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 - 3094210211 suitable for MTU engines
Plug for Optimal Engine PerformanceDiscover our plug, marked with the comparison number 3094210211. This OEM replacement part provides optimal performance and processing for your applications. Rely on the quality that only OEM replacement parts can offer.
PLUG - 22173239 suitable for Volvo/Volvo Penta engines
Premium Plug with Comparable Number 22173239 Discover our premium plug, identified by the comparable number 22173239. This OEM replacement part is specifically designed to fit Volvo/Volvo Penta engines. At MOPA Motorparts, we only offer products that meet the highest quality standards and ensure precise fitting.Optimal Quality for Your Engines The plug is a reliable component that fits perfectly for your applications in the marine or stationary engine sector. It provides excellent operational characteristics and durability. Trust in OEM replacement parts specifically manufactured for Volvo/Volvo Penta to maximize the efficiency of your engines.
PLUG - 21974827 suitable for Volvo/Volvo Penta engines
Flexible Plug – Comparison Number 21974827Discover our Plug with the comparison number 21974827. This excellent OEM spare part belongs to the group of Locking parts and offers reliable functionality. It is optimally suited as a replacement part suitable for Volvo/Volvo Penta engines and impresses with its light weight of only 0.006 kg.
PLUG - 3074210011 suitable for MTU engines
Plug suitable for MTU – Your ideal OEM replacement partDiscover our valuable plug with the comparison number 3074210011. This product belongs to the category of locking parts and is specifically suitable for engines compatible with MTU. Use this OEM replacement part to ensure quality standards in your operations.Extensive Selection – More than just a plugWith over 25 years of experience and a wide range of more than 1 million spare parts, we provide you products that are compatible with MTU engines. This OEM replacement part is optimally aligned with the requirements of engines suitable for MTU and is used in demanding applications.
PLUG - 21913841 suitable for Volvo/Volvo Penta engines
Precision and Efficiency with PlugThe plug with the reference number 21913841 is an essential OEM replacement part that supports the control of your Volvo/Volvo Penta engines. This product is designed for engines and ensures ideal fit thanks to its precise manufacturing. With a weight of only 0.032 kg, the plug allows for robust use under demanding conditions in marine and stationary applications.
PLUG - 305G06045/1 suitable for MTU engines
Innovative Plug for Effective EnginesDiscover the plug with the comparison number 305G06045/1, an essential OEM replacement part for various engines. This product is suitable for diesel applications as well as for large gas engines and ensures efficient engine management and long lifespan.Reliable Locking Part Suitable for MTU EnginesThe comparison number 305G06045/1 identifies our OEM replacement part specifically for applications suitable for MTU. As a second-generation family business, you can rely on the consistent quality of our product line 'locking parts'.
PLUG - 21800111 suitable for Volvo/Volvo Penta engines
OEM Replacement Part with Comparison Number 21800111Discover the innovative Plug, which not only serves as an essential component for your engine but is also known by the comparison number 21800111. This product is designed to meet the demands of engines and impresses with precise manufacturing and high compatibility.Suitable for Volvo/Volvo Penta EnginesThis Plug is suitable for Volvo/Volvo Penta engines and is made from the best materials. It effortlessly withstands the high demands in both marine and stationary applications. Weighing only 0.035 kg, this OEM replacement part can be easily installed and integrates excellently into your existing engine concept.
PLUG - 21796164 suitable for Volvo/Volvo Penta engines
Premium Spare Part: Plug with Comparison Number 21796164Discover our high-performance Plug with the comparison number 21796164, specifically designed to fit Volvo/Volvo Penta engines. This product proves to be extremely beneficial when used in combination with mobile solutions. With a lightweight of only 0.008 kg, this spare part can be easily installed and is highly reliable at the same time.OEM Spare Parts: Quality You Can Rely OnOur custom OEM spare parts are characterized by the highest precision and reliability. The Plug, specially manufactured with the comparison number 21796164, speaks volumes about its efficiency features in the market. This means it comes from top manufacturers who create their products under strict industrial standards, allowing you to make hardly any compromises in terms of performance.
