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.
Choose from following:
HEXAGON NUT - 81906850092 suitable for MAN D engines
Hexagon nut suitable for MAN D enginesDiscover our top-quality spare part, the hexagon nut with the comparison number 81906850092. This product is essential for your applications in marine and stationary engines as well as in locomotives. Weighing only 0.01 kg, the hexagon nut impresses with user-friendly handling and reliability.Quality you can rely onThe hexagon nut is suitable for MAN D engines and meets the strict quality standards of the manufacturers. Trust our OEM spare parts, which stand for excellent performance and lasting durability. This product ensures that your engines always operate efficiently.
HEX LOCK NUT - 81906850086 suitable for MAN D engines
Robust Hex Collar Lock Nut for Your EnginesDiscover the hex collar lock nut with part number 81906850086, which represents an excellent solution for your engines. This product, suitable for MAN D engines, ensures a secure connection that is essential for the reliable operation of your machinery. Weighing only 0.03 kg, this nut offers an ideal combination of easy handling and stable fastening.
HEXAGON NUT - 81906850082 suitable for MAN D engines
Hexagon Nut for Precise ApplicationsDiscover the Hexagon nut with the comparison number 81906850082, an essential product specifically designed for use in engines. This OEM replacement part is the ideal companion for maintenance and repair work, impressing with its excellent quality. It ensures a reliable connection that is vital for the durability of MAN D engines.
ACORN NUT - 81906850081 suitable for MAN D engines
Precise Acorn Nut – Reference Number 81906850081Discover the Acorn nut with the reference number 81906850081, which offers you high quality and reliability. This product belongs to the category of Nuts and is a key component for the maintenance of your engines. Ideal for numerous applications, the Acorn nut impresses with its excellent fit, which is crucial for efficiently running systems.OEM Spare Parts Suitable for MAN D EnginesThe Acorn nut is an OEM spare part specifically designed for MAN D engines. This ensures you can rely on proven quality and durability. The use of OEM spare parts ensures optimal functionality and keeps your engines in top condition, even under demanding conditions.
HEXAGON NUT - 81906850075 suitable for MAN D engines
Precise Hexagon Nut for Your ApplicationsDiscover the hexagon nut with the comparison number 81906850075, suitable for MAN D engines. This OEM replacement part ensures a stable connection and is an essential component for your engines. Weighing only 0.072 kg, this hexagon nut offers the strength and reliability required in marine and stationary applications.Reliable Replacement Parts for Your EnginesOur hexagon nut belongs to the group of nuts and is compatible with MAN D engines. Every OEM replacement part in our range meets the highest quality standards and provides you with safety in use. Rely on the proven performance that our products offer to ensure the efficiency of your engines.
ACORN NUT - 81906850074 suitable for MAN D engines
Robust Acorn Nut for Efficient EnginesDiscover our Acorn nut, an essential OEM spare part (reference number: 81906850074), designed specifically for MAN D engines. This durable product belongs to the group of Nuts and ensures a perfect connection of components. Weighing 0.325 kg, it impresses with its stability and is designed to meet the demands of modern engines.Perfect Fit and QualityThe Acorn nut is suitable for MAN D and offers the OEM quality you need when working on your engines. This reliable connection helps maximize the efficiency of your engines, allowing you to depend on the performance of your equipment. Our OEM spare parts are specifically tailored to meet the requirements of manufacturers like MWM, Mercedes-Benz, Deutz, and Volvo.
HEX LOCK NUT - 81906850062 suitable for MAN D engines
Hex Collar Lock Nut for Your Engine SolutionsDiscover the Hex collar lock nut with the comparison number 81906850062, ideal for securing the functionality of your engines. This product belongs to the category of Nuts and is specifically designed to fit MAN D engines. Weighing only 0.03 kg, it combines lightness with robustness, making it perfect for use in demanding marine and stationary applications.
HEXAGON NUT - 81906850060 suitable for MAN D engines
Robust Hexagon Nut for Efficient ApplicationsThe hexagon nut with the comparative number 81906850060 is an indispensable OEM spare part designed for MAN D engines. Weighing 0.25 kg, this product offers the perfect combination of functionality and durability. In the category of nuts, it is an important component for any professional application.Quality and OEM ComparisonThis hexagon nut impresses with its longevity and reliability. Suitable for MAN D engines, the products from MOPA Motorparts ensure that your machines operate optimally. We offer you OEM quality at an attractive price, so you can obtain the best solutions for your engines.
