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.
TWIN RING UNION - 51981010068 suitable for MAN D-engines
Precise Fit for Your RequirementsDiscover the Twin ring union with the comparison number 51981010068, which is ideally suited to reliably support your engines. This product in the category Fittings and armatures meets the highest demands of the spare parts market and aims to provide effective solutions specifically for diesel and gas engines.OEM Spare Parts for the Highest StandardsThe Twin ring union, compatible with MAN D engines, impresses with its stability and durability. Weighing only 0.02 kg, this OEM spare part contributes significantly to the efficiency of your engines and facilitates integration into existing systems.
TWIN RING UNION - 51981010066 suitable for MAN D-engines
Precise Components for Your ApplicationsDiscover our product: the premium twin ring union with the comparison number 51981010066. This OEM spare part impresses with its accurate fit and excellent material quality. The twin ring union is ideal for professional applications in stationary and marine engines. With a lightweight of only 0.02 kg, you are well-prepared for high-performance decisions in engine technology.Reliable Quality Through Precise ManufacturingExperience complete confidence in your technology with OEM spare parts that are precisely designed for MAN D engines. The comparison number 51981010066 offers you the assurance that you are acquiring a very specific part. Our premium products minimize downtime and keep your engines in top condition.
RING UNION - 51981010063 suitable for MAN D-engines
Effective Ring Union for Your NeedsDiscover the product, the Ring Union with the comparison number 51981010063. This OEM replacement part offers you maximum quality and reliability in your operation. The Ring Union weighs only 0.05 kg and is specifically designed to provide the performance you need as a B2B customer.
TWIN RING UNION - 51981010061 suitable for MAN D-engines
TWIN RING UNION with the comparison number 51981010061 suitable for MAN D-engines
TWIN RING UNION - 51981010059 suitable for MAN D-engines
Precise Quality for Your EnginesThe twin ring union with the comparison number 51981010059 is a crucial product in the area of fittings and armatures, ideally suited for demanding applications in the engine sector. With a weight of only 0.006 kg, this OEM replacement part offers a perfect combination of lightness and robustness that makes installation efficient and simple.
TWIN RING UNION - 51981010058 suitable for MAN D-engines
Robust Twin Ring Union with Comparison Number 51981010058Discover our proven product, the Twin Ring Union with the comparison number 51981010058. This OEM spare part ensures precision and quality for engines in the marine and stationary fields. The Twin Ring Union is an essential fitting and armature element that is ideal for demanding applications.
TWIN RING UNION - 51981010057 suitable for MAN D-engines
Excellent OEM Replacement Part for EnginesDiscover the premium Twin ring union, comparison number 51981010057, an essential OEM replacement part suitable for MAN D engines. This replacement part offers the highest quality, aligned with strict standards. Rely on the reliability and durability that these OEM replacement parts provide.
TWIN RING UNION - 51981010056 suitable for MAN D-engines
Better Understanding of the Product: Twin Ring UnionDiscover the Twin Ring Union – an essential OEM spare part suitable for MAN D engines. With the reference number 51981010056, this product not only ensures strict compatibility but also supports the efficiency of your equipment. Thanks to its precise fit, the Twin Ring Union can be easily integrated into your existing systems.Relevant Information on Manufacturers and EnginesThe OEM spare part, suitable for MAN D, is specifically designed for applications in marine and stationary engine technology. With a weight of only 0.01 kg, the Twin Ring Union remains manageable and easy to install, making it ideal for various applications.
TWIN RING UNION - 51981010055 suitable for MAN D-engines
Precise Product: Twin Ring UnionDiscover our product, the Twin Ring Union with the comparison number 51981010055. This OEM spare part is specially designed to meet the demands of sophisticated applications such as marine and stationary engines. The Twin Ring Union impresses with its excellent fit and functionality.Suitable for MAN D EnginesThe spare part is compatible with MAN D engines and ensures that your drive system is equipped with the best technology. The top-notch design ensures that the Twin Ring Union delivers reliable performance and operates your machines efficiently. Rely on this product to gain advantages for your applications in the industrial or maritime sector.
TWIN RING UNION - 51981010054 suitable for MAN D-engines
Trust the comparison number 51981010054 The Twin ring union with the comparison number 51981010054 is an essential spare part that sets high standards in engine technology. This precisely manufactured item impresses with optimal fit and is easily installed weighing only 0.05 kg. By using OEM spare parts, you ensure quality and durability.
TWIN RING UNION - 51981010053 suitable for MAN D-engines
Robust Product for Engine SolutionsDiscover the advanced OEM replacement part in the form of the twin ring union, which impresses with precision and high manufacturing quality. With the comparison number 51981010053, this product ensures optimal performance and compatibility with your application.Suitable for MAN D EnginesThe twin ring union is approved for MAN D engines and meets the specific requirements of these engines. Weighing only 0.02 kg, this OEM replacement part is not only lightweight but also effective in its functionality.
TWIN RING UNION - 51981010052 suitable for MAN D-engines
Satisfying solution: Twin ring union for enginesDiscover our twin ring union with the comparison number 51981010052, an indispensable product for optimizing your engine operation. The twin ring union belongs to the category Fittings and armatures. Lean and efficient, it is suitable for MAN D engines and offers top-notch fit with a weight of only 0.03 kg.
RING UNION - 51981010051 suitable for MAN D-engines
Premium Ring Union for High-Performance EnginesDiscover our reliable spare part, the Ring Union with the comparison number 51981010051. This product impresses with its precise processing and enables optimal function in your engines. Each Ring Union has been developed to meet the highest demands and offers first-class performance.Comparison Number 51981010051 - Excellent QualityThe comparison number 51981010051 identifies this specific spare part suitable for MAN D engines, making it easy to select. The lightweight of only 0.06 kg additionally contributes to your efficiency, whether in marine or stationary applications. Trust our OEM spare parts, which meet original equipment manufacturer quality standards.
