4349239
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, part number 4349239, manufactured by Cummins, is a specialized fastener designed for heavy-duty truck applications. This part is significant due to its role in securing various components and ensuring structural integrity within the vehicle. Its design and material properties make it suitable for the demanding conditions encountered in commercial trucking.

Basic Concepts and Functionality

The Hexagon Flange Head Cap Screw operates on fundamental principles of mechanical fastening. Its thread design allows it to create a secure connection between components by converting torque into clamping force. This Cummins part is typically made from high-strength materials, ensuring it can withstand significant loads and stresses. The thread profile is designed to provide optimal engagement with the mating part, enhancing the screw’s load-bearing capabilities ¹.

Purpose and Role in Truck Operation

In heavy-duty truck applications, the 4349239 Hexagon Flange Head Cap Screw serves to securely attach critical components such as engine mounts, transmission housings, and chassis structures. By maintaining proper alignment and preventing vibrations, the screw contributes to the overall stability and performance of the vehicle. Its role is vital in ensuring that components remain firmly in place under various operating conditions ².

Key Features

The 4349239 Hexagon Flange Head Cap Screw features a hexagonal head, which allows for efficient torque application using standard tools. The flange provides additional surface area, enhancing resistance to loosening and improving the screw’s overall stability. The cap configuration protects the screw from debris and environmental factors, contributing to its durability. The screw is typically made from materials that offer high tensile strength and resistance to corrosion, ensuring long-term performance in harsh environments.

Benefits

The 4349239 Hexagon Flange Head Cap Screw offers several advantages in heavy-duty truck applications. Its high tensile strength allows it to withstand significant loads, while its resistance to shear and fatigue ensures reliability under extreme conditions. The screw’s design facilitates efficient and secure fastening, reducing the risk of component failure or detachment. Additionally, its compatibility with various truck models enhances its versatility and contribution to overall vehicle reliability and performance.

Troubleshooting and Maintenance

Regular inspection and maintenance of the 4349239 Hexagon Flange Head Cap Screw are important to ensure optimal performance and longevity. Common issues such as loosening, corrosion, or damage should be addressed promptly. Torque checking and re-tightening procedures are recommended to maintain the screw’s effectiveness. Proper lubrication practices and the use of correct tools and techniques during installation and maintenance are also crucial. In cases where replacement or repair is necessary, it is important to follow manufacturer guidelines to avoid potential consequences of neglecting screw maintenance.

Cummins: Manufacturer Overview

Cummins Inc. is a leading manufacturer of diesel engines, natural gas engines, and related technologies, with a strong presence in the heavy-duty truck industry. The company is known for its commitment to quality, innovation, and customer satisfaction. Cummins offers an extensive product portfolio, including a wide range of fasteners and components specifically designed for heavy-duty truck applications. The company’s reputation for reliability, durability, and performance underscores its position as a trusted provider in the commercial trucking sector.

Hexagon Flange Head Cap Screw (Part 4349239) in Cummins Engines

The Hexagon Flange Head Cap Screw, identified by the part number 4349239, is a critical component in the assembly and maintenance of various Cummins engines. This particular screw is designed to secure and stabilize components within the engine structure, ensuring that parts remain firmly in place during operation.

Application in QSK95 Engines

In the QSK95 series engines, the 4349239 screw is utilized in several key areas. It is often employed in the fastening of engine covers and housings, providing a reliable connection that can withstand the high stresses and vibrations typical of engine operation. The precision engineering of this screw ensures that it maintains its integrity under the demanding conditions found in these engines.

Application in CM2350 Engines

For the CM2350 engines, the 4349239 screw is integral to the assembly of various internal and external components. Its use extends to securing engine mounts, brackets, and other structural elements that are essential for the engine’s overall stability and performance. The screw’s design allows for easy installation and removal, facilitating efficient maintenance procedures.

Application in K111 and K113 Engines

In the K111 and K113 engines, the 4349239 screw plays a pivotal role in the fastening of critical engine parts. Its application includes securing components that are exposed to high temperatures and pressures, ensuring that these parts remain securely attached throughout the engine’s operational life. The screw’s robust construction and precise dimensions make it an ideal choice for these demanding environments.

Grouping of Engines

The QSK95, CM2350, K111, and K113 engines, while distinct in their specific applications and configurations, share a commonality in their reliance on the 4349239 screw for critical fastening tasks. This grouping highlights the versatility and importance of the screw in maintaining the structural integrity and operational efficiency of these engines.

Role of Part 4349239 Hexagon Flange Head Cap Screw in Engine Systems

In the context of engine systems, the part 4349239 Hexagon Flange Head Cap Screw is instrumental in ensuring the secure assembly and reliable operation of various components.

Aftercooler

The aftercooler is a heat exchanger that cools the compressed air from the turbocharger before it enters the engine’s intake manifold. The Hexagon Flange Head Cap Screw is used to fasten the aftercooler to its mounting bracket, ensuring a stable and leak-free connection. This secure attachment is essential for maintaining the efficiency of the cooling process and preventing any potential air leaks that could compromise engine performance.

Housing

In engine systems, various components are often enclosed within housings to protect them from external elements and to contain any internal pressures. The Hexagon Flange Head Cap Screw plays a significant role in fastening these housings together. Whether it is the housing for the turbocharger, the intercooler, or other ancillary components, this screw ensures that the housing remains intact under operational stresses, thereby safeguarding the enclosed parts and maintaining system integrity.

Thermostat

The thermostat is a temperature-sensitive valve that regulates the flow of coolant through the engine, ensuring it operates within the optimal temperature range. The Hexagon Flange Head Cap Screw is utilized to secure the thermostat housing to the engine block or cylinder head. This secure fastening is vital for maintaining a sealed environment around the thermostat, preventing coolant leaks, and ensuring consistent temperature regulation, which is fundamental for engine efficiency and longevity ³.

Conclusion

The 4349239 Hexagon Flange Head Cap Screw is a critical component in heavy-duty truck applications, providing secure fastening and structural integrity in demanding environments. Its robust design, high tensile strength, and resistance to corrosion make it an essential part for maintaining the reliability and performance of various engine systems. Regular maintenance and proper installation practices are crucial to ensure the longevity and effectiveness of this Cummins part.