

UNION NUT - 81906300051 suitable for MAN D engines

UNION NUT - 81906300051 suitable for MAN D engines

Union nut suitable for MAN D engines: Quality that convincesDiscover our union nut (comparison number: 81906300051), developed as an OEM spare part suitable for MAN D engines. This product meets the highest standards and ensures reliable fastening and sealing in your engines. Weighing only 0.01 kg, this spare part is both lightweight and extremely robust and durable.Optimal performance for your applicationsThe union nut is an essential component that is perfectly tailored to the needs of users in marine and stationary applications. This OEM spare part is ideal for ensuring the efficiency and reliability of your MAN D engines. Rely on the precision and quality to enhance the functionality of your applications.

UNION NUT - 81906300050 suitable for MAN D engines

UNION NUT - 81906300050 suitable for MAN D engines

Union nut with reference number 81906300050Discover the union nut with reference number 81906300050, an essential component for the reliable operation of your engines. This union nut belongs to the category of nuts and provides a perfect solution for your requirements. Weighing only 0.02 kg, it is both robust and lightweight.Optimal solution suitable for MAN D enginesThis product is suitable for MAN D engines and ensures that your applications are optimally connected. Our union nut is an OEM replacement part that ensures durability and reliability in demanding environments. Trust in the quality you expect from OEM replacement parts.

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UNION NUT - 81906300049 suitable for MAN D engines

UNION NUT - 81906300049 suitable for MAN D engines

Union Nut for MAN D EnginesDiscover the union nut with the comparison number 81906300049, an essential OEM spare part specifically designed for use in engines. This product weighs only 0.06 kg and is suitable for MAN D engines to maximize efficiency and reliability in your application. Rely on the quality that OEM spare parts provide.Precision and Quality for Your ApplicationThe union nut is an important component when it comes to ensuring the functionality of your machines. Suitable for MAN D engines, this product offers the robustness and durability you expect from an OEM spare part.

Sale price: €18.49Regular price:€20.54(10% saved)
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UNION NUT - 81906300038 suitable for MAN D engines

UNION NUT - 81906300038 suitable for MAN D engines

Efficient Union Nut for Demanding ApplicationsDiscover our premium product, the union nut with the comparison number 81906300038. This OEM spare part has been meticulously crafted to ensure an excellent fit. Perfectly suited for applications in marine and stationary environments, the union nut ensures that your engines operate reliably and efficiently.

HEXAGON NUT - 81906300036 suitable for MAN D engines

HEXAGON NUT - 81906300036 suitable for MAN D engines

Hexagon nut suitable for MAN D enginesDiscover the hexagon nut (comparison number: 81906300036), an essential product that is suitable for MAN D engines. This nut belongs to the category of nuts and is manufactured for the demanding requirements in marine and stationary use. Weighing only 0.01 kg, it offers an ideal combination of lightness and robustness.OEM replacement parts – Quality that convincesUnlike aftermarket alternatives, our OEM replacement parts offer the highest quality. The hexagon nut with comparison number 81906300036 is an OEM replacement part and provides an excellent fit suitable for MAN D engines. Rely on the reliability of our products to maximize the efficiency of your engines.

UNION NUT - 81906300030 suitable for MAN D engines

UNION NUT - 81906300030 suitable for MAN D engines

Union Nut 81906300030: Your Reliable Spare PartDiscover the union nut with the comparison number 81906300030, which is an essential component in your engines. This product is an OEM spare part that meets the requirements for reliability and performance. Weighing only 0.025 kg, the union nut is light yet robust, perfectly suited for various applications in the marine and industrial sectors.Suitable for MAN D EnginesThe union nut 81906300030 is specifically designed to be compatible with MAN D engines. As an OEM spare part, it offers the precision and quality that you would expect from a manufacturer. Our strict internal controls ensure that this union nut meets high standards and helps ensure that your engines operate optimally.

