Fittings – connection components for engines & systems
Fittings are essential elements in engine systems, industrial machinery and marine environments. As mechanical connection points, they ensure tight, durable and vibration-resistant links between components. Whether you're dealing with marine fittings for boats or engine fittings for industrial motors, high-quality fittings are critical for maintaining operational safety and performance.
RING UNION - 51981030001 suitable for MAN D-engines
Ring Union – Your Solution for Engine NeedsDiscover the ring union with the comparison number 51981030001, a functional product specifically designed to fit MAN D engines. This OEM replacement part belongs to the category of fittings and armatures. Weighing only 0.08 kg, this ring union offers a compact design that ensures durability and functionality.Precision and Quality through OEM Replacement PartsThis ring union is a component suitable for MAN D engines. The precise manufacturing follows strict OEM specifications, ensuring an optimal fit and maximum performance. Rely on the fact that each OEM replacement part meets the high standards required by professionals in the industry.
RING UNION - 51981016004 suitable for MAN D-engines
Ring Union with Comparison Number 51981016004Discover our Ring Union with the comparison number 51981016004. This product is an indispensable component for efficient diesel and gas engines, suitable for MAN D engines. The Ring Union belongs to the category of Fittings and Armatures and brings a weight of only 0.17 kg, ensuring ease of installation.Quality and Reliability for Demanding ApplicationsAt MOPA Motorparts, we exclusively offer OEM spare parts, which include our Ring Union. These spare parts meet high standards for durability and perform even under the most challenging conditions. Rely on the effectiveness of these components, suitable for MAN D engines.
RING UNION - 51981015008 suitable for MAN D-engines
OEM Replacement Part – Ring Union for ApplicationsDiscover our suitable ring union, designed as an OEM replacement part specifically for MAN D engines. With the reference number 51981015008, this product impresses with its solid quality and functionality. Unlike aftermarket products, our OEM replacement parts offer optimal processing and reliability, providing you with the necessary assurance for your applications.Rely on Proven QualityThe ring union weighs only 0.033 kg and meets the highest quality standards. As this product is designed precisely for MAN D engines, you benefit from a precise fit, supported by our many years of experience in providing suitable replacement parts. Always opt for OEM replacement parts to maintain the integrity of your systems.
TWIN RING UNION - 51981015007 suitable for MAN D-engines
Robust Twin Ring Union – Your Solution for Marine ApplicationsDiscover the Twin Ring Union with the comparison number 51981015007, an essential OEM spare part for your requirements. This item belongs to the category of Fittings and Armatures and is particularly suitable for various applications in marine and stationary use.Perfect Fit for MAN D EnginesOur Twin Ring Union is compatible with MAN D engines and features a robust construction that can be used in challenging environments. Weighing only 0.032 kg, this OEM spare part is both lightweight and functional, allowing it to integrate perfectly into your current engine infrastructure.
TWIN RING UNION - 51981015004 suitable for MAN D-engines
Premium Twin Ring Union – Ideal for Your ApplicationDiscover our specialized product, the twin ring union with the comparison number 51981015004. This OEM spare part belongs to the category of fittings and armatures and is particularly suitable for various applications in the industrial and marine sectors. It meets the highest standards and ensures that you can maximize the efficiency of your machines.Efficient Components for MAN D EnginesThe twin ring union is compatible with MAN D engines and offers you the opportunity to elevate the performance of your machines to a new level. Weighing only 0.022 kg, the twin ring union combines lightweight handling with robust quality. Rely on our OEM spare parts to extend the lifespan of your engines.
TWIN RING UNION - 51981015003 suitable for MAN D-engines
Optimal Performance with Comparison Number 51981015003 Discover the Twin ring union with comparison number 51981015003, a high-quality OEM replacement part designed to support the effective functioning of engines. Weighing only 0.025 kg, this component is suitable for MAN D engines and is an essential element that optimizes your engine performance and increases efficiency.Features of the Twin Ring Union As part of the product group Fittings and armatures, the Twin ring union represents quality and reliability. This product ensures that engines operate smoothly. Thanks to its precise manufacturing, it meets the high demands of engines in marine and stationary applications.
TWIN RING UNION - 51981015002 suitable for MAN D-engines
Reliable Twin Ring Union for Your Engine SystemExperience the reliable product, the Twin Ring Union, with the comparison number 51981015002. This OEM replacement part offers optimal performance and meets the requirements for various industrial applications. Suitable for MAN D engines, this component ensures the necessary excellence and durability to operate machinery efficiently.Quality through OEM Replacement PartsOpt for this powerful product, which provides the highest level of fit through OEM replacement parts. The Twin Ring Union is perfectly suited for MAN D engines to keep them reliably operational. Trust our products to maintain your engine in excellent condition.
TWIN RING UNION - 51981012054 suitable for MAN D-engines
Durable Twin Ring UnionDiscover our OEM spare part, the Twin Ring Union (comparison number: 51981012054). This product offers you the precision and durability you need to ensure the efficiency of your engines.Optimum Fit: SUITABLE FOR MAN DThe Twin Ring Union is designed to be suitable for MAN D engines, enabling seamless integration. Rely on our OEM spare parts that meet all industry requirements. With our comparison number 51981012054, you can quickly and easily find the right part.
