3609871
Studded Captive Washer Screw
Cummins®

The 3609871 Studded Captive Washer Screw is a specialized fastener produced by Cummins, a leading manufacturer in the commercial truck industry. This screw is designed for use in various applications within commercial trucks, ensuring secure and reliable fastening in demanding environments.

Basic Concepts

A Studded Captive Washer Screw is a type of fastener that includes a threaded stud, a captive washer, and a screw head. The threaded stud allows for secure attachment to a mating part, while the captive washer provides additional support and helps distribute the load. In a truck’s mechanical system, this type of screw is used to fasten components that require high strength and durability ¹.

Purpose and Role

The 3609871 Studded Captive Washer Screw plays a significant role in the operation of a truck by securely fastening critical components. It is commonly used in applications where vibration and dynamic loads are present, such as in the engine compartment, transmission, and chassis. This screw supports various systems by ensuring that parts remain firmly attached, reducing the risk of failure due to loosening ².

Key Features

The 3609871 Studded Captive Washer Screw features a robust design that includes a high-strength steel construction, ensuring durability under heavy loads. The captive washer is integrated into the screw, eliminating the need for separate washers and reducing the risk of loss during installation. Additionally, the screw is coated to provide corrosion resistance, enhancing its longevity in harsh environments ³.

Benefits

The use of the 3609871 Studded Captive Washer Screw offers several benefits. Its high-strength material and design contribute to improved performance and reliability in critical applications. The captive washer ensures consistent load distribution, while the corrosion-resistant coating extends the screw’s service life. These features also contribute to cost-effectiveness by reducing the need for frequent replacements and maintenance ⁴.

Installation Process

Proper installation of the 3609871 Studded Captive Washer Screw involves several steps. First, ensure that the mating surface is clean and free of debris. Use a torque wrench to tighten the screw to the manufacturer’s specified torque settings to avoid over-tightening, which can damage the threads or the captive washer. It is also important to verify that the screw is fully engaged and that the captive washer is properly seated.

Common Issues and Troubleshooting

Common issues with the 3609871 Studded Captive Washer Screw may include loosening due to vibration, corrosion, or damage to the threads. To address these issues, regularly inspect the screws for signs of wear or corrosion. If loosening is detected, re-tighten the screw to the specified torque. In cases of corrosion, consider replacing the screw to prevent further degradation. Damaged threads may require the use of a thread repair kit or replacement of the mating part.

Maintenance Tips

To ensure the longevity and optimal performance of the 3609871 Studded Captive Washer Screw, regular maintenance is recommended. Inspect the screws during routine service intervals for signs of wear, corrosion, or loosening. Clean the mating surfaces to remove any debris that could affect the screw’s performance. Applying a thread locker can also help prevent loosening in high-vibration environments.

Compatibility and Applications

The 3609871 Studded Captive Washer Screw is designed for use in a variety of commercial truck models. It is commonly applied in critical fastening applications within the engine, transmission, and chassis systems. Specific compatibility information and applications will be provided in a separate section.

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 for quality and reliability in the commercial truck industry. The company offers a wide range of products and services designed to meet the needs of customers in various industries, including transportation, construction, and agriculture.

Studded Captive Washer Screw in Cummins Engines

The Studded Captive Washer Screw, part number 3609871, is a critical component in several Cummins engine models, ensuring secure fastening and stability within the engine assembly. This part is integral to maintaining the integrity of various engine components, particularly in high-stress environments.

N14 Celect Plus Engine

In the N14 Celect Plus engine, the Studded Captive Washer Screw is utilized in several key areas. It is often found in the engine’s cylinder head, where it secures the head bolts. This ensures that the cylinder head is tightly fastened to the engine block, preventing leaks and maintaining proper compression. Additionally, this screw is used in the engine’s valve train, where it helps to secure various components, ensuring smooth and reliable operation.

The precision and durability of the Studded Captive Washer Screw are crucial in the N14 Celect Plus engine, which is known for its robust performance and reliability in demanding applications. The use of this part helps to maintain the engine’s structural integrity and operational efficiency over time.

Grouping of Engines

The Studded Captive Washer Screw is not limited to the N14 Celect Plus engine but is also used in other Cummins engine models. Its application in these engines follows similar principles, ensuring that critical components are securely fastened and that the engine operates smoothly and reliably. The use of this part across multiple engine models highlights its importance in maintaining engine performance and longevity.

Role of Part 3609871 Studded Captive Washer Screw in Turbocharger Plumbing

In the context of turbocharger plumbing, the 3609871 Studded Captive Washer Screw plays a significant role in ensuring the integrity and efficiency of the system. This component is specifically designed to secure various connections within the turbocharger plumbing, which includes the intercooler, wastegate, and blow-off valve systems.

When installed, the 3609871 Studded Captive Washer Screw provides a robust fastening solution that prevents leaks and maintains the pressure integrity of the plumbing lines. Its studded design allows for easy installation and removal, which is essential during maintenance or upgrades. The captive washer feature ensures that the washer remains in place, reducing the risk of loss and ensuring consistent sealing performance.

In the intercooler system, this screw is used to secure the connections between the intercooler core and the piping, ensuring that the cooled air is efficiently directed into the engine intake without any pressure drop. For the wastegate, it helps in maintaining the precise control of exhaust gas flow, which is vital for regulating boost pressure. In the blow-off valve system, the screw ensures that the valve operates smoothly, redirecting excess pressure away from the intake tract during throttle closure.

Overall, the 3609871 Studded Captive Washer Screw is an integral component in turbocharger plumbing, contributing to the reliability and performance of the entire system.

Conclusion

The 3609871 Studded Captive Washer Screw is a vital component in the commercial truck industry, providing secure and reliable fastening in demanding environments. Its robust design, high-strength material, and corrosion-resistant coating make it an essential part for various applications within Cummins engines and turbocharger plumbing systems. Regular maintenance and proper installation are key to ensuring the longevity and optimal performance of this critical fastener.