UNION NUT - 81906300026 suitable for MAN D engines

UNION NUT - 81906300026 suitable for MAN D engines

Union nut for Reliable ApplicationsDiscover the union nut with the comparison number 81906300026, specifically designed to ensure optimal performance for engines. This outstanding replacement part belongs to the group of nuts and meets the highest quality standards. Weighing only 0.003 kg, the union nut is robust yet lightweight, making it ideal for use in challenging environments.Suitable for MAN D EnginesThe union nut is suitable for MAN D engines, thereby optimizing compatibility and performance for your engine. Its precise fit ensures that individual components work together effectively. Trust high-quality replacement parts to maximize the efficiency and reliability of your marine and stationary engines.

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SLOTTED ROUND NUT - 81906200127 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200127 suitable for MAN D engines

First-Class Slotted Round Nut with Comparison Number 81906200127 Discover the slotted round nut, suitable for MAN D engines, with the comparison number 81906200127. This product belongs to the article group "Nuts" and meets the high demands of our B2B customers.OEM Spare Parts: Quality Without Compromise The comparison number 81906200127 represents our valuable OEM spare parts, which come directly from the manufacturer. With us, you can rely on receiving products that are characterized by durability and are ideal for industrial applications.

Sale price: €38.12Regular price:€42.35(10% saved)
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SLOTTED ROUND NUT - 81906200125 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200125 suitable for MAN D engines

Slotted Round Nut for Your Engine NeedsDiscover the slotted round nut with the comparison number 81906200125, an OEM replacement part specifically suitable for MAN D engines. This product offers the performance and precision you expect from OEM replacement parts.Suitable for MAN D Engines – Precision Meets QualityThe slotted round nut belongs to the category of nuts and is suitable for all applications tailored to MAN D engines. With this slotted round nut, you will achieve optimal results in assembly to ensure the efficiency of your engines.

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SLOTTED ROUND NUT - 81906200122 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200122 suitable for MAN D engines

Learn more about our OEM replacement partDiscover the slotted round nut with the comparison number 81906200122, an essential OEM replacement part specifically designed for various applications in the industry. This slotted round nut ensures optimal functionality and performance of your engines.Suitable for MAN D enginesOur slotted round nut is suitable for MAN D engines. This product stands out with its high quality and is ideal as an OEM replacement part. Rely on the precision our products offer to maximize the efficiency of your machines.

Sale price: €371.53Regular price:€412.82(10% saved)
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SLOTTED ROUND NUT - 81906200121 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200121 suitable for MAN D engines

Premium Slotted Round Nut: Comparison Number 81906200121The slotted round nut with comparison number 81906200121 is an essential replacement part suitable for MAN D engines. As part of our product group Nuts, this slotted round nut provides optimal performance and safety for your engines.Trust through OEM Replacement PartsOur slotted round nut is an OEM replacement part sourced from the manufacturer. Unlike aftermarket parts, the OEM replacement part ensures that your machines deliver the best possible performance. With comparison number 81906200121, you receive a precise component that meets the high demands of your applications.

Sale price: €14.91Regular price:€16.56(10% saved)
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SLOTTED ROUND NUT - 81906200107 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200107 suitable for MAN D engines

Precise Slotted Round Nut suitable for MAN D EnginesDiscover our slotted round nut (comparison number: 81906200107), a premium OEM spare part that harmonizes optimally with MAN D engines. This slotted round nut ensures an exact fit and maximum reliability, thereby maximizing the performance of your engines.Excellent OEM Spare Parts for the Highest StandardsThis product is suitable for MAN D and ensures that your engines operate reliably in both marine and stationary applications. By choosing the OEM spare part, you are investing in quality and durability that meets your high standards.

Sale price: €316.02Regular price:€351.13(10% saved)
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SLOTTED ROUND NUT - 81906200105 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200105 suitable for MAN D engines

Slotted round nut, suitable for MAN D enginesDiscover the slotted round nut with the comparison number 81906200105, specifically designed for MAN D engines. This OEM replacement part offers optimal fit and ensures high durability in your drive system. By choosing OEM products, you benefit from trustworthy quality that helps enhance the efficiency of your engines.

Sale price: €11.88Regular price:€13.20(10% saved)
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SLOTTED ROUND NUT - 81906200102 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200102 suitable for MAN D engines

Premium Slotted Round Nut for MAN D EnginesDiscover the slotted round nut with the comparison number 81906200102, specifically designed for optimal use in MAN D engines. This product offers a precise fit and ensures the necessary stability for your engine installations. Weighing 0.235 kg, this slotted round nut meets the requirements for durability and reliability.Quality Products for Your Marine ApplicationsThis slotted round nut is an OEM replacement part that meets the highest standards. Suitable for MAN D engines, this product ensures long-term usability. As a B2B customer, you benefit from this material quality that is specially designed for demanding use in marine and stationary engines.

