3349462
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by Part #3349462, is a specialized fastener produced by Cummins, a leading manufacturer in the automotive and heavy-duty truck industries. This part is integral to the assembly and maintenance of commercial trucks, providing secure fastening solutions that contribute to the overall reliability and performance of these vehicles.

Basic Concepts

Hexagon Flange Head Cap Screws are designed with a hexagonal head and a flange, which serves multiple functions within mechanical systems. The hexagonal head allows for efficient torque application using standard tools, ensuring secure fastening. The flange, a flat, circular plate at the base of the screw, distributes the load over a larger area, reducing the risk of damage to the fastened material. These screws are typically made from high-strength materials, such as alloy steel, to withstand significant stress and provide long-lasting performance ¹.

Purpose and Function

In the operation of a truck, the 3349462 Hexagon Flange Head Cap Screw plays a role in securing various components, ensuring structural integrity, and maintaining mechanical stability. It is commonly used in applications where a high degree of fastening security is required, such as in the attachment of engine components, chassis parts, and other critical assemblies. The screw’s design allows it to resist loosening under vibration and dynamic loads, which are common in heavy-duty truck environments ².

Key Features

The primary characteristics of the 3349462 Hexagon Flange Head Cap Screw include its hexagonal head design, which facilitates easy and secure tightening, and its flange feature, which enhances the distribution of clamping force and reduces the risk of surface damage. Additionally, its cap screw functionality allows for through-bolting applications, where the screw passes completely through the fastened materials and is secured with a nut on the opposite side. These features contribute to the screw’s effectiveness and reliability in demanding applications ³.

Benefits

The 3349462 Hexagon Flange Head Cap Screw offers several advantages, including enhanced fastening security due to its design, which resists loosening under vibration. Its ease of installation and removal is facilitated by the hexagonal head, which allows for straightforward torque application. Additionally, the flange provides a larger bearing surface, which can help prevent damage to the fastened materials and improve the overall stability of the assembly.

Troubleshooting and Maintenance

Common issues that may arise with Hexagon Flange Head Cap Screws include corrosion and stripping. To mitigate these problems, regular inspection and maintenance are recommended. This includes checking for signs of corrosion, especially in environments where the screws are exposed to moisture or chemicals, and ensuring that the correct torque specifications are used during installation to prevent over-tightening, which can lead to stripping. Applying a suitable anti-corrosion coating can also help extend the lifespan of the screws.

Cummins Overview

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 itself as a trusted name in the automotive industry, particularly in the diesel engine sector. The company is renowned for its commitment to quality, innovation, and customer satisfaction, providing reliable and high-performance products that meet the demanding requirements of commercial and industrial applications.

Cummins Hexagon Flange Head Cap Screw Part 3349462 in Engine Applications

The Cummins Hexagon Flange Head Cap Screw part number 3349462 is a critical component in the assembly and maintenance of several engine models. This screw is designed to provide secure fastening in various engine applications, ensuring that parts remain tightly connected under operational stresses.

QSC8.3 CM850 (CM2850) Engines

In the QSC8.3 CM850 (CM2850) engines, the part 3349462 is utilized in several key areas. It is often employed in securing engine covers, housings, and other structural components that require a robust and reliable fastening solution. The screw’s design allows it to withstand the high torque and operational stresses typical in these engines, ensuring longevity and performance.

QSM11 CM570 Engines

Similarly, in the QSM11 CM570 engines, the part 3349462 plays a crucial role in maintaining the integrity of engine assemblies. This screw is used in various applications where a strong and dependable fastening method is necessary. Its flange head design provides a larger surface area for torque application, which is essential for maintaining the structural integrity of the engine components.

Grouping of Engines

Both the QSC8.3 CM850 (CM2850) and QSM11 CM570 engines benefit from the use of the part 3349462 in their respective assemblies. The commonality in the use of this screw across these engines highlights its versatility and importance in ensuring the engines’ operational efficiency and durability. The screw’s design and material properties make it suitable for a wide range of applications within these engine models, providing a reliable fastening solution that meets the stringent demands of engine performance.

Role of Part 3349462 Hexagon Flange Head Cap Screw in Engine Systems

The part 3349462 Hexagon Flange Head Cap Screw is a versatile fastener that plays a significant role in securing various components within engine systems. Its design allows for efficient and reliable fastening, ensuring that components remain securely in place under operational conditions.

Aftercooler

In the aftercooler, the 3349462 Hexagon Flange Head Cap Screw is used to secure the mounting brackets and flanges. This ensures that the aftercooler is firmly attached to the engine structure, allowing for effective air cooling post-compression. The screw’s flange head provides additional surface area for a tighter seal, reducing the risk of vibrations and ensuring stable operation.

Heat Exchanger

Within the heat exchanger, this screw is employed to fasten the plates and frames that constitute the core of the exchanger. Its robust design helps maintain the integrity of the heat exchanger, ensuring efficient heat transfer between the fluids. The flange head offers enhanced torque application, which is essential for withstanding the thermal expansion and contraction cycles experienced during operation.

Raw Water Pump

The raw water pump utilizes the 3349462 Hexagon Flange Head Cap Screw to secure the pump housing and impeller. This fastening is vital for maintaining the pump’s structural integrity, especially under the high pressures and corrosive environments typical in marine or industrial applications. The screw’s design ensures a leak-proof seal, which is critical for the pump’s performance and longevity.

Turbocharger Arrangement

In turbocharger arrangements, the 3349462 Hexagon Flange Head Cap Screw is used to secure the turbocharger housing to the engine block or exhaust manifold. This application demands a fastener that can withstand high temperatures and pressures. The screw’s flange head provides additional stability, ensuring that the turbocharger remains securely attached, thereby optimizing its efficiency and reducing the risk of failure under extreme conditions.

Conclusion

The 3349462 Hexagon Flange Head Cap Screw is a critical component in the assembly and maintenance of commercial trucks and engines. Its design, featuring a hexagonal head and flange, ensures secure fastening, resistance to vibration, and efficient torque application. The screw’s use in various engine components, such as the aftercooler, heat exchanger, raw water pump, and turbocharger, underscores its versatility and importance in maintaining the operational efficiency and durability of these systems. Regular maintenance and proper installation techniques are essential to maximize the lifespan and performance of this Cummins part.