PLUG - 21666520 suitable for Volvo/Volvo Penta engines
Features of the Plug with Comparison Number 21666520Discover the top-quality plug with the comparison number 21666520. This OEM spare part ensures consistent quality and durability in your engine operation. As an essential product, it is specifically designed for use in Volvo/Volvo Penta engines.Ideal for Engine PerformanceThe OEM spare part not only offers optimal fitting but also the highest efficiency for engines. The plug weighs only 0.038 kg, allowing for easy installation and maintenance. The precision of these components makes them an excellent choice for professional users.
PLUG - 21455743 suitable for Volvo/Volvo Penta engines
Efficient Plug for Technical ApplicationsDiscover our plug with the comparison number 21455743, which is offered in the category of OEM spare parts. This specific product is suitable for Volvo/Volvo Penta engines and provides an effective solution for your mechanical needs. The plug weighs only 0.05 kg and impresses with its easy handling and robust performance.Quality through Comparison Number 21455743The comparison number 21455743 stands for an OEM spare part that meets the specific requirements of the manufacturers. Compared to aftermarket components, our product ensures complete compatibility and durability in your technology chain. Invest in quality and optimize the performance of your applications with our customized components.
PLUG - 21399013 suitable for Volvo/Volvo Penta engines
Optimal Performance with Plug 21399013 Discover our Plug, which offers you excellent quality for your Volvo/Volvo Penta engines. The comparison number 21399013 clearly identifies this OEM spare part as a suitable product for applications in marine and stationary areas. With a lightweight of only 0.005 kg, this product impresses with its reliability and durability, keeping your engines in top condition.Suitable for All Marine Requirements Choosing the right spare part is crucial for the efficiency of your engines. Our Plug, developed specifically for Volvo/Volvo Penta engines, meets the highest standards and ensures that your machines consistently deliver outstanding performance. This indispensable OEM spare part plays a key role in avoiding unexpected downtime, helping you save costs.
PLUG - 21399010 suitable for Volvo/Volvo Penta engines
Excellent: The Plug with Comparison Number 21399010Discover our outstanding product, the Plug with the comparison number 21399010. This OEM spare part is specifically suitable for Volvo/Volvo Penta engines and belongs to the group of Locking parts. Weighing only 0.013 kg, this product offers effortless handling and installation, allowing your engine to be ready for use quickly.
PLUG - 21364517 suitable for Volvo/Volvo Penta engines
PLUG with the comparison number 21364517 suitable for Volvo/Volvo Penta engines
PLUG - 21364512 suitable for Volvo/Volvo Penta engines
OEM Replacement Part Plug - Comparison Number 21364512The robustly constructed plug with the comparison number 21364512 is your ideal OEM replacement part, compatible with Volvo/Volvo Penta engines. With excellent precision and the required properties, it ensures reliable and durable functionality. Perfectly suitable for applications in marine and stationary technology, this product impresses through close collaboration with experienced manufacturers.
PLUG - 21349017 suitable for Volvo/Volvo Penta engines
Excellent Spare Part: Comparison Number 21349017Discover the Plug with the comparison number 21349017. This product is an essential locking part suitable for Volvo/Volvo Penta engines. Weighing only 0.001 kg, this OEM spare part impresses with its outstanding fit and durability. Rely on our OEM spare parts to optimize the functionality of your engines.Variety of Spare Parts in the RangeAs one of the leading suppliers, we offer over 1 million spare parts. The Plug 21349017 shines as part of our portfolio, which provides comprehensive solutions for various engines. Every OEM spare part we sell encompasses the highest precision and quality, ensuring that you can always rely on dependable components.
PLUG - 21345611 suitable for Volvo/Volvo Penta engines
High-Quality Plug in the PortfolioDiscover our Plug, which is listed with the comparison number 21345611. This replacement part plays a crucial role in the functionality of your engine. Weighing only 0.13 kg, it is both lightweight and user-friendly, making it perfect for use in demanding environments.
PLUG - 21334134 suitable for Volvo/Volvo Penta engines
Quality that Convicts: OEM Replacement Parts Discover our premium product, the Plug with the comparison number 21334134, specially designed for Volvo/Volvo Penta engines. As part of the product group of Locking parts, this OEM replacement part offers reliability and safety. Weighing only 0.004 kg, it is lightweight and handy, making your maintenance tasks easier.Enhance Your Engine Performance Using this Plug ensures that your engines operate optimally even under extreme conditions. As an OEM replacement part, it seamlessly integrates into your requirements, suitable for Volvo/Volvo Penta engines, to maximize the efficiency of your applications.
