Locking parts – secure fastening for engines and machinery
Locking parts are essential for ensuring that fasteners and mechanical assemblies remain secure under load, vibration and thermal stress. In engines, turbines, marine systems and industrial equipment, locking parts prevent critical components from loosening during operation – a key factor for safety, durability and system integrity.
Choose from following:
PLUG - 3851975 suitable for Volvo/Volvo Penta engines
Reliable Plug suitable for Volvo/Volvo Penta enginesDiscover our reliable plug with the comparison number 3851975, which is excellently suited for your Volvo/Volvo Penta engines. This spare part belongs to the category of locking parts and ensures optimal functionality of your drive systems in marine and stationary applications.Precise quality for effective engine functionWeighing only 0.003 kg, this product, designed for use in Volvo/Volvo Penta engines, features an exceptionally robust construction. Our OEM spare parts, like the plug 3851975, offer effectiveness and technical reliability that exceed the standards of aftermarket alternatives.
PLUG - 3850999 suitable for Volvo/Volvo Penta engines
First-Class OEM Replacement Part for Optimal UseThe OEM replacement part with the comparison number 3850999 is a first-class plug, specifically designed for engines. In the category of locking parts, this product impresses with excellent craftsmanship and high functionality. Weighing only 0.032 kg, the plug is not only lightweight but also durable, making it particularly suitable for intensive operating conditions.Excellent Fit for EnginesThis product is compatible with Volvo/Volvo Penta engines and ensures optimal functionality. By using OEM replacement parts, you secure the highest quality, in contrast to aftermarket solutions that often only partially meet performance expectations. The plug helps you maximize the operational efficiency of your engines and significantly extend their lifespan.
PLUG - 3850802 suitable for Volvo/Volvo Penta engines
Plug for Efficient EnginesDiscover our plug, suitable for Volvo/Volvo Penta engines. With the comparison number 3850802, this OEM replacement part is exactly what you need to optimize the functionality of your machines. Quality and reliability are the top priorities of this product and form the basis for all our OEM replacement parts.Product Details: Comparison Number 3850802The plug with the comparison number 3850802 serves as an essential locking part and ensures that your equipment operates flawlessly. Weighing only 0.018 kg, it is particularly lightweight. This premium product is suitable for engines from renowned manufacturers, allowing for seamless integration into your existing systems.
PLUG - 3850740 suitable for Volvo/Volvo Penta engines
High-Quality Spare Part: PlugDiscover the plug with the comparison number 3850740, a top-quality OEM spare part designed specifically for use in various engines. This product is essential for all applications compatible with suitable for Volvo/Volvo Penta engines and optimizes their functionality. Weighing only 0.01 kg, the plug offers a perfect combination of robustness and functionality.
PLUG - 3850662 suitable for Volvo/Volvo Penta engines
Plug with Comparison Number 3850662The plug we offer is an important OEM spare part with the comparison number 3850662, specifically designed to ensure reliable functionality. This product is suitable for Volvo/Volvo Penta engines and belongs to the group of locking parts. The quality of the plug is ensured by OEM spare parts produced according to ÖNORM standards.
PLUG - 3848870 suitable for Volvo/Volvo Penta engines
Plug 3848870: Your Replacement Part for EnginesDiscover our product, the plug with the comparison number 3848870. This component is suitable for Volvo/Volvo Penta engines and belongs to the category of locking parts. Weighing 0.228 kg, this replacement part impresses with robust features and is ideal for technical applications.
PLUG - 3847669 suitable for Volvo/Volvo Penta engines
Essential Component Suitable for Volvo/Volvo PentaDiscover the plug under the comparison number 3847669. This item from the group of locking parts enables optimal functionality of your engines. The product stands out for its precise fit and reliability. It provides a secure interface for various applications that have proven themselves in the marine and stationary sectors.Perfect Fit for EnginesThe plug has a low weight of only 0.125 kg and is specifically designed to be compatible with Volvo/Volvo Penta engines. Protect the performance of your engines by using OEM spare parts that are suitable for these renowned manufacturers. These durable components contribute to your engine's efficiency and significantly improve its lifespan.
PLUG - 3843197 suitable for Volvo/Volvo Penta engines
Plug suitable for Volvo/Volvo Penta enginesThe plug with the reference number 3843197 is an OEM replacement part specifically designed for engines suitable for Volvo and Volvo Penta. With excellent quality and precise fit, it ensures that your engine operates efficiently and reliably. As part of our product line of OEM replacement parts, this component offers durability and the reliability you need for the maintenance of your engines.Quality as reinforcement for your engineBy using OEM replacement parts, such as the plug, you avoid the uncertainties that come with aftermarket products. The reference number 3843197 reflects the high manufacturing standards that only OEM replacement parts adhere to. Trust in the plug that is perfectly suited to the requirements of your engine.
