3947358
Studded Flange Cap Screw
Cummins®

The Studded Flange Cap Screw, identified by Part #3947358, is a component manufactured by Cummins, a well-established name in the automotive and heavy-duty truck industry. This screw is integral to the mechanical systems of heavy-duty trucks, providing a secure fastening solution for various applications. Its design and functionality are tailored to meet the demanding requirements of truck operations, ensuring reliability and efficiency in performance ¹.

Basic Concepts

A Studded Flange Cap Screw is a type of fastener that consists of a threaded stud with a flange at one end and a cap screw at the other. The flange provides a broad surface area for distribution of clamping force, while the threaded stud allows for secure attachment into a corresponding threaded hole. Within a truck’s mechanical system, this screw is used to connect flanges and other components, ensuring a tight and stable connection that can withstand significant stress and vibration ².

Purpose and Role

The Studded Flange Cap Screw plays a significant role in the operation of a truck by securing flanges and other critical components. Its application is particularly important in areas where vibrations and dynamic loads are common, as it helps maintain the integrity of connections under such conditions. By providing a secure and stable attachment, this screw contributes to the overall safety and performance of the truck ³.

Key Features

The 3947358 Studded Flange Cap Screw is characterized by several key features that enhance its performance and durability. These include its material composition, which is typically a high-strength alloy designed to resist corrosion and wear. The threading type is another critical aspect, ensuring a secure fit and easy installation. Additionally, the design specifications of the screw, such as the flange size and shape, are optimized to distribute clamping force effectively and prevent loosening over time.

Benefits

Utilizing a Studded Flange Cap Screw in truck maintenance and operation offers several advantages. These include improved security of connections, enhanced durability under demanding conditions, and ease of installation. The design of the screw allows for quick and efficient fastening, reducing downtime during maintenance procedures. Furthermore, its robust construction ensures long-term reliability, minimizing the need for frequent replacements.

Installation Process

Proper installation of the Studded Flange Cap Screw involves several steps to ensure a secure and lasting connection. Begin by cleaning the mating surfaces to remove any debris or contaminants. Next, align the screw with the corresponding threaded hole and start threading it in by hand to avoid cross-threading. Once the screw is partially engaged, use a torque wrench to tighten it to the manufacturer’s specified torque setting. This ensures the screw is tightened to the correct tension without over-tightening, which could damage the threads or the component being fastened.

Troubleshooting and Maintenance

Common issues with Studded Flange Cap Screws may include loosening over time due to vibration or corrosion. Regular inspection and maintenance can help identify and address these problems early. If a screw appears loose, it should be re-tightened to the specified torque setting. In cases of corrosion, the affected area should be cleaned, and the screw may need to be replaced if damage is significant. Applying a thread locker can also help prevent loosening in high-vibration environments.

Safety Considerations

When working with Studded Flange Cap Screws, it is important to observe several safety guidelines and precautions. Always wear appropriate protective equipment, such as gloves and safety glasses, to protect against injury. Use the correct tools for installation and removal to avoid damaging the screw or the component. Adhere to the manufacturer’s torque specifications to prevent over-tightening, which can lead to thread damage or component failure. Additionally, ensure the work area is clean and free of debris to avoid contamination of the mating surfaces.

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 a strong reputation in the automotive and heavy-duty truck industry for producing reliable and high-performance components. The company’s product range includes engines, powertrain components, and aftermarket parts, all designed to meet the rigorous demands of commercial and industrial applications. Cummins’ commitment to innovation and quality has made it a trusted name among professionals in the field.

Studded Flange Cap Screw (Part 3947358) in Cummins Engines

The Studded Flange Cap Screw, part number 3947358, manufactured by Cummins, is a critical component in various Cummins engines, ensuring secure fastening and stability. This part is designed to fit seamlessly with specific engine models, providing robust performance and reliability.

ISB Series

The ISB engines, including the ISB CM2150 and ISB CM850, utilize the Studded Flange Cap Screw for fastening components that require high strength and durability. These engines are known for their efficiency and power, and the studded flange cap screw plays a vital role in maintaining the integrity of the engine’s structure.

ISL G Series

In the ISL G CM2180 engine, the Studded Flange Cap Screw is essential for securing various parts, ensuring that the engine operates smoothly under heavy loads. This engine is designed for demanding applications, and the use of this screw helps in maintaining the structural integrity and performance of the engine.

QSB Series

For the QSB4.5 CM2250 EC and QSB5.9 CM850 engines, the Studded Flange Cap Screw is used in critical applications where high torque and durability are necessary. These engines are built for durability and reliability, and the studded flange cap screw ensures that all components are securely fastened, contributing to the overall performance and longevity of the engine.

The Studded Flange Cap Screw is a testament to Cummins’ commitment to quality and precision in engine manufacturing, ensuring that each component works in harmony to deliver optimal performance.

Role of Part 3947358 Studded Flange Cap Screw in Engine Systems

The Part 3947358 Studded Flange Cap Screw is instrumental in ensuring the secure and reliable assembly of various components within engine systems. Its application spans across multiple critical areas, facilitating the integration and functionality of these parts.

Connection and Air Intake Systems

In air intake systems, the Studded Flange Cap Screw is used to fasten the air filter housing to the intake manifold. This secure connection ensures that the air filter remains in place, preventing any air leaks that could affect engine performance. Additionally, it helps in maintaining the integrity of the air intake path, ensuring that the engine receives a consistent airflow.

Fuel System Integration

Within the fuel system, the Studded Flange Cap Screw plays a significant role in attaching the fuel filter to the fuel lines. This secure attachment is vital for maintaining the fuel flow and preventing any potential leaks. It also ensures that the fuel filter is properly positioned, allowing for efficient filtration of contaminants before the fuel reaches the engine.

Hardware Kit and Module Mounting

When it comes to hardware kits, the Studded Flange Cap Screw is often utilized for mounting various modules, such as the Engine Control Module (ECM) and Fuel Control Module (FCM). These modules require a stable and vibration-resistant mounting solution to function correctly. The screw ensures that these modules are securely fastened to the engine or chassis, protecting them from damage due to engine vibrations.

Alternator and Oil Pan Applications

In alternator applications, the Studded Flange Cap Screw is used to attach the alternator to the engine block or mounting bracket. This secure connection is essential for the alternator’s stable operation and efficient power generation. Similarly, in oil pan applications, the screw is employed to fasten the oil pan to the engine block, ensuring a leak-proof seal and protecting the engine’s lubricating oil.

Plumbing and Exhaust Recirculation

For plumbing applications, the Studded Flange Cap Screw is used in various fluid transfer systems within the engine, such as coolant and oil lines. It ensures that these lines are securely connected, preventing leaks and maintaining the efficiency of the engine’s cooling and lubrication systems. In exhaust recirculation systems, the screw is used to attach the Exhaust Gas Recirculation (EGR) valve to the engine, ensuring that the valve operates within the designed parameters to reduce emissions.

Valve Cover and Manifold Attachments

The Studded Flange Cap Screw is also crucial in attaching the valve cover to the cylinder head, ensuring a tight seal that prevents oil leaks and maintains proper engine lubrication. Additionally, it is used in manifold attachments, securing the intake and exhaust manifolds to the engine block, which is essential for maintaining the engine’s air and exhaust flow efficiency.

Conclusion

In summary, the Part 3947358 Studded Flange Cap Screw is a versatile component that enhances the reliability and performance of various engine systems by providing secure and stable connections across multiple applications. Its robust design and high-strength material composition make it an essential part in the assembly and maintenance of heavy-duty engines, contributing to the overall efficiency and durability of the vehicle.