SLOTTED ROUND NUT - 81906200101 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200101 suitable for MAN D engines

Discover the Slotted Round Nut with Comparison Number 81906200101Discover the slotted round nut with comparison number 81906200101, an essential OEM spare part designed specifically for applications in marine and stationary engines. Weighing 0.336 kg, this product offers precise fit and performance. The slotted round nut is a crucial component that supports the functionality of your devices.

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SLOTTED ROUND NUT - 81906200097 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200097 suitable for MAN D engines

Quality Slotted Round Nut with Comparison Number 81906200097Discover the slotted round nut with the comparison number 81906200097, specially developed to function optimally in engines from renowned manufacturers. This slotted round nut weighs 0.42 kg and is your reliable replacement part to maximize the performance of your engines.OEM Replacement Parts for MAN D EnginesOur slotted round nut belongs to the group of OEM replacement parts. Unlike aftermarket products, we provide you with parts of the highest fit and quality. The comparison number 81906200097 represents the authenticity and high standard you can expect from an OEM replacement part. It is designed to fit MAN D engines, ensuring that you are using technically flawless parts.

Sale price: €88.83Regular price:€98.70(10% saved)
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SLOTTED ROUND NUT - 81906200095 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200095 suitable for MAN D engines

Precision Slotted Round Nut for High DemandsDiscover the slotted round nut with the comparison number 81906200095, an indispensable product for high-performance engines. This slotted round nut belongs to the category of nuts and offers outstanding accuracy for engines used in various applications, particularly in marine and stationary settings. Weighing only 0.242 kg, it allows for easy assembly, significantly improving your workflows.

SLOTTED ROUND NUT - 81906200076 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200076 suitable for MAN D engines

Reliable Slotted Round Nut: Comparison Number 81906200076Discover the slotted round nut with comparison number 81906200076, which has been specially designed to provide top performance. This product is an essential OEM spare part for your engines and weighs 0.205 kg, ensuring optimal functionality.Suitable for MAN D EnginesThe slotted round nut is suitable for MAN D engines and offers a smooth installation and a secure connection in your systems due to its precise workmanship. Rely on this product to maximize the efficiency and longevity of your engines.

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SLOTTED ROUND NUT - 81906200060 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200060 suitable for MAN D engines

Slotted Round Nut 81906200060 for MAN D EnginesDiscover the slotted round nut with the comparison number 81906200060, which has been specifically designed as an OEM replacement part. This product is suitable for MAN D engines and belongs to the category of nuts. It is essential for the safe operation of your engines and ensures maximum efficiency.Robust Construction for Demanding ApplicationsWeighing 0.32 kg, the slotted round nut provides the durability you need for marine and stationary applications. As an OEM replacement part, it impresses with its longevity and reliability, making it the ideal component for your system that meets the demands of a challenging environment.

Sale price: €55.10Regular price:€61.22(10% saved)
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SLOTTED ROUND NUT - 81906200057 suitable for MAN D engines

SLOTTED ROUND NUT - 81906200057 suitable for MAN D engines

Reference Number 81906200057: Slotted round nut suitable for MAN D enginesThe slotted round nut with the reference number 81906200057 is a product specifically designed to fit MAN D engines. This OEM spare part supports the secure connection of components and ensures optimal function during ongoing engine operation. The quality of the slotted round nut meets the demanding requirements suitable for engines from the manufacturer MAN D. Thus, you receive a product precisely tailored to the operating conditions of these engines.Dimensions of the slotted round nut optimally matched for MAN D enginesWith a length and width of 7.7 cm each, a height of 0.8 cm, and a weight of 0.03 kg, this slotted round nut is optimally sized. It is specifically designed as an OEM spare part suitable for MAN D engines to ensure stable and reliable fastening. The compact dimensions facilitate assembly and integration into existing engine systems appropriate for this manufacturer.

Sale price: €33.31Regular price:€37.01(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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