HEX LOCK NUT - 81906850058 suitable for MAN D engines
Quality and Precision of the Hex Collar Lock NutDiscover our Hex collar lock nut with the comparison number 81906850058, designed for MAN D engines. This nut belongs to the group of Nuts, which is essential for the reliability of your engine applications. Weighing only 0.03 kg, it offers the ideal combination of lightweight and stability.Suitable for MAN D EnginesThe OEM replacement part is specifically designed to provide the highest precision and fit. Our Hex collar lock nut is suitable for MAN D engines and ensures optimal performance for your diesel or gas engine. Rely on OEM replacement parts that give you the confidence you need for the operation of your machines.
HEX LOCK NUT - 81906850057 suitable for MAN D engines
Hex collar lock nut with comparison number 81906850057Discover the hex collar lock nut with the comparison number 81906850057 – a crucial OEM spare part specifically designed for use in engines. This hex collar lock nut weighs only 0.02 kg and impresses with its high stability and durability.Suitable for MAN D enginesThis product is suitable for MAN D engines and helps you operate your machinery efficiently. The hex collar lock nut has been manufactured under strict quality standards and meets the requirements for reliable OEM spare parts. Rely on a product that assists you in demanding operational conditions.
ACORN NUT - 81906850038 suitable for MAN D engines
Precise OEM Replacement Part for MAN D EnginesDiscover our acorn nut product, which is marked with the reference number 81906850038 and specifically designed to meet the requirements of engines. This acorn nut is an essential part, suitable for MAN D engines, and impresses with its outstanding quality and fit in demanding application scenarios.Features of the Acorn Nut and Its SignificanceWeighing only 0.018 kg, the acorn nut is extremely durable despite its lightweight nature. As an OEM replacement part, it offers excellent functionality for engines. Quality is crucial when selecting components, and this product delivers the reliability you are looking for. The reference number 81906850038 allows for easy identification and procurement of this specific replacement part.
KNURLED NUT - 81906800017 suitable for MAN D engines
Excellent Knurled Nut for Your EnginesGet to know the knurled nut with the reference number 81906800017, which has been developed as an OEM spare part. This product impresses with its precise fit and high quality, ideal for maintaining your engines. Weighing only 0.005 kg, this knurled nut offers the perfect balance between lightness and robustness to support the performance of your machines.Optimal Fit for MAN DThe knurled nut is suitable for MAN D engines and belongs to the group of nuts. As an OEM spare part, it provides the security and reliability that are crucial for sustainable engine maintenance. Rely on this product to ensure the functionality of your engines and minimize potential downtime.
KNURLED NUT - 81906800015 suitable for MAN D engines
Robust Knurled Nut for Your ApplicationsDiscover the knurled nut with the comparison number 81906800015, a top-quality OEM replacement part that provides a reliable solution for maintaining your engines. These nuts impress with their excellent workmanship and are specifically designed to support the performance of engines. Weighing just 0.04 kg, we focus on high efficiency and functionality.Suitable for MAN D EnginesThe knurled nut is suitable for MAN D engines and integrates seamlessly into your existing system. Thanks to the demanding manufacturing process, this product meets the high standards of the industry. Trust in the OEM replacement parts from MOPA Motorparts to ensure optimal performance of your engines.
KNURLED NUT - 81906800014 suitable for MAN D engines
Precise Knurled Nut for MAN D EnginesDiscover our Knurled Nut, a high-quality OEM replacement part with the reference number 81906800014. Weighing only 0.001 kg, this nut is an essential product suitable for MAN D engines. It ensures that your engines operate reliably in marine and stationary applications as well as in locomotives. Trust in a component that meets the high standards of the engine industry.Easy Installation and High ReliabilityOur Knurled Nut is an OEM replacement part characterized by its excellent fit. Suitable for MAN D engines, it allows for easy assembly and ensures smooth operation of your equipment. By using top-quality materials, we offer you a product that is durable and functional, ensuring your engines always perform optimally.
KNURLED NUT - 81906800012 suitable for MAN D engines
Precise Product: Knurled Nut compatible with MAN D EnginesDiscover the knurled nut with the comparison number 81906800012, an essential OEM spare part from the category of nuts. This product is specifically designed to fit MAN D engines and impresses with an excellent fit that ensures optimal functionality. Weighing only 0.009 kg, this knurled nut is robust enough to withstand the demanding conditions in diesel and gas engines in marine and stationary use.Benefits of OEM Spare Parts: Quality You Can Rely OnCompared to aftermarket parts, our OEM spare parts, such as the knurled nut, offer significant advantages. The comparison number 81906800012 stands for the reliable origin of the product, so you can be sure that it harmonizes perfectly with your engines. Trust OEM to enhance the longevity and efficiency of your machines.
