3925402
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3925402, is a component manufactured by Cummins, a well-established name in the automotive and heavy-duty truck industry. This screw plays a significant role in the assembly and maintenance of commercial trucks, ensuring the secure fastening of various components. Cummins is renowned for its commitment to quality and innovation, making this screw a reliable choice for truck manufacturers and maintenance professionals ¹.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flanged base. The hexagonal head allows for efficient torque application using standard tools, while the flange provides additional surface area to distribute load and prevent the screw from sinking into softer materials. In the context of a truck’s mechanical system, this screw is used to secure components that require a high degree of stability and resistance to vibration ².

Purpose and Role

The 3925402 Hexagon Flange Head Cap Screw serves a specific purpose in the operation of a truck. It is designed to connect or secure components that are subject to significant stress and vibration, such as engine mounts, transmission components, and chassis parts. By providing a secure and stable connection, this screw contributes to the overall reliability and performance of the truck ³.

Key Features

The 3925402 Hexagon Flange Head Cap Screw boasts several key features that enhance its effectiveness and durability. Its hexagonal head design allows for easy and precise torque application, ensuring that the screw is tightened to the correct specification. The flange characteristic provides additional stability and load distribution, reducing the risk of the screw loosening over time. Additionally, the screw is made from high-quality materials that offer excellent resistance to corrosion and wear, ensuring a long service life in demanding environments.

Benefits

The use of the 3925402 Hexagon Flange Head Cap Screw offers several benefits. Its design enhances stability by providing a larger contact area between the screw and the fastened components. The resistance to loosening ensures that connections remain secure even under vibration and stress. Furthermore, the ease of installation and removal, thanks to its hexagonal head, allows for efficient maintenance and repair procedures.

Installation and Usage

Proper installation of the 3925402 Hexagon Flange Head Cap Screw is crucial for optimal performance. It is recommended to use a torque wrench to apply the specified torque, ensuring that the screw is neither over-tightened nor under-tightened. Best practices include cleaning the mating surfaces before installation to prevent corrosion and using a thread lubricant to facilitate easy removal in the future. Following these guidelines will help maintain the integrity of the connection and prolong the lifespan of the screw.

Troubleshooting and Maintenance

Common issues with the 3925402 Hexagon Flange Head Cap Screw may include loosening due to vibration or corrosion. Regular inspection and maintenance can help identify and address these issues before they lead to more significant problems. If loosening is detected, the screw should be re-tightened to the specified torque. In cases of corrosion, the affected area should be cleaned, and a corrosion-resistant coating may be applied to prevent further degradation. Proper maintenance practices will help ensure the longevity and reliability of the screw.

Cummins Overview

Cummins is a leading manufacturer in the automotive and heavy-duty truck industry, with a history of innovation and quality. The company is known for its commitment to producing reliable and high-performance components, including the 3925402 Hexagon Flange Head Cap Screw. Cummins’ reputation is built on its dedication to research and development, ensuring that its products meet the demanding requirements of commercial truck applications. The company’s focus on quality and customer satisfaction has established it as a trusted name in the industry.

Hexagon Flange Head Cap Screw 3925402 in Cummins Engines

The Hexagon Flange Head Cap Screw 3925402, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is designed to secure different parts within the engine, ensuring structural integrity and operational efficiency. Below is a detailed overview of how this part fits into specific Cummins engines:

Cummins 6B5.9 and 6C8.3 Engines

The 6B5.9 and 6C8.3 engines utilize the 3925402 screw for fastening components that require a secure and reliable connection. This includes securing various engine covers and housings, ensuring that these parts remain firmly attached under operational stresses.

Cummins B3.3, B4.5, and B5.9 G Engines

In the B3.3, B4.5, and B5.9 G engines, the 3925402 screw is employed to fasten critical components such as the cylinder head cover and other auxiliary parts. Its design ensures that these parts are held securely, preventing any potential loosening that could lead to engine malfunction.

Cummins B6.7 Engines

The B6.7 engine series, including variants like B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C, and B6.7 G CMOH6.0 B125, incorporates the 3925402 screw in several applications. This includes securing the cylinder head cover, intake manifold, and other engine components that require a robust fastening solution. The screw’s hexagonal flange head provides a larger surface area for torque application, ensuring a tight and reliable fit.

Cummins C GAS PLUS CM556 and C8.3 G Engines

The C GAS PLUS CM556 and C8.3 G engines also benefit from the use of the 3925402 screw. It is used to fasten various engine covers and housings, ensuring that these parts remain securely attached during operation. This is crucial for maintaining the engine’s structural integrity and preventing any potential leaks or failures.