PLUG - 3842396 suitable for Volvo/Volvo Penta engines
Excellent Plug for Your EngineDiscover our product: the plug with the comparison number 3842396, which has been ideally developed for your technical requirements. This essential locking part ensures a precise fit, as it is suitable for Volvo/Volvo Penta engines. Weighing only 0.028 kg, the plug is user-friendly and allows for quick assembly without much effort.OEM Replacement Parts for Your SafetyOur OEM replacement parts stand for quality and reliability. The plug with the comparison number 3842396 offers you the assurance of a perfect fit and high performance that you expect from a part designed to be suitable for Volvo/Volvo Penta engines. Rely on the precision with which every MOPA product is manufactured to ensure durable solutions for your engines.
PLUG - 3840748 suitable for Volvo/Volvo Penta engines
Plug with Comparison Number 3840748Discover the plug that carries a comparison number 3840748 and is suitable for Volvo/Volvo Penta engines. This product from the group of locking parts impresses with precise fit and attractive quality. As an OEM replacement part, it meets strict standards and provides safety and confidence in every application.Perfect Sizing for Optimal PerformanceWeighing only 0.23 kg, this product combines lightness with consistent performance. It is used to reliably keep various engines running, while it is suitable for Volvo/Volvo Penta. Our strong focus on precision ensures that you always choose the correctly sized solution for your specific needs.
PLUG - 3840434 suitable for Volvo/Volvo Penta engines
Excellent Product: Plug for Various EnginesDiscover our Plug, which is perfectly suited for Volvo/Volvo Penta engines. With the comparison number 3840434, this product offers reliable quality and precision. As part of the article group "Locking parts," it enables precise fitting in various engine applications, ensuring optimal functionality.
PLUG - 3840433 suitable for Volvo/Volvo Penta engines
Optimal Plug 3840433 – Your Solution for EnginesDiscover our plug with the comparison number 3840433, an essential OEM spare part that plays a crucial role in the functionality of your diesel and gas engines. This reliable product weighs just 0.005 kg and allows for effortless installation, benefiting every maintenance.
PLUG - 3838340 suitable for Volvo/Volvo Penta engines
Premium Plug – Range for EnginesDiscover our first-class product, the plug with the comparison number 3838340, suitable for Volvo/Volvo Penta engines. As an OEM replacement part, these locking parts represent the highest quality and are designed for the reliable operation of your engines. Weighing only 0.024 kg, this part combines lightness and robustness.Concise Details of the PlugThis plug is essential for the optimal supply of your diesel and gas engine. The comparison number 3838340 allows for easy identification of the replacement part, ensuring that all technical requirements for engines suitable for Volvo/Volvo Penta are met. Rely on our long-standing experience in the distribution of OEM replacement parts to maximize your engine's efficiency.
PLUG - 3836106 suitable for Volvo/Volvo Penta engines
Plug with Comparison Number 3836106 The plug with the comparison number 3836106 is an OEM replacement part specifically designed for use in engine applications. This product description highlights the features and benefits of the part. It is essential for the reliability and performance of your machine.Suitable Part for Volvo/Volvo Penta Engines Our product is suitable for Volvo/Volvo Penta engines and designed to maximize the performance of your machines. Weighing just 0.168 kg, this plug ensures optimal functionality. Thanks to the combination of robust material and precise manufacturing standards, this OEM replacement part is the ideal choice for demanding applications in the marine and stationary industry.
PLUG - 3825335 suitable for Volvo/Volvo Penta engines
Excellent OEM Spare Part for Best Engine Performance Discover our Plug (comparison number 3825335), an excellent OEM spare part. This product is suitable for Volvo/Volvo Penta engines and offers the exact fit you can expect from components. Weighing only 0.041 kg, the Plug ensures optimal functionality in your engine.
PLUG - 3819972186 suitable for MTU engines
Premium Plug for Engine OptimizationOur plug with the comparison number 3819972186 is the ideal OEM replacement part. It ensures optimal functionality and maximum efficiency for your engines. With this product, the performance of your machines is significantly enhanced.
PLUG - 3819970486 suitable for MTU engines
Modern Plug: Comparison Number 3819970486Discover our plug, which can be found under the comparison number 3819970486. This product is suitable for MTU engines and belongs to the category of locking parts. It enhances the performance and reliability of your engines used in marine and stationary applications.
PLUG - 3819272 suitable for Volvo/Volvo Penta engines
OEM Replacement Part Suitable for Volvo/Volvo PentaDiscover our plug, known by the reference number 3819272. This product is ideally suited for use in engines designed for Volvo/Volvo Penta. With a weight of only 0.022 kg, it provides the perfect solution for your operational application without adding extra complexity to your engine assembly.Experience and Quality – Your AdvantageAs a second-generation family business, we stand for long-standing tradition and high quality standards. With over 25 years of experience in supplying replacement parts for engines, you can count on our plug being robustly manufactured and meeting the demands of professional applications.
