3421904
Socket Head Cap Screw
Cummins®

The Socket Head Cap Screw, part number 3421904 by Cummins, is a critical component in commercial truck maintenance. It contributes to the structural integrity and functionality of various truck components. Understanding its role and significance is essential for maintaining the efficiency and safety of commercial vehicles.

Basic Concepts of Socket Head Cap Screws

Socket Head Cap Screws are fasteners with a hexagonal socket in the head, designed for use with a hex key or socket wrench. They are commonly used in the automotive industry to join components that require a strong, permanent connection. Mechanically, they convert torque applied to the head into compressive force, securing the joined parts ¹.

Purpose of the 3421904 Socket Head Cap Screw in Truck Operation

The 3421904 Socket Head Cap Screw is utilized in various truck systems and components where a secure and durable fastening solution is required. Its applications range from engine components to chassis parts, ensuring that critical connections remain intact under operational stress ².

Key Features of the 3421904 Socket Head Cap Screw

This Cummins part is characterized by its design and manufacturing attributes. It is made from materials that offer high strength and durability, with a thread type that provides secure fastening. The head design allows for efficient torque application, enhancing its performance in heavy-duty applications ³.

Benefits of Using the 3421904 Socket Head Cap Screw

Using this part offers several advantages. Its enhanced strength ensures reliable connections, while its corrosion resistance prolongs its service life in various environments. The design also facilitates ease of installation, contributing to its reliability in demanding applications.

Installation and Usage Guidelines

Correct installation of the 3421904 Socket Head Cap Screw is vital for optimal performance. It is recommended to follow specific torque specifications and use appropriate tools to ensure the screw is securely fastened without over-tightening, which could lead to damage.

Troubleshooting Common Issues

Typical problems with Socket Head Cap Screws include loosening or corrosion. Regular inspections can help identify these issues early. Solutions may involve re-tightening the screw or, in cases of significant corrosion, replacing the screw to maintain truck efficiency.

Maintenance Tips

Regular maintenance of Socket Head Cap Screws is recommended to prevent failures. This includes routine inspections for signs of wear or corrosion and following replacement guidelines when necessary. Proper maintenance ensures the continued safe operation of the truck.

Cummins: A Brief Overview

Cummins Inc. is a leader in the diesel engine and related technologies market. With a rich history and a diverse product range, Cummins is committed to quality and innovation, providing reliable solutions for commercial vehicle applications.

Cummins Socket Head Cap Screw 3421904 in Engine Applications

The Cummins Socket Head Cap Screw part number 3421904 is a critical component in various engine assemblies. This part is designed to provide secure fastening in applications where both strength and precision are paramount.

QSV81G and QSV91G Engines

In the QSV81G and QSV91G engines, the 3421904 Socket Head Cap Screw is utilized in several key areas. These engines, known for their robust performance, require reliable fastening solutions to maintain structural integrity and operational efficiency. The screw’s design ensures that it can withstand the high stresses and vibrations typical in these engine environments.

QSW/QSV82 Engines

For the QSW/QSV82 engines, the 3421904 Socket Head Cap Screw plays a vital role in securing various engine components. This engine model, which combines advanced technology with durability, benefits from the screw’s precision and strength. The screw’s application in these engines ensures that all parts are held firmly in place, contributing to the overall reliability and longevity of the engine.

QSW73 Engine

In the QSW73 engine, the 3421904 Socket Head Cap Screw is used to fasten components that are subject to significant mechanical forces. This engine, designed for high-performance applications, relies on the screw’s ability to provide a secure and stable connection. The screw’s role in this engine is crucial for maintaining the engine’s structural integrity and ensuring smooth operation.

Each of these engines benefits from the 3421904 Socket Head Cap Screw’s ability to provide a strong, reliable fastening solution. The screw’s design and material ensure that it can perform effectively in the demanding conditions of engine applications.

Role of Part 3421904 Socket Head Cap Screw in Various Engine Components

The part 3421904 Socket Head Cap Screw is integral to the secure assembly and operation of several engine components. Its application spans across various systems, ensuring the structural integrity and functional efficiency of the engine.

Turbocharger Systems

In turbocharger arrangements, the Socket Head Cap Screw is utilized to fasten the turbocharger assembly to the engine block. This secure attachment is vital for maintaining the turbocharger’s alignment and operational stability. Additionally, it plays a role in the assembly for turbocharger lubricating oil, where it ensures the oil passages and connections remain intact, facilitating smooth lubrication and cooling of the turbocharger.

Lubricating Oil Systems

Within the assembly lubricating oil and the assembly turbocharger lubricating oil V18, the Socket Head Cap Screw is employed to secure oil passages, filters, and sensors. This ensures a consistent flow of lubricating oil throughout the engine, reducing friction and wear on moving parts.

Exhaust Systems

The screw is also fundamental in the exhaust assembly manifold and the exhaust manifold. It secures the manifold to the engine and to the exhaust system, ensuring a tight seal that prevents exhaust leaks. Furthermore, in the exhaust manifold assembly support and the manifold exhaust assembly, it provides the necessary strength to withstand the high temperatures and pressures generated during engine operation.

Water and Plumbing Systems

In water and plumbing systems, such as the water inlet connection and the water outlet connection, the Socket Head Cap Screw ensures a secure and leak-proof connection. It is also used in the water pump and water pump mounting to attach the pump to the engine, ensuring efficient coolant circulation. In the water assembly pump and water mounting pump, it secures various components, maintaining the integrity of the cooling system.

Additional Applications

The screw is also pivotal in the pump, water, and pump water assy (Gilkes), where it ensures the secure attachment of pump components. In the turbocharger plumbing and turbocharger plumbing assembly, it maintains the integrity of the plumbing connections, essential for the efficient operation of the turbocharger.

Overall, the part 3421904 Socket Head Cap Screw is a versatile fastener that plays a significant role in the secure and efficient operation of various engine components.

Conclusion

The 3421904 Socket Head Cap Screw by Cummins is a vital component in the maintenance and operation of commercial trucks. Its robust design, high strength, and corrosion resistance make it suitable for a wide range of applications in engine and chassis components. Proper installation, regular maintenance, and timely replacement are key to ensuring the continued efficiency and safety of commercial vehicles.