3680406
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3680406, is a specialized fastener produced by Cummins. This screw is integral to various commercial truck applications, providing secure fastening solutions that contribute to the overall reliability and performance of truck components. Cummins, a reputable manufacturer in the automotive industry, is known for its commitment to quality and innovation, ensuring that their products meet the rigorous demands of commercial vehicle operations ¹.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of bolt characterized by its hexagonal head and flanged base. The hexagonal head allows for efficient tightening and loosening using standard tools, while the flange provides additional surface area to distribute load and prevent the screw from sinking into softer materials. Within mechanical systems, these screws play a role in securing components together, ensuring structural integrity and proper function ².

Purpose and Role in Truck Operation

The 3680406 Hexagon Flange Head Cap Screw serves specific purposes in truck operations. It is commonly used in applications where high tensile strength and resistance to loosening are required. This screw supports various systems within the truck, including engine components, chassis assemblies, and other critical areas where secure fastening is necessary to maintain operational efficiency and safety.

Key Features

The 3680406 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance and reliability. Its hexagonal head design allows for straightforward installation and removal using common tools. The flange at the base of the screw provides additional bearing surface, which helps in distributing the load more evenly and preventing the screw from embedding into the material. Additionally, the screw is crafted from high-quality materials, ensuring durability and resistance to corrosion and wear.

Benefits

Using the 3680406 Hexagon Flange Head Cap Screw offers several advantages. The screw’s design contributes to its durability, making it suitable for high-stress applications. Its resistance to loosening ensures that connections remain secure over time, reducing the need for frequent maintenance. Furthermore, the ease of installation, thanks to its hexagonal head, allows for efficient assembly and disassembly processes.

Installation and Usage

Proper installation of the 3680406 Hexagon Flange Head Cap Screw is vital to ensure its effectiveness and longevity. It is important to follow torque specifications provided by the manufacturer to achieve the correct tension without overtightening, which could lead to damage. Best practices include using the appropriate tools and ensuring that the surfaces being fastened are clean and free of debris to promote a strong and secure connection ³.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws may include loosening over time or corrosion in harsh environments. Regular inspections can help identify these problems early. Troubleshooting tips include checking for proper torque and ensuring that the screw and surrounding components are free of corrosion. Maintenance practices such as applying anti-seize compound during installation can enhance the screw’s performance and longevity.

Safety Considerations

When working with the 3680406 Hexagon Flange Head Cap Screw, it is important to observe safety practices to protect both the operator and the equipment. This includes wearing personal protective equipment, such as gloves and safety glasses, to prevent injury. Additionally, following proper handling procedures and using the correct tools for installation and removal can help avoid accidents and ensure the screw’s integrity.

Cummins Overview

Cummins is a well-established manufacturer in the automotive industry, known for its high-quality components and innovative solutions. The company’s reputation is built on a commitment to excellence, reliability, and continuous improvement. Cummins’ products, including the 3680406 Hexagon Flange Head Cap Screw, are designed to meet the demanding requirements of commercial vehicle applications, ensuring performance, durability, and safety.

Cummins Engine Part 3680406: Hexagon Flange Head Cap Screw

The Cummins part number 3680406, a Hexagon Flange Head Cap Screw, is a critical component in the assembly and maintenance of several Cummins engine models. This part is designed to provide secure fastening in various engine applications, ensuring that components remain tightly secured under operational stresses.

ISB and ISBE Series Engines

The ISB CM850, ISBE CM800, and other ISB series engines utilize the 3680406 screw in various applications. These engines, known for their reliability and efficiency, often require precise fastening to maintain performance and safety standards. The screw’s design allows for easy installation and removal, facilitating maintenance tasks.

ISX Series Engines

The ISX CM570, ISX CM870, ISX15 CM2250, ISX15 CM2250 SN, and ISX15 CM2350 X101 engines also incorporate the 3680406 screw. These engines, part of the ISX series, are designed for heavy-duty applications and require robust fastening solutions to handle the high stresses and torques involved.

QSB and QSK Series Engines

The QSB5.9 44 CM550, QSB5.9 CM550, QSK45 CM500, QSK60 CM500, QSK60 G CM2358 K110, QSK60G, QSK78 CM500, and QSK95 CM2350 K111, QSK95 CM2350 K113 engines utilize the 3680406 screw in their construction. These engines, part of the QSB and QSK series, are known for their versatility and performance across various applications. The screw’s design ensures that components are securely fastened, contributing to the engine’s overall reliability.

QSV and QSX Series Engines

The QSV91-G4 CM558/CM700 V102, QSV91G, QSX15 CM2250 ECF, and QSX15 CM2350 X105 engines also feature the 3680406 screw. These engines, part of the QSV and QSX series, are designed for specific applications requiring high performance and durability. The screw’s design allows for precise fastening, ensuring that components remain securely attached under operational conditions.

Role of Part 3680406 Hexagon Flange Head Cap Screw in Engine Systems

The part 3680406 Hexagon Flange Head Cap Screw is instrumental in securing and maintaining the integrity of various engine components. Its application spans across multiple systems, ensuring efficient operation and durability.

Compressor and Air Systems

In compressor systems, the Hexagon Flange Head Cap Screw is used to fasten components that manage air compression and transfer. It secures connections within the air transfer drive, ensuring a tight seal that prevents air leaks. This is vital for maintaining the efficiency of the compressor, as any leakage can lead to a drop in performance.

Drive and Fan Systems

For the drive and fan systems, this screw plays a significant role in attaching the fan to its housing. The secure attachment is essential for the fan’s operation, as it ensures that the fan can spin without wobbling, which could otherwise lead to imbalance and increased wear on the system.

Water Pump and Filter Systems

In water pump systems, the Hexagon Flange Head Cap Screw is employed to attach the pump to its housing. This secure fitting is necessary to prevent leaks and ensure that the water pump can operate efficiently, providing consistent cooling to the engine. Similarly, in fuel and lubricating oil filter systems, it is used to attach filter housings, ensuring that the filters are properly sealed and can effectively remove contaminants from the fluids.

Flywheel and Housing Systems

The screw is also pivotal in attaching the flywheel to its housing. This secure connection is important for the smooth operation of the engine, as it ensures that the flywheel can rotate without any misalignment, which is essential for the engine’s balance and performance.

Thermostat and Module Systems

In thermostat and module systems, the Hexagon Flange Head Cap Screw is used to secure the thermostat housing. This is important for maintaining the engine’s temperature within optimal ranges, as any looseness could lead to temperature fluctuations that affect engine performance.

Fuel Control and Plumbing Systems

For fuel control systems, the screw is used to attach components that regulate fuel flow. In plumbing systems, it secures connections that manage the flow of fluids, ensuring that there are no leaks that could affect the system’s efficiency.

Charge Air Bypass and Auxiliary Systems

In charge air bypass systems, the screw is used to secure components that manage the flow of air, ensuring that the system can operate efficiently under various conditions. In auxiliary systems, it is used to attach components that support the main engine functions, ensuring that these systems can operate reliably.

Conclusion

The Hexagon Flange Head Cap Screw, part 3680406, is a versatile component that plays a significant role in the secure attachment and efficient operation of various engine systems. Its application across different components underscores its importance in maintaining the overall performance and reliability of the engine.