PLUG - 3817245 suitable for Volvo/Volvo Penta engines
Plug: Comparison number 3817245 – Quality assuredThe plug with the comparison number 3817245 is an essential OEM spare part for your needs. This product provides excellent fit, as it is specifically designed for use in various engines. The plug offers everything you would expect from a top-quality component, functioning optimally and keeping your engines in perfect condition.Suitable for Volvo/Volvo Penta enginesOur plug is suitable for Volvo/Volvo Penta engines and has been designed to the highest standards of quality and performance. As OEM spare parts, we ensure maximum reliability and efficiency of your engines in marine and stationary applications, as well as in locomotives. When choosing spare parts, it is crucial to pay attention to their compatibility and quality – and this is exactly where the plug with the comparison number 3817245 provides transparency.
PLUG - 3812105 suitable for Volvo/Volvo Penta engines
Innovative Product: PlugDiscover our OEM spare part that is suitable for Volvo/Volvo Penta engines: the plug with the comparison number 3812105. Weighing only 0.008 kg, the product is ideally suited to efficiently optimize the performance of your engines. This component meets the highest requirements and offers an excellent fit.
PLUG - 3809775 suitable for Volvo/Volvo Penta engines
Stainless Steel Plug with Comparison Number 3809775 Discover the plug with comparison number 3809775, an essential OEM spare part for your industrial requirements. This product impresses with its high functionality and quality, designed to meet the specific application needs in the marine and locomotive industries.Suitable for Volvo/Volvo Penta Engines The plug is optimally suitable and compatible with Volvo/Volvo Penta engines. Weighing only 0.014 kg, this spare part offers easy handling and optimal integration into your technical systems.
PLUG - 3809690 suitable for Volvo/Volvo Penta engines
Quality and Precision: Plug 3809690Discover our Plug with the comparison number 3809690, designed to be suitable for Volvo/Volvo Penta engines. This OEM replacement part demonstrates the highest precision, which is essential for the performance and efficiency of your engines. Weighing only 0.002 kg, it combines convenience and robustness.Perfect Fit for Your EnginesThe Plug belongs to the category of Locking parts and is suitable for lightweight and box systems to ensure precise functionality. Our long-standing experience in providing OEM replacement parts makes us the ideal partner for your business. Trust MOPA Motorparts to secure the full performance of your Volvo/Volvo Penta engines.
PLUG - 3808798 suitable for Volvo/Volvo Penta engines
Precision Component: Plug with Comparison Number 3808798Experience the plug with comparison number 3808798, an essential spare part for applications in marine and stationary areas. This precise product belongs to the category of locking parts and offers effective and reliable functionality with its lightweight of only 0.028 kg.Quality Features of OEM Spare PartsOur plug is an OEM spare part designed for Volvo/Volvo Penta engines. The manufacturing of this item is carried out to high standards, which is reflected in excellent fit and performance. Through internal controls during production, we ensure that all items meet the requirements.
PLUG - 3808606 suitable for Volvo/Volvo Penta engines
Efficient Plug for Top-Quality EnginesDiscover our plug with the comparison number 3808606, which has been specially designed as a highly suitable OEM replacement part for Volvo/Volvo Penta engines. This product ensures seamless integration into your system and is very practical to handle due to its lightweight of 0.022 kg.
Function and benefits
Locking parts are used to fix bolts, nuts, shafts or rotating elements in place. They protect against unintentional movement or unscrewing due to vibration, pressure changes or torque fluctuations. Benefits include:
- Secure hold of mechanical connections
- Increased system safety and reduced failure risk
- Improved service intervals and reliability
In high-performance diesel engines or marine drives, locking systems are critical to prevent loosening of vital components under continuous vibration and extreme temperatures.
Types of locking parts
Our range of locking parts includes:
- Locking washers (e.g. serrated, tab or spring washers)
- Locknuts and self-locking nuts
- Locking clips and retaining rings
- Split pins, cotter pins and safety wires
These components are available in materials such as spring steel, stainless steel, and corrosion-resistant alloys – ideal for use in marine environments or thermal cycling conditions.
Applications in marine and industrial systems
Locking parts are used in crankshaft assemblies, valve trains, coupling flanges, pump mounts and exhaust systems. In maritime settings, reliability under constant vibration and salt exposure is key. We offer OEM-locking solutions suitable for MTU, MAN, Volvo Penta, Deutz and MWM engines – suitable for both new builds and overhauls.
FAQ
What are locking parts used for?
Locking parts secure mechanical fasteners and rotating elements, preventing loosening due to vibration, pressure or thermal expansion. They are vital in engines and machinery to maintain operational safety and performance.
How do I choose the right locking part?
Selection depends on load, operating temperature, vibration level and component type. In high-stress environments, self-locking nuts or tab washers are often preferred over standard fasteners.
Are locking parts reusable?
Some locking parts like tab washers or safety clips are designed for single use, while others like locknuts or spring washers can be reused if undamaged. Always follow engine manufacturer guidelines for replacements.