KNURLED NUT - 81906800011 suitable for MAN D engines
Knurled nut with comparison number 81906800011Discover the knurled nut with comparison number 81906800011, a top-notch product suitable for MAN D engines. This precisely manufactured knurled nut belongs to the category of nuts and impresses with its lightweight design of only 0.006 kg, making it ideal for various engines in marine and stationary applications.Suitable for MAN D: Quality that convincesAs an OEM replacement part, the knurled nut with comparison number 81906800011 is well-suited to meet the demands of challenging applications. It has been specifically designed for MAN D engines and is an indispensable component in engine maintenance. At MOPA Motorparts, you will find over 1 million replacement parts in our range, including this essential knurled nut.
KNURLED NUT - 81906800010 suitable for MAN D engines
Precise Replacement Part: Knurled Nut 81906800010The knurled nut with the comparison number 81906800010 is an OEM replacement part specifically designed for MAN D engines. This precisely manufactured knurled nut ensures optimal functionality and plays a crucial role in the performance of your engines.Functionality and FeaturesThis OEM replacement part, suitable for MAN D, belongs to the category of nuts and weighs only 0.002 kg. Its compact design allows for easy installation and longevity in demanding applications. Rely on the precision that only OEM replacement parts can provide.
KNURLED NUT - 81906800009 suitable for MAN D engines
Robust Knurled Nut for Your EnginesThe knurled nut with the comparison number 81906800009 is a reliable OEM replacement part specifically designed to function optimally in engines. This product belongs to the "Nuts" category and offers the quality you would expect from a manufacturer. Weighing only 0.04 kg, the knurled nut is not only lightweight but also well-suited for a variety of applications.
ACORN NUT - 81906720044 suitable for MAN D engines
Robust Acorn Nut Suitable for MAN D EnginesDiscover our Acorn Nut with the comparison number 81906720044, a top-quality OEM replacement part that offers you the highest quality for your engines. This Acorn Nut is specifically designed to function optimally in applications with MAN D engines and provides durable performance.Reliability and FitThe Acorn Nut from our product group Nuts is suitable for MAN D engines. As an OEM replacement part, it ensures that your engines operate efficiently. Rely on products known for their excellent fit and that fully meet your requirements in marine or stationary applications.
NOZZLE CAP NUT - 81906720041 suitable for MAN D engines
Nozzle cap nut with comparison number 81906720041 Discover the nozzle cap nut with the comparison number 81906720041, an essential OEM spare part. This nut is suitable for MAN D engines and ensures that you can maintain the performance and reliability of your machines. Weighing only 0.07 kg, it combines optimal functionality with a compact design.
HEX CAP NUT - 81906720034 suitable for MAN D engines
Premium Product: Hex Cap Nut 81906720034Discover the Hex cap nut with the comparison number 81906720034, specifically designed for MAN D engines. This part weighs only 0.01 kg and offers the perfect combination of stability and durability. The Hex cap nut ensures a reliable connection that is essential for the operation of your engines.
HEX CAP NUT - 81906720026 suitable for MAN D engines
Versatile Hex Cap Nut for EnginesDiscover the hex cap nut with the comparison number 81906720026, specifically designed for use in engines. This product is an essential component when it comes to securing a reliable connection during the assembly of engines. The hex cap nut is lightweight and robust, meeting the demands placed on MAN D engines.Quality through OEM Spare PartsThis OEM spare part offers top performance. Since the hex cap nut is suitable for MAN D engines, you can be confident that you are choosing a product that fits your engines optimally. The use of OEM spare parts ensures seamless integration and longevity of your systems.
HEX CAP NUT - 81906720019 suitable for MAN D engines
Robust Hex Cap Nut with Comparison Number 81906720019Discover the hex cap nut with comparison number 81906720019, specifically designed for reliable use in applications suitable for MAN D engines. This nut, part of the nuts product group, is an essential item for your operational processes. Weighing only 0.02 kg, this OEM replacement part integrates seamlessly into your existing engine configuration.Quality and Precision in OEM Replacement PartsThe hex cap nut is an OEM replacement part. This means you can expect the highest quality and precision. Each component has been manufactured according to strict guidelines to support the optimal performance of your engines suitable for MAN D. This nut is a reliable choice for marine and stationary applications that demand the highest standards.
HEX CAP NUT - 81906720008 suitable for MAN D engines
Robust Hex Cap Nut for Your ApplicationsDiscover the hex cap nut with the comparison number 81906720008, which is ideal for your engine requirements. This OEM spare part ensures a precise fit and is an essential element in the maintenance of your machines. The robust construction ensures that your engine runs optimally and that operations are not disrupted.Suitable for MAN D Engines: Quality That ImpressesThis spare part is suitable for MAN D engines and brings the reliability that you expect from OEM spare parts. Weighing only 0.012 kg, the hex cap nut is easy to handle and can be installed without any issues. It belongs to the group of nuts and is an exemplary product for applications in stationary as well as marine uses.
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.
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.