3065944
Captive Washer Cap Screw
Cummins®

Captive washer cap screws are integral components in the maintenance and operation of commercial trucks. They provide secure fastening solutions that are vital for the integrity and safety of various truck assemblies. This discussion focuses on the Cummins Part #3065944, a specific type of captive washer cap screw designed for robust performance in demanding environments.

Basic Concepts of Captive Washer Cap Screws

Captive washer cap screws are fasteners that incorporate a washer directly into the screw head or shank. This design ensures that the washer remains in place during installation, reducing the risk of loss and ensuring consistent torque application. These screws are commonly used in mechanical assemblies where vibration and movement are prevalent, as they help maintain a secure connection over time ¹.

Purpose of the 3065944 Captive Washer Cap Screw

The Cummins Part #3065944 Captive Washer Cap Screw is designed to play a specific role in truck operations. It is utilized in areas where secure and reliable fastening is required, such as in engine components, chassis assemblies, and other critical truck systems. The screw’s design helps in distributing load evenly, reducing the stress on the fastened materials, and providing a stable connection that can withstand the rigors of commercial truck use ².

Key Features

The 3065944 Captive Washer Cap Screw boasts several key features that enhance its performance. It is made from high-quality materials, typically a grade of steel that offers excellent strength and corrosion resistance. The screw’s design includes a hex head for easy installation using common tools, and the integrated washer ensures consistent pressure distribution. Additionally, the screw may feature a coating or treatment to further protect against environmental factors, extending its service life ³.

Benefits

Using the 3065944 Captive Washer Cap Screw offers several advantages. Its durable construction ensures long-term reliability, reducing the need for frequent replacements. The integrated washer simplifies the installation process, saving time and labor. Moreover, the screw’s design contributes to easier maintenance, as it minimizes the risk of washer loss and ensures consistent torque application, which is crucial for the longevity and performance of truck assemblies.

Troubleshooting and Maintenance

Common issues with captive washer cap screws may include loosening due to vibration or corrosion. Regular inspection and tightening can help mitigate these problems. If corrosion is detected, it may be necessary to replace the screw to prevent further degradation. Proper torque settings should be followed during installation to ensure the screw is neither overtightened nor under-tightened, which can lead to failure. Additionally, keeping the screw and surrounding areas clean and free of contaminants can enhance performance and longevity.

About Cummins

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 is committed to quality, innovation, and customer satisfaction. The company’s extensive product range includes engines, components, and technologies that power a variety of applications, from commercial trucks to industrial equipment. Cummins’ dedication to excellence is evident in their rigorous testing and quality control processes, ensuring that their products meet the highest standards of performance and reliability.

Compatibility with Cummins Engines

The Captive Washer Cap Screw part number 3065944, manufactured by Cummins, is a critical component used in various Cummins engine models. This part is designed to secure and stabilize different parts within the engine assembly, ensuring that components remain firmly in place under operational conditions.

Compatibility with Cummins Engines

6C Series Engines:

• 6C8.3

ISM Series Engines:

• ISM CM570
• ISM CM570/870
• ISM CM876
• ISM11 CM876 SN

ISX Series Engines:

• ISX CM570
• ISX CM870
• ISX CM871

K Series Engines:

• K19
• K38
• K50

L Series Engines:

• L10 CELECT
• L10 MECHANICAL
• L8.9 L121
• L9.5 L117

M Series Engines:

• M11 CELECT
• M11 CELECT PLUS
• M11 MECHANICAL

N Series Engines:

• N14 CELECT
• N14 CELECT PLUS
• N14 MECHANICAL

Other Engines:

• 4B3.9
• 6B5.9
• NH/NT 855

This captive washer cap screw is integral to the assembly and maintenance of these engines, ensuring that all parts are securely fastened and aligned. Its use across a wide range of Cummins engine models underscores its versatility and importance in maintaining engine integrity and performance.

Role of Part 3065944 Captive Washer Cap Screw in Engine Systems

The part 3065944 Captive Washer Cap Screw is integral to the assembly and functionality of various components within engine systems. Its application ensures secure fastening and reliable operation across multiple subsystems.

Fuel System Components

In the fuel shutoff valve arrangement and fuel shutoff valve kit, the Captive Washer Cap Screw secures the shutoff mechanism, ensuring that the valve operates correctly under varying fuel pressures. It also plays a role in the fuel(top level assembly) manifold, where it maintains the integrity of connections between the manifold and other fuel system components.

For the fuel base pump and fuel pump mounting, this screw is used to fasten the pump securely to its mounting bracket, ensuring stability and preventing vibrations that could affect fuel delivery. In the fuel manifold and injection starting aid, it helps in maintaining the structural integrity of these components, which is essential for consistent fuel injection and engine starting performance.

Electronic and Control Systems

Within the electronic step (24v) kit and modified centry (12v/24v) kits, the Captive Washer Cap Screw is employed to secure electronic components and wiring harnesses. This ensures that electrical connections remain stable and unaffected by engine vibrations.

In the pace module and performance parts, it is used to fasten control modules and sensors, guaranteeing that these critical components remain in place and function correctly. The screw also finds use in the rapid restart system, where it secures components that facilitate quick engine restarts, enhancing overall engine reliability.

Valve and Solenoid Assemblies

For the ebm-injector and ebm-valve, the Captive Washer Cap Screw ensures that these components are tightly secured, which is vital for precise fuel injection and valve operation. In the shutoff valve and solenoid assemblies, it maintains the structural integrity needed for reliable operation under high-pressure conditions.

Additional Applications

The screw is also utilized in the timing control valve and hvt check valve, where it secures valve components, ensuring they function within specified parameters. In the step control mounting and tubing connections, it provides the necessary fastening to maintain the alignment and integrity of these components.

Overall, the part 3065944 Captive Washer Cap Screw is a versatile fastener that enhances the reliability and performance of various engine system components.

Conclusion

The Cummins Part #3065944 Captive Washer Cap Screw is a critical component in the maintenance and operation of commercial trucks and various Cummins engine models. Its design ensures secure fastening, consistent torque application, and long-term reliability. The screw’s compatibility with a wide range of engine models underscores its versatility and importance in maintaining engine integrity and performance. Regular maintenance and proper installation practices are essential to maximize the benefits of this part.