3920400
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3920400, is a specialized fastener produced by Cummins, a leading manufacturer in the commercial truck industry. This screw is integral to the assembly and maintenance of various components within commercial trucks, ensuring secure and reliable fastening solutions.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of bolt characterized by its hexagonal head and flange feature. The hexagonal head allows for efficient torque application using standard tools, while the flange provides a bearing surface that distributes load and prevents the screw from being driven too far into the material. In fastening applications, this screw is used to join components securely, playing a role in maintaining structural integrity and operational efficiency ¹.

Role in Truck Operation

This Cummins part plays a specific role in the operation and maintenance of commercial trucks by securing critical components. It is often used in applications where vibration resistance and secure fastening are paramount, such as in engine mounts, chassis components, and various mechanical assemblies. Its design ensures that components remain firmly in place, contributing to the overall reliability and safety of the truck ².

Key Features

The 3920400 features a hexagonal head that allows for easy and precise tightening using common tools. The flange at the base of the head provides an additional surface area that helps distribute the load and prevents the screw from sinking into the material. Additionally, the cap screw functionality ensures a threaded connection that can be easily installed and removed, facilitating maintenance and repair processes.

Benefits

This part offers several benefits. Its design enhances fastening security by providing a stable and vibration-resistant connection. The flange feature ensures that the screw does not embed too deeply into the material, maintaining the integrity of the fastened components. Furthermore, the hexagonal head allows for straightforward installation and removal, making it a practical choice for both initial assembly and routine maintenance ³.

Troubleshooting and Maintenance

To troubleshoot common issues related to the 3920400, it is important to regularly inspect the screws for signs of wear, corrosion, or loosening. If a screw appears damaged or loose, it should be replaced to maintain the integrity of the fastened components. Regular maintenance practices, such as applying appropriate lubricants and ensuring proper torque settings during installation, can help ensure the longevity and performance of these screws.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing high-quality, reliable components. Their product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of commercial transportation.

Cummins Engine Compatibility with Part 3920400

The Hexagon Flange Head Cap Screw, part number 3920400, manufactured by Cummins, is a versatile component that fits into various Cummins engines. This part is integral to the assembly and maintenance of these engines, ensuring secure fastening and structural integrity.

Cummins 4B3.9, 6B5.9, 6C8.3, B3.9 G, B4.5, B5.6, B5.9, B5.9 GAS PLUS CM556, B5.9 CM2670 B166C, B6.7 CM2670 B153B, C GAS PLUS CM556, C8.3 G, G5.9, G5.9 CM558, G8.3

This part is used extensively across these engines for securing various components. It is particularly useful in applications where a robust and reliable fastening solution is required, such as in the engine block, cylinder heads, and other critical assemblies. The screw’s design ensures a tight and secure fit, which is essential for maintaining the structural integrity of these engines.

Cummins ISB (Chrysler), ISB CM2150, ISB CM550, ISB CM850, ISB/ISD6.7 CM2150 SN, ISB3.9 CM2220 B107, ISB5.9 CM2880 B127, ISB5.9G CM2180, ISB6.7 CM2250, ISB6.7 CM2350 B101

In the ISB series engines, the Hexagon Flange Head Cap Screw is utilized in several key areas. For instance, it is often used in the engine block and cylinder head assemblies to ensure that these components remain tightly fastened under high stress conditions. The screw’s flange head design provides a larger surface area for the application of torque, which is crucial for the longevity and performance of these engines. Additionally, the CM2150, CM550, and CM850 variants benefit from this screw in their specific configurations, ensuring that all parts are securely fastened and aligned.

Role of Part 3920400 Hexagon Flange Head Cap Screw in Engine Systems

The 3920400 is a critical component in the assembly and maintenance of Cummins engines. Its application spans across multiple systems, ensuring secure fastening and reliable operation.

Air Intake Connection

In the air intake system, the Hexagon Flange Head Cap Screw is used to secure the air intake connection to the engine block. This ensures a tight seal, preventing air leaks that could affect engine performance and efficiency.

Harness and Engine Control Wiring

For the engine control wiring and harness, this screw plays a role in mounting and securing electrical components. It ensures that wiring harnesses are firmly attached to the engine block or other structural components, reducing the risk of electrical issues due to loose connections.

Long Block Assembly

Within the long block assembly, the Hexagon Flange Head Cap Screw is employed to fasten various components such as the cylinder head, valve covers, and other critical parts. This secure attachment is essential for maintaining the structural integrity of the engine.

Mounting Components

The screw is also utilized in the mounting of ancillary components such as the oil pan. It ensures that these components are securely fastened to the engine block, which is vital for the overall stability and performance of the engine.

Oil Pan and Oil System

In the oil pan and oil system, the Hexagon Flange Head Cap Screw is used to attach the oil pan to the engine block. This secure fastening is important for maintaining the integrity of the oil pan, ensuring it can withstand the pressures and vibrations of engine operation without leaking.

Recirculation and Exhaust Systems

For recirculation and exhaust systems, the screw is used to secure components such as the exhaust manifold and recirculation valves. This ensures that these parts remain firmly in place, contributing to the efficient operation of the engine and reducing emissions.

Conclusion

The 3920400 Hexagon Flange Head Cap Screw is a vital component in the assembly and maintenance of Cummins engines and commercial trucks. Its robust design, ease of use, and versatility make it an essential part for ensuring the reliability and performance of these machines. Regular maintenance and proper installation practices are crucial for maximizing the longevity and effectiveness of this part.