TWIN RING UNION - 51981012034 suitable for MAN D-engines
Quality Product for EnginesDiscover our Twin ring union replacement part with the comparison number 51981012034, an essential component specifically designed for MAN D engines. This OEM replacement part ensures excellent performance and reliability in various applications, particularly in the marine and stationary sectors.Lightweight and FunctionalThe Twin ring union weighs only 0.01 kg, allowing for easy handling and installation. With this specifically designed replacement part, your engines can function optimally, as it is precisely tailored to the requirements of for MAN D.
TWIN RING UNION - 51981012006 suitable for MAN D-engines
Your Twin Ring Union for Optimal Engine PerformanceDiscover the Twin Ring Union, an extremely important product specifically designed to support your MAN D engines. With the comparison number 51981012006, this OEM spare part is your ideal solution for reliable engine performance under demanding conditions. Whether in marine or stationary use – this Twin Ring Union ensures the highest quality and fit for your requirements.
TWIN RING UNION - 51981010093 suitable for MAN D-engines
Reliable Solution for Your Engines Discover the robust twin ring union, comparison number 51981010093. This product is ideal for meeting the demands of engines and offers a high level of precision and reliability in application.
TWIN RING UNION - 51981010092 suitable for MAN D-engines
Versatile Product: Twin Ring UnionDiscover the versatile twin ring union, part number 51981010092. This robust OEM replacement part belongs to the category Fittings and Armatures and ensures that your engines operate at their best. It is the perfect component suitable for MAN D engines, promoting the longevity and efficiency of your equipment.
TWIN RING UNION - 51981010089 suitable for MAN D-engines
Reliable Twin Ring Union of OEM QualityDiscover the Twin Ring Union (comparison number: 51981010089), an excellent OEM replacement part specifically designed for the diverse demands in marine and stationary applications. This important component is optimally selected to promote the operational reliability of your systems.Suitable for MAN D EnginesThis replacement part is suitable for MAN D engines and ensures an excellent fit. The Twin Ring Union weighs only 0.041 kg and is designed for efficiency and robustness. Through precise workmanship, seamless functionality is ensured, meeting the stringent requirements of the marine sector.
TWIN RING UNION - 51981010088 suitable for MAN D-engines
Twin Ring Union with Comparison Number 51981010088Discover our Twin Ring Union, an essential OEM spare part with the comparison number 51981010088, suitable for MAN D engines. This product belongs to the category Fittings and Armatures and is characterized by first-class workmanship. Every detail meets specific requirements to provide high performance.Spare Parts in Original Equipment Manufacturer QualityOur Twin Ring Union meets the stringent standards of OEM spare parts that you need to keep your engines reliably in operation. Trust our over 25 years of experience in providing spare parts that are optimally suited.
TWIN RING UNION - 51981010086 suitable for MAN D-engines
Twin Ring Union: Your Reliable Fitting ProductDiscover the Twin Ring Union (part number: 51981010086), an essential product specifically designed for use in engines. This OEM replacement part offers the best fit and functionality, making it ideal for long-lasting applications.
TWIN RING UNION - 51981010084 suitable for MAN D-engines
Efficient Solution: Twin Ring Union for MAN D EnginesThe twin ring union, comparison number 51981010084, is a crucial product used in both marine and stationary applications. With this OEM replacement part, you ensure the optimal functionality of your engines. This fitting provides a long-lasting and secure connection that is essential for the efficiency of your system.Premium Material: Perfect Fit for MAN D EnginesThis OEM replacement part is designed specifically for MAN D engines and meets the highest standards of quality and precision. With a lightweight of 0.04 kg, the twin ring union can be easily integrated and installed. You can rely on the reliability of this fitting to support and optimize the performance of your engines.
TWIN RING UNION - 51981010083 suitable for MAN D-engines
Diverse Product Group: Fittings and ArmaturesDiscover the Twin ring union (comparison number: 51981010083), an important spare part for your engine technology. This product belongs to the product group of fittings and armatures and offers maximum reliability. The Twin ring union is a critical component suitable for MAN D engines and ensures an effective connection in your engine system.Efficient Connection for MAN D EnginesThis spare part is suitable for MAN D engines and provides a stable connection in your engine system. Weighing only 0.07 kg, the Twin ring union is lightweight and easy to install without compromising on robustness. This aspect is crucial for the powerful operation of your engines.
TWIN RING UNION - 51981010079 suitable for MAN D-engines
TWIN RING UNION with the comparison number 51981010079 suitable for MAN D-engines
TWIN RING UNION - 51981010078 suitable for MAN D-engines
Functional Product: Twin Ring Union Comparison Number 51981010078Discover our Twin Ring Union with the comparison number 51981010078. This powerful component weighs only 0.02 kg, meeting the efficiency and performance requirements essential for diesel and gas engines.OEM Replacement Parts for Maximum PrecisionOur Twin Ring Union is an OEM replacement part that impresses with its excellent manufacturing quality compared to aftermarket parts. At MOPA Motorparts, we focus on products specifically designed to meet recognized standards and comprehensively support the performance of your engines.