TWIN RING UNION - 51981010050 suitable for MAN D-engines
Twin ring union: Reliability for Your Engines Discover our twin ring union with the comparison number 51981010050, an essential product for anyone who relies on high-quality fittings and armatures. It is suitable for MAN D engines and impresses with high reliability and performance efficiency in a variety of applications. Weighing only 0.034 kg, this twin ring union is compact and optimized for different uses.Precise Fit for Engines The OEM replacement part ensures massive precision in combination with MAN D engines. The high-quality craftsmanship of the twin ring union enables smooth operation, allowing your engines to continuously deliver their optimal performance. Rely on the quality of OEM replacement parts to efficiently meet the requirements of your machines.
TWIN RING UNION - 51981010049 suitable for MAN D-engines
Sophisticated Twin Ring Union for True ProfessionalsDiscover our product, the twin ring union with the comparison number 51981010049. This OEM replacement part is a critical component for your applications in the field of diesel and gas engines. Thanks to its top-notch craftsmanship, it offers durable efficiency and easy handling during installation.
TWIN RING UNION - 51981010047 suitable for MAN D-engines
High-Quality Twin Ring UnionDiscover the twin ring union with comparison number 51981010047, specifically designed to offer outstanding quality for your applications. This twin ring union is an essential OEM replacement part that provides a precise fit. Weighing only 0.03 kg, it is easy to install and enhances the efficiency of your projects.
TWIN RING UNION - 51981010046 suitable for MAN D-engines
Efficient Twin Ring Union for Your ApplicationsOur twin ring union with the comparison number 51981010046 is an essential OEM replacement part that offers you the highest quality. This product is suitable for MAN D engines and enables an efficient connection that ensures smooth operation. Weighing only 0.04 kg, this twin ring union is easy to install and provides remarkable robustness, ensuring long-term reliability.
TWIN RING UNION - 51981010037 suitable for MAN D-engines
Precise Solution with Comparison Number 51981010037Discover the Twin ring union with the comparison number 51981010037. This product offers a tailored solution for your versatile needs in engine technology. The Twin ring union is a fundamental OEM spare part that optimally complements your systems. For remarkable efficiency and longevity, this is an indispensable element.
TWIN RING UNION - 51981010032 suitable for MAN D-engines
Twin Ring Union: Perfect Performance for Your EnginesDiscover the Twin Ring Union with the comparison number 51981010032, an essential product in the world of engines. This compact fittings and armatures item weighs only 0.24 kg and is ideally suited for demanding applications. Experience this valuable OEM replacement part that supports smooth operation.Suitable for MAN D EnginesThis excellent OEM replacement part is suitable for MAN D engines and has been precisely designed to efficiently support your machinery. The quality of the twin ring union allows for a reliable connection and meets the critical demands of your engines. Trust in proven components that enhance the performance of your equipment.
TWIN RING UNION - 51981010031 suitable for MAN D-engines
Spare Part for Efficient Engine PerformanceDiscover our product, the Twin ring union (comparison number: 51981010031), an essential component that belongs to the category of fittings and armatures. This OEM spare part is exceptionally suited for demanding applications and performs well in efficient engines.Suitable for MAN D EnginesThis Twin ring union is specifically suitable for MAN D engines and offers a perfect fit that contributes to the reliability and durability of your machines. Weighing only 0.033 kg, the spare part is both lightweight and strong enough for use in harsh environments.
RING UNION - 51981010025 suitable for MAN D-engines
Robust Solution for Your Motor NeedsDiscover the spare part, the Ring Union with the comparison number 51981010025. This product is an essential fitting and armature part, designed to fit MAN D engines perfectly. Weighing only 0.005 kg, the Ring Union combines strength and lightness, meeting the requirements of demanding engine technology.
RING UNION - 51981010021 suitable for MAN D-engines
Efficient Spare Part: Ring Union suitable for MAN DDiscover the Ring Union with the comparison number 51981010021, an essential product for your requirements in the engine sector. This spare part is ideally designed for applications with sophisticated fittings and armatures. It ensures that your suitable for MAN D engines always function optimally. The comparison number 51981010021 speaks volumes about the fit and efficiency of the OEM spare part.Lightweight and Durable ConstructionWeighing only 0.05 kg, the Ring Union offers an ideal combination of lightness and resilience. The OEM spare part has been developed for demanding conditions in marine and stationary applications. It plays a crucial role in promoting the longevity of your engines. Rely on the quality that stands behind each of our products.
RING UNION - 51981010010 suitable for MAN D-engines
Consider Our Product: Ring UnionDiscover our ring union with the comparison number 51981010010, specially designed for efficient use in engines. This ring union belongs to the category of fittings and armatures and is an essential component that every professional equipment set needs.Top Quality from the Category of OEM Replacement PartsAt MOPA Motorparts, you will receive first-class OEM replacement parts that are tailored to the highest demands! The ring union is a product that stands out for its quality. Our range not only includes products suitable for MAN D engines but also for other significant manufacturers like MWM, Mercedes-Benz, Deutz, Volvo, MTU, Bosch, and Detroit Diesel.
TWIN RING UNION - 51981010008 suitable for MAN D-engines
Product Description: Twin Ring Union as an Alternative Spare PartDiscover our Twin Ring Union, the essential OEM spare part listed under the comparison number 51981010008. This product falls into the category of Fittings and Armatures and offers a precise fit for various applications in engines. Meeting the highest quality standards, this Twin Ring Union fulfills the requirements of the most demanding operating conditions.
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.