4325676
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 4325676, is a component manufactured by Cummins. This screw is significant in the realm of commercial trucks due to its role in securing various components and ensuring structural integrity. Cummins, a reputable manufacturer in the automotive industry, produces this part with a focus on quality and reliability ³.

Basic Concepts

Hexagon Flange Head Cap Screws are designed with a hexagonal head, a flange, and a threaded shank. 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 pulling through the material. These screws are typically made from materials such as alloy steel, which offer high tensile strength and resistance to wear and corrosion ¹. In the automotive industry, they are commonly used to fasten metal components, ensuring both strength and durability in various applications.

Functionality and Operation

Within the context of a commercial truck, the Hexagon Flange Head Cap Screw operates by securing components together under significant stress. Its design allows it to distribute loads evenly across the flange, which helps in maintaining the structural integrity of the assembly. The screw’s threaded shank engages with the internal threads of a nut or directly into a tapped hole, creating a strong and reliable connection ².

Purpose of the 4325676 Hexagon Flange Head Cap Screw

This Cummins part plays a specific role in the operation of a truck by securing critical components and assemblies. It is used in various truck systems where high strength and resistance to loosening are required. This screw ensures that components remain firmly in place, even under dynamic loads and vibrations commonly experienced in commercial truck operations.

Key Features

The primary characteristics of the 4325676 Hexagon Flange Head Cap Screw include its hexagonal head design, which facilitates easy and efficient torque application. The flange feature provides an additional bearing surface, enhancing the screw’s ability to distribute loads and prevent pull-through. Additionally, its cap screw functionality allows for direct engagement with internal threads, ensuring a secure and robust connection.

Benefits

This part offers several advantages. Its design enhances fastening strength, making it suitable for applications where high tensile loads are present. The flange feature provides resistance to loosening, ensuring that the connection remains secure over time. Furthermore, the screw’s ease of installation and removal simplifies maintenance procedures, allowing for quick and efficient component changes when necessary.

Installation and Usage

Proper installation of the 4325676 Hexagon Flange Head Cap Screw involves using the recommended torque settings to ensure optimal performance. It is important to use the correct tools to apply torque evenly, avoiding over-tightening which can lead to damage, or under-tightening which can compromise the connection. Best practices include cleaning the mating surfaces before installation to remove any debris that could affect the screw’s performance ⁴.

Troubleshooting and Maintenance

Common issues with the 4325676 Hexagon Flange Head Cap Screw may include loosening or corrosion. To address loosening, it is important to periodically check the torque settings and re-tighten as necessary. Corrosion can be mitigated by using screws made from corrosion-resistant materials and applying protective coatings where applicable. Regular inspection and maintenance will help prolong the lifespan of the screw and ensure continued reliable performance.

Cummins Overview

Cummins is a well-established manufacturer in the automotive industry, known for its commitment to quality and innovation. With a history of producing reliable and high-performance components, Cummins has built a reputation for excellence. The company’s focus on research and development ensures that its products, including the 4325676 Hexagon Flange Head Cap Screw, meet the demanding requirements of commercial truck applications ³.

Cummins Hexagon Flange Head Cap Screw 4325676 in Engine Applications

The Cummins Hexagon Flange Head Cap Screw, part number 4325676, is a critical component in various engine systems, ensuring secure fastening and reliable performance. This part is integral to the assembly and maintenance of several engines, including those from the ISV (Intelligent Systems Vehicle) lineup by Nissan.

ISV (Nissan) Engines

In the ISV engines, the 4325676 screw is utilized in several key areas:

• Cylinder Head Assembly: This screw is often used to secure the cylinder head to the engine block, ensuring a tight seal and preventing leaks.
• Valve Cover Fastening: It is also employed in fastening the valve cover, which protects the internal components of the engine from debris and environmental factors.
• Turbocharger Mounting: In turbocharged engines, this screw can be found in the mounting brackets for the turbocharger, ensuring stability and efficiency.

The precision engineering of the 4325676 screw ensures that it can withstand the high stresses and temperatures typical in engine environments, contributing to the overall durability and performance of the engine ⁴.

Hexagon Flange Head Cap Screw in Turbocharger Systems

In turbocharger systems, the part 4325676 Hexagon Flange Head Cap Screw is employed to secure various components, ensuring the system operates efficiently and reliably.

Compressor Housing Assembly

Within the compressor housing assembly, this screw is used to fasten the compressor cover to the compressor wheel. This secure attachment is essential for maintaining the structural integrity of the assembly, allowing the compressor to function optimally by compressing the incoming air efficiently.

Turbine Housing Assembly

In the turbine housing assembly, the Hexagon Flange Head Cap Screw is utilized to attach the turbine cover to the turbine wheel. This secure connection ensures that the turbine can withstand the high-speed rotation and thermal stresses, contributing to the overall durability and performance of the turbocharger.

Bearing Housing

The screw is also integral in the bearing housing, where it helps to secure the bearing caps. Proper fastening of these caps is vital for maintaining the precise alignment and smooth operation of the turbocharger’s rotating components, which is necessary for minimizing friction and wear.

Wastegate Actuator

In systems equipped with a wastegate, the Hexagon Flange Head Cap Screw is used to attach the wastegate actuator to the turbocharger housing. This secure attachment ensures that the wastegate can modulate the exhaust flow effectively, helping to control the turbocharger’s speed and prevent overboosting.

Charge Air Cooler (CAC) Attachment

For turbochargers integrated with a charge air cooler (CAC), this screw is employed to secure the CAC to the turbocharger housing. This ensures a tight seal and proper alignment, which is important for efficient heat exchange and optimal air cooling before it enters the engine.

Exhaust Manifold Connection

Finally, the Hexagon Flange Head Cap Screw is used in connecting the turbocharger to the exhaust manifold. This secure connection is essential for maintaining a sealed exhaust path, which is necessary for efficient turbocharger operation and overall engine performance.

Conclusion

The 4325676 Hexagon Flange Head Cap Screw is a vital component in the automotive industry, particularly in commercial trucks and engine applications. Its design and material properties ensure reliable performance under high stress and dynamic conditions. Proper installation and maintenance are crucial to maximizing its benefits and ensuring the longevity and efficiency of the systems it supports.