PLUG - 21330056 suitable for Volvo/Volvo Penta engines
Essential Plug: Comparison Number 21330056Discover the essential plug with comparison number 21330056. This product is suitable for applications in engines, particularly in the series of Volvo/Volvo Penta. Weighing only 0.041 kg, it provides an ideal solution for various requirements and enhances the efficiency of your machinery.Superior Quality with OEM Spare PartsOur OEM spare parts, which include the plug, are distinguished by their outstanding quality. The plug with comparison number 21330056 brings the necessary reliability for engines compatible with Volvo/Volvo Penta into your processes in the long term.
PLUG - 21297814 suitable for Volvo/Volvo Penta engines
Discover the Plug with the reference number 21297814Discover our product, which stands out as a Plug with the reference number 21297814. This OEM replacement part is a crucial component that is compatible with engines designed for Volvo/Volvo Penta. Thanks to its top-notch workmanship, the Plug can be easily integrated and provides reliable functionality that is essential for the operational readiness of your applications.Optimal Fit through OEM Replacement PartsWeighing only 0.114 kg, the replacement part suitable for Volvo/Volvo Penta offers excellent features in the category of Locking parts. As a B2B customer, you benefit from the reliability and excellent fit that our products are known for, making their frequent use in marine and stationary applications necessary.
PLUG - 21281430 suitable for Volvo/Volvo Penta engines
Safe OEM Spare Part Suitable for Specific EnginesDiscover our OEM spare part, the plug with comparison number 21281430. This product is an essential component in the group of locking parts and offers a solid solution for those who value perfection. Compatible with Volvo/Volvo Penta engines, it contributes to the optimal functionality and durability of your systems.Efficient Lightweight with Important BenefitsWeighing only 0.014 kg, the plug is the perfect choice to support the interaction of your engines. Compatible with Volvo/Volvo Penta engines, this accessory ensures that your machines operate under the best conditions. Rely on the excellent quality of our OEM spare parts, which have been specifically designed to meet the highest standards.
PLUG - 21235760 suitable for Volvo/Volvo Penta engines
Discover the precise Plug for your engineThe Plug with the comparison number 21235760 is the right choice for any engine operator. The product features excellent fit accuracy and offers unmatched reliability that you can expect from retailers like MOPA Motorparts. With OEM replacement parts, you ensure safety that only high-quality components can provide, without the risk of aftermarket products.OEM replacement parts for optimal engine performanceOur products are the result of top-notch standards and are specifically developed as OEM replacement parts to continually deliver excellent performance. This Plug is suitable for Volvo/Volvo Penta engines, allowing you to rely on perfect functionality during use. We support the efficiency and longevity of your machines, which keeps operations efficient.
PLUG - 21235758 suitable for Volvo/Volvo Penta engines
Excellent Plug for Your EnginesDiscover our top-quality plug with the comparison number 21235758, specifically designed as an OEM replacement part. This product belongs to the group of locking parts and is ideal if you are looking for a reliable component that can be easily integrated into your engines.Suitable for Volvo/Volvo Penta EnginesThis plug is a perfect fit for Volvo/Volvo Penta engines and demonstrates high accuracy as well as straightforward installation. Weighing only 0.081 kg, it impresses with its ease of handling and excellent performance.
PLUG - 21203185 suitable for Volvo/Volvo Penta engines
Premium Plug with Comparison Number 21203185Discover the plug with the comparison number 21203185. It is a top-quality OEM replacement part, particularly valued in the category of locking parts. Weighing only 0.038 kg, it is lightweight and ideal for installation.Suitable Approach for Volvo/Volvo Penta EnginesThe product with the comparison number 21203185 is suitable for engines compatible with Volvo/Volvo Penta. Thanks to the high quality standards of OEM replacement parts, you can be confident that each component fits perfectly and meets a variety of requirements.
PLUG - 21195401 suitable for Volvo/Volvo Penta engines
Reliable Performance: Plug with Comparison Number 21195401The plug with the comparison number 21195401 is the optimal solution for engines that rely on reliability and efficiency. As an OEM replacement part, it offers tailored quality for applications in marine and stationary use. Trust that our product is a perfect fit and represents more than just a replacement part – it is an essential component for your engines.
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.