4096719
Captive Washer Cap Screw
Cummins®

The Captive Washer Cap Screw, part number 4096719, manufactured by Cummins, is a specialized fastener designed for use in commercial trucks. Cummins, a well-established name in the commercial truck industry, produces a range of components that enhance the performance and reliability of heavy-duty vehicles. This Cummins part is integral to various truck assemblies, ensuring secure and efficient mechanical connections.

Basic Concepts of Captive Washer Cap Screws

A Captive Washer Cap Screw is a type of fastener that includes an integrated washer, which is held in place by a protrusion or step on the screw’s shank ¹. This design ensures that the washer remains attached to the screw during installation, reducing the risk of loss and simplifying the assembly process. These screws are commonly used in mechanical assemblies where sealing, vibration resistance, and ease of installation are important ².

Purpose of the 4096719 Captive Washer Cap Screw in Truck Operation

This part plays a role in the operation and maintenance of commercial trucks by providing secure fastening in various assemblies. It is particularly useful in applications where vibration and dynamic loads are present, as the integrated washer helps to distribute pressure evenly and prevent loosening. This screw is often used in engine components, chassis parts, and other critical areas where reliable fastening is required ³.

Key Features

The 4096719 Captive Washer Cap Screw features a robust design that includes an integrated washer held in place by a step on the screw’s shank. It is typically made from high-strength materials such as alloy steel, which provides excellent durability and resistance to wear. The screw’s threading is designed to ensure a tight and secure fit, while the washer enhances sealing capabilities and load distribution.

Benefits

Using the 4096719 Captive Washer Cap Screw offers several benefits. The integrated washer simplifies the installation process by eliminating the need for separate washers, which can be prone to loss or misplacement. This design also enhances sealing capabilities, reducing the risk of leaks in fluid systems. Additionally, the screw’s robust construction provides increased resistance to vibration and loosening, ensuring long-term reliability in demanding truck applications.

Installation Process

Proper installation of the 4096719 Captive Washer Cap Screw involves several steps to ensure a secure and effective fit. Begin by cleaning the installation area to remove any debris or contaminants. Use a torque wrench to tighten the screw to the manufacturer’s specified torque settings, ensuring that it is neither over-tightened nor under-tightened. It is also important to verify that the integrated washer is properly seated and that the screw is perpendicular to the surface to which it is being attached.

Troubleshooting and Maintenance

Common issues with the 4096719 Captive Washer Cap Screw may include loosening due to vibration or corrosion over time. To address these issues, regularly inspect the screw and surrounding area for signs of wear or damage. If corrosion is present, clean the affected area and apply a suitable corrosion-resistant coating. To prevent loosening, ensure that the screw is properly torqued during installation and consider using a thread-locking compound in applications where vibration is a concern. Regular maintenance and inspection will help prolong the service life of the screw and ensure optimal performance.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation for quality, innovation, and reliability in the commercial truck industry. The company’s commitment to advancing technology and meeting the needs of its customers is evident in its diverse product range, which includes engines, powertrains, and aftermarket parts designed to enhance the performance and durability of commercial vehicles.

Cummins Engine Part 4096719: Captive Washer Cap Screw

The Captive Washer Cap Screw, part number 4096719, manufactured by Cummins, is a critical component in several of their engine models. This part is integral to the assembly and operation of the engines, ensuring secure fastening and stability.

Application in Cummins Engines

QSB4.5 Series

• QSB4.5 CM850 (CM2850)
• QSB4.5 CM875 (CM2875)

In the QSB4.5 series, the Captive Washer Cap Screw is used in various applications to maintain the integrity of engine components. This includes securing engine mounts, attaching brackets, and fastening other critical parts. The design of the screw ensures that the washer remains captive, preventing loss during assembly and ensuring a reliable connection.

QS6 Series

• QS6.7 CM870 (CM2870)

The QS6.7 CM870 (CM2870) engine also utilizes the Captive Washer Cap Screw for similar purposes. This part is essential in maintaining the structural integrity of the engine by providing a secure fastening mechanism for various engine components.

QSK Series

• QSK19 CM870 (CM2870)

In the QSK19 CM870 (CM2870) engine, the Captive Washer Cap Screw is employed to secure critical engine parts, ensuring that the engine operates smoothly and efficiently. The screw’s design, with the captive washer, provides an added layer of security, reducing the risk of loosening over time.

Importance of the Captive Washer Cap Screw

The Captive Washer Cap Screw is a vital component in Cummins engines, ensuring that all fastened parts remain securely in place. This is crucial for the overall performance and longevity of the engine. The captive washer design prevents the washer from being lost during assembly, ensuring that the screw maintains its intended function throughout the engine’s operational life.

Role of Part 4096719 Captive Washer Cap Screw in Engine Systems

In the intricate assembly of engine systems, the 4096719 Captive Washer Cap Screw serves as a pivotal fastening element, ensuring the secure attachment of various components. Its application spans across multiple engine subsystems, contributing to the overall integrity and functionality of the engine.

Housing and Mounting Components

The 4096719 screw is instrumental in the secure attachment of the housing to the engine block. This includes the fastening of the flywheel housing, which is essential for the smooth operation of the flywheel. Additionally, it is used in the mounting of the alternator, ensuring that this vital component remains firmly in place, thereby maintaining consistent electrical output.

Engine Control Module (ECM) and Plumbing

In the realm of engine control, the 4096719 screw plays a role in securing the Engine Control Module (ECM) to its designated location. This ensures that the ECM remains stable and unaffected by vibrations, which is essential for accurate engine management. Furthermore, in plumbing applications, this screw is utilized to secure various plumbing components, ensuring leak-free connections and maintaining the integrity of fluid systems within the engine.

Turbocharger and Turbocharger Kit

The integration of a turbocharger or turbocharger kit into an engine system often requires robust fastening solutions. The 4096719 screw is employed in these applications to secure the turbocharger to the engine, ensuring that it operates under optimal conditions. Its use in turbocharger kits further exemplifies its versatility and reliability in high-stress environments.

Through its application in these diverse components, the 4096719 Captive Washer Cap Screw demonstrates its significance in maintaining the structural and operational integrity of engine systems.

Conclusion

The 4096719 Captive Washer Cap Screw is a critical component in the assembly and operation of Cummins engines, ensuring secure fastening and stability across various engine subsystems. Its robust design, featuring an integrated washer, simplifies installation and enhances sealing capabilities, making it an essential part for maintaining the performance and longevity of commercial trucks.