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:
- 5039970316 suitable for MTU engines
Reliable Plug for Your MachinesDiscover our product, the plug, under the comparison number 5039970316. This OEM replacement part impresses with its excellent compatibility and is specifically designed to deliver optimal performance for MTU engines. Rely on quality and performance with this powerful component!
PLUG - 5039970130 suitable for MTU engines
Plug with comparison number 5039970130Discover our plug, which carries the comparison number 5039970130. This product is an essential locking part that meets the requirements for MTU engines and offers reliable performance in marine and stationary applications.OEM spare parts suitable for MTU enginesOur product is a high-quality OEM spare part that has been specifically designed and is suitable for MTU engines. This ensures that your engines operate optimally. Choose top-notch OEM spare parts while saving money without compromising on quality.
PLUG - 5039970035 suitable for MTU engines
Precision through Quality: Plug in UseThe plug with the comparison number 5039970035 is an outstanding OEM spare part categorized under locking parts. It ensures that your engines operate smoothly. This product provides precise support and is specifically designed to meet the highest demands for MTU engines.Reliability through ExperienceThe OEM spare part is a perfect fit for MTU engines and optimizes the functionality of your machines over long periods. Trust in a product backed by our decades of experience in the industry, representing our values as a second-generation family business.
PLUG - 5039970030 suitable for MTU engines
First-Class OEM Spare Part Suitable for MTU EnginesDiscover our plug, which offers the highest quality as an OEM spare part. With the comparison number 5039970030, it is ideally suited for engines that are compatible with MTU. This product belongs to the category of locking parts and meets industry standards.
PLUG - 5030610271 suitable for MTU engines
High-Quality Plug for Your Needs The plug with the reference number 5030610271 is an outstanding OEM replacement part, specifically designed for MTU engines. This product belongs to the category of locking parts and ensures perfect compatibility and enhanced performance that you expect from our top-notch replacement parts.Quality You Can Count On At MOPA Motorparts, we offer you only high-quality OEM replacement parts. The reference number 5030610271 identifies this plug, which is characterized by excellent craftsmanship. It meets the strict standards essential for engines.
PLUG - 5019970103 suitable for MTU engines
Quality Plug for MTU EnginesThe plug with the comparison number 5019970103 is an essential component that is ideally suited for your needs regarding MTU engines. Weighing only 0.026 kg, this product is functional and combines the optimal mix of lightweight and durability.
PLUG - 5019970030 suitable for MTU engines
Premium Plug for Your EnginesThe installed plug with the comparison number 5019970030 is a top-quality OEM replacement part specifically designed for MTU engines. As a locking part, it offers optimal functionality and reliability. This product impresses with demanding quality standards and is ideal for various engine applications.
PLUG - 5010610271 suitable for MTU engines
Exclusive Plug for High-Performance Engines Experience the Plug (comparison number: 5010610271), a premium OEM spare part that has been specifically designed for your needs. As part of the Locking parts, it offers high efficiency and ensures the functionality of your engines.Suitable for MTU Engines - Your Reliable Choice Our Plug is suitable for MTU engines, making it the perfect addition. We only supply OEM spare parts, whose quality is tailored to specific requirements. Whether for marine or stationary engines, this practical product is the right solution.
PLUG - 50035252750 suitable for MTU engines
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- 479979 suitable for Volvo/Volvo Penta engines
Buy Plug with Comparison Number 479979The plug with the comparison number 479979 is an outstanding OEM spare part specifically designed to support the functionality of your engines. This product impresses with its precision and easy integration. It belongs to the article group of springs and has a weight of only 0.01 kg.Suitable for Volvo/Volvo Penta EnginesThis OEM spare part is suitable for Volvo/Volvo Penta engines and ensures the functionality and efficiency of your machines. Our products offer the highest quality, enabling you to achieve optimal performance in marine and stationary technology as well as in locomotives.
PLUG - 479977 suitable for Volvo/Volvo Penta engines
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PLUG - 479976 suitable for Volvo/Volvo Penta engines
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PLUG - 479956 suitable for Volvo/Volvo Penta engines
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PLUG - 477777 suitable for Volvo/Volvo Penta engines
Quality of this Plug: Your ChoiceDiscover the plug designed for Volvo/Volvo Penta engines. With the reference number 477777, this OEM replacement part is an ideal choice to optimize the performance of your engines. The plug belongs to the category of locking parts and impresses with a weight of only 0.002 kg. This lightweight feature ensures effortless installation and saves valuable time.OEM Replacement Parts for Lasting EfficiencyOur products are made 100% from high-quality OEM replacement parts, providing you with the reliability your operation needs. Each replacement part, including the plug with reference number 477777, meets strict quality standards and enhances the efficiency of your engines that are suitable for Volvo/Volvo Penta engines.
PLUG - 471598 suitable for Volvo/Volvo Penta engines
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PLUG - 4705891891/00 suitable for MTU engines
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PLUG - 470475 suitable for Volvo/Volvo Penta engines
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PLUG - 469866 suitable for Volvo/Volvo Penta engines
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PLUG - 467366 suitable for Volvo/Volvo Penta engines
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PLUG - 466624 suitable for Volvo/Volvo Penta engines
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PLUG - 4571840056 suitable for MTU engines
Excellent OEM Replacement Part: Plug 4571840056Discover our excellent plug, identified by the reference number 4571840056. This product is an essential OEM replacement part that delivers reliable performance and meets quality standards.Suitable for MTU Engines – Optimal for Your NeedsThis plug is suitable for MTU engines and ensures the optimal functionality of your engines. With our OEM replacement part, we provide you with the assurance that your engines can continue to operate efficiently and powerfully.
PLUG - 4570140172 suitable for MTU engines
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PLUG - 422369 suitable for Volvo/Volvo Penta engines
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PLUG - 418571 suitable for Volvo/Volvo Penta engines
Plug for Efficient Engine PerformanceDiscover our plug (comparison number 418571), an essential OEM spare part optimized for the flawless operation of engines. Weighing only 0.005 kg, this product offers an unbeatable combination of quality and precision to enhance your machine efficiency.Suitable for Volvo/Volvo Penta EnginesThis plug is perfectly compatible with Volvo/Volvo Penta engines and ensures a smooth connection in competitive environments such as maritime applications and stationary locations. By using OEM spare parts like our plug, you ensure the longevity and safety of 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.