3680420
Threaded Plug
Cummins®

The Cummins 3680420 Threaded Plug is a critical component in commercial truck operations, designed to enhance the efficiency and reliability of truck systems. Understanding its purpose and functionality is essential for maintaining optimal vehicle performance.

Basic Concepts of Threaded Plugs

Threaded plugs are mechanical components used to seal openings in various systems by being screwed into place, creating a secure seal that prevents fluid or gas leakage. They are vital in automotive and industrial applications, including engines and hydraulic systems, to maintain system integrity and efficiency ¹.

Purpose of the Cummins 3680420 Threaded Plug

The Cummins 3680420 Threaded Plug is designed to seal and manage pressure within truck systems, ensuring that fluids or gases remain contained within their designated pathways. This is crucial for the proper operation and longevity of the vehicle ².

Key Features

This Cummins part is characterized by its specific thread type and durable material composition, chosen for its corrosion resistance and high-temperature tolerance. These features ensure reliable performance in demanding environments.

Benefits

Utilizing the Cummins 3680420 Threaded Plug offers advantages such as improved system reliability, ease of installation, and long-term cost savings due to its durable construction and reliable performance.

Troubleshooting and Maintenance

Common issues with threaded plugs include leakage due to wear or improper installation. Regular inspection and maintenance, following manufacturer guidelines, are recommended to ensure optimal performance and longevity of the plug.

About Cummins

Cummins Inc. is a global leader in designing, manufacturing, and distributing engines, filtration, and power generation products. The company is committed to innovation and sustainability, providing reliable and efficient solutions for commercial, industrial, and automotive markets.

Compatibility with Cummins Engines

The Threaded Plug 3680420 is compatible with a variety of Cummins engine models, including the ISB, QSB, and QSK series, among others. This compatibility ensures a secure and reliable connection across different engine systems, highlighting the plug’s versatility and robustness.

Role of the 3680420 Threaded Plug in Engine Systems

The 3680420 Threaded Plug is integral to the functionality and efficiency of various engine systems. Its applications include:

• Air Intake and Fuel Systems: Securing connections to prevent leaks and ensure consistent airflow and fuel delivery.
• Crankcase and Oil Systems: Managing pressure and preventing oil leaks in the crankcase breather and oil pan systems.
• Cooling and Vacuum Systems: Maintaining system integrity by sealing connections in the thermostat and vacuum pump systems.
• Specialized Engine Systems: Ensuring the efficient operation of advanced systems like the XPI JV System Cummins HD and XPI JV System Scania HD.
• Structural and Maintenance Components: Aiding in securing parts and facilitating easier access for maintenance in components like the cylinder block and hand hole cover.
• Integration with Other Engine Parts: Enhancing structural integrity and operational efficiency when integrated with components like the front drive adapter and oil drain connection.

Conclusion

The Cummins 3680420 Threaded Plug is a versatile and essential component for the efficient and reliable operation of various engine systems. Its role in sealing and securing connections is fundamental to the overall performance and maintenance of the engine.