TWIN RING UNION - 51981010077 suitable for MAN D-engines
Product Details: Twin Ring Union in FocusDiscover the twin ring union with the comparison number 51981010077, an essential OEM spare part for your engines in marine and stationary applications. This product impresses with its thoughtful design and offers you the highest quality for cost-efficient maintenance and repair. Weighing 0.037 kg and measuring 4.8 cm in length and width and 1.6 cm in height, this twin ring union is ideally suited for various applications.
TWIN RING UNION - 51981010075 suitable for MAN D-engines
Twin Ring Union: Precise Components for High-Performance EnginesThe twin ring union with the comparison number 51981010075 is an exquisite replacement part found in the category of fittings and armatures. This product is specifically designed and suitable for MAN D engines. Weighing only 0.04 kg, this OEM replacement part combines lightness with solidity and meets the highest standards of the manufacturers.
TWIN RING UNION - 51981010071 suitable for MAN D-engines
Detailed Product Description of the Twin Ring Union Discover our premium product, the Twin Ring Union, with comparison number 51981010071. This precisely manufactured fitting item from the category Fittings and armatures impresses with reliable performance and optimal fit in the field of industrial applications.Suitable for MAN D Engines This Twin Ring Union is compatible with various engines, suitable for MAN D. With a lightweight of only 0.02 kg, handling and installation are particularly easy. Rely on our OEM spare parts that meet the specific requirements of the industry.
TWIN RING UNION - 51981010070 suitable for MAN D-engines
Twin Ring Union with Quick AdjustmentDiscover the twin ring union with comparison number 51981010070, an essential component from our fittings and armatures collection. This twin ring union has been specifically designed to meet the requirements of engines, suitable for MAN D engines. With compact dimensions of 6 cm in length and width, and 2.1 cm in height, this product provides a perfect fit and functionality for your applications in marine and stationary fields.
TWIN RING UNION - 51981010069 suitable for MAN D-engines
Versatile Use: Twin Ring UnionThe twin ring union with the comparison number 51981010069 is an essential product for your engines. This OEM replacement part impresses with its precise craftsmanship and is designed to meet the requirements of MAN D engines. With compact dimensions of 6.5 cm in length and width and only 2 cm in height, this replacement part is an ideal companion for various applications.Product Details: Quality and FunctionalityThis OEM replacement part weighs only 0.065 kg and belongs to an outstanding weight class. Thanks to the robustness of its material composition, the twin ring union is not only functional but also durable. Designed to promote reliability in marine and stationary applications, this product contributes to the efficiency of your systems.
Function and benefits
Fittings serve as interfaces between hoses, pipes, housings and mechanical units. In engine systems, reliable engine fittings guarantee that fluids, gases and mechanical forces are securely transferred. Typical benefits of using precision-engineered fittings include:
- Secure and leak-free connections even under high pressure
- Resistance to corrosion, vibration and thermal stress
- Compatibility with various systems – from engines to pumps and cooling circuits
In marine environments, fittings must additionally withstand saltwater exposure and continuous load changes, making marine fittings a category of their own in terms of robustness and reliability.
Types and applications of engine and marine fittings
The category of fittings includes threaded connectors, quick couplings, hose connectors, elbows and T-pieces. Depending on the application, these are used in fuel systems, lubrication circuits, hydraulic control systems or exhaust units. In marine settings, boat fittings must also meet international safety and classification standards.
Engine fittings are commonly integrated in high-load environments such as diesel engines, gas turbines and power units. These fittings must be both dimensionally precise and material-optimized to support system pressure and dynamic loads.
Materials and design features
Fittings are typically made from stainless steel, brass, aluminum or composite materials. In some cases, coatings are applied to improve resistance to corrosion or abrasion. Boat fittings, in particular, are often anodized or sealed for protection against marine conditions.
Advanced design features such as O-ring grooves, reinforced walls or vibration dampers improve the safety and lifespan of engine fittings. Depending on the system, fittings may also be part of quick-connect modules or modular armature systems used in motors and armatures.
Replacement and availability
Over time, fittings can become worn or corroded, especially in aggressive environments or under constant pressure. For safety-critical systems such as marine engines, timely replacement is crucial. We supply a broad range of fittings suitable for MTU, Deutz, MAN, Volvo Penta, and MWM engine types.
Whether you're working with engine fittings, boat fittings or components related to motors and armatures, our warehouse ensures fast availability and OEM-level compatibility. Each engine armature or connection unit is carefully selected for durability and ease of installation.
Questions and answers
What is fittings?
Fittings are mechanical components used to connect pipes, hoses or structural elements in engines, industrial systems and marine applications. They are designed to ensure tight, secure and durable connections and are available in many shapes, sizes and materials.
How do fittings work?
Fittings work by mechanically joining two components, often using threads, clamps or pressure seals. In engines and motors, engine fittings maintain the integrity of fluid and air systems, while in boats and ships, marine fittings are essential for safe and corrosion-resistant connections. In the context of motor armatures, fittings help align and stabilize moving parts within dynamic systems.