Cummins D4.0, F2.8, and F3.8 Engines

The D4.0 CM2620 D103B, F2.8 CM2620 F135B, and F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F3.8 F102, F4.5 CM2620 F139B, and F4.5 CM2620 F141C engines use the 3925402 screw for fastening components such as the cylinder head cover, intake manifold, and other critical parts. The screw’s design ensures that these components are held securely, preventing any potential loosening that could lead to engine malfunction.

Cummins G8.3 and ISB Engines

The G8.3 and ISB engines, including variants like ISB (Chrysler), ISB CM550, ISB/ISD4.5 CM2150 B119, ISB/ISD6.7 CM2150 SN, and ISB4.5 CM2350 B104, incorporate the 3925402 screw in several applications. This includes securing the cylinder head cover, intake manifold, and other engine components that require a robust fastening solution. The screw’s hexagonal flange head provides a larger surface area for torque application, ensuring a tight and reliable fit.

In summary, the Hexagon Flange Head Cap Screw 3925402 is a versatile and essential component in various Cummins engine models. Its design and application ensure that critical engine components remain securely fastened, contributing to the overall reliability and performance of the engine.

Role of Part 3925402 Hexagon Flange Head Cap Screw in Engine Systems

The part 3925402 Hexagon Flange Head Cap Screw is integral to the secure assembly and operation of various engine components. Its robust design ensures reliable fastening in high-stress environments, making it suitable for several applications within engine systems.

Alternator Drive Arrangement

In the alternator drive arrangement, the Hexagon Flange Head Cap Screw secures the alternator to the engine block or mounting bracket. This ensures the alternator remains firmly in place, allowing it to generate electricity efficiently without vibrations that could lead to failure.

Oil Fill Arrangement

For the oil fill arrangement, this screw is often used to fasten the oil fill cap or the oil filter housing. Its flange head provides additional surface area for a tighter seal, preventing oil leaks and ensuring the engine receives consistent lubrication.

Turbocharger

Within the turbocharger assembly, the Hexagon Flange Head Cap Screw is employed to secure the turbocharger to the engine or exhaust manifold. This fastening is vital for maintaining the turbocharger’s alignment and operational integrity under high-pressure conditions.

Brake System

In brake systems, particularly those involving calipers or brackets, this screw ensures components are tightly secured. This is essential for maintaining brake performance and safety, especially under varying load conditions.

Compressor and Air Connection

For compressors and air connections, the screw is used to fasten components such as the compressor housing or air intake manifold. Its design helps withstand the high pressures and temperatures typical in these systems.

Air Intake Drive and Alternator Drive

In air intake drives and additional alternator drives, the Hexagon Flange Head Cap Screw secures components like the air intake manifold or alternator pulley. This ensures smooth operation and reduces the risk of component dislodgement.

Fan and Filter Assemblies

The screw is also utilized in fan and filter assemblies to secure components like the fan housing or fuel filter. This is important for maintaining the integrity of these systems, ensuring efficient airflow and filtration.

Fuel and Lubricating Oil Systems

In fuel and lubricating oil systems, the screw fastens critical components such as the fuel control module, lubricating oil filter head, and thermostat housing. This ensures these systems operate without leaks or component failure.

Manifold and Module Assemblies

For air intake manifolds and fuel control modules, the Hexagon Flange Head Cap Screw provides the necessary fastening strength. This is essential for maintaining the precise alignment and function of these components.

Aftertreatment and Exhaust Systems

In aftertreatment and exhaust recirculation systems, the screw secures components like the exhaust manifold and recirculation air plumbing. This ensures the system can handle high temperatures and pressures without component failure.

Rocker Lever and Support Structures

The screw is also used in rocker lever assemblies and support structures for alternators and thermostats. Its flange head design offers enhanced stability and resistance to vibration.

Upfit Kit Integration

Finally, in upfit kits, the Hexagon Flange Head Cap Screw is used to secure additional components or modifications to the engine system. This ensures that all added features are securely fastened, maintaining the overall integrity and performance of the engine.

Conclusion

The 3925402 Hexagon Flange Head Cap Screw is a critical component in the automotive and heavy-duty truck industry, particularly for Cummins engines. Its design and features ensure secure fastening of various engine components, contributing to the overall reliability and performance of the engine. Proper installation, maintenance, and troubleshooting practices are essential to maximize the lifespan and effectiveness of this Cummins part.