3680882
Captive Washer Cap Screw
Cummins®

The Captive Washer Cap Screw, identified by Part #3680882, is a component manufactured by Cummins, a well-established name in the automotive and heavy-duty truck industry. This screw is integral to the maintenance and operation of commercial trucks, providing a reliable means of securing various components and contributing to the overall structural integrity of the vehicle.

Basic Concepts

A Captive Washer Cap Screw is a type of fastener that includes an integrated washer, which is held captive by a slot or groove in the screw’s shank. This design ensures that the washer remains in place during installation, reducing the risk of loss and simplifying the assembly process. These screws are commonly used in mechanical assemblies where vibration resistance and a secure fit are required ¹.

Role in Truck Operation

The 3680882 Captive Washer Cap Screw plays a specific role in the operation and maintenance of commercial trucks. It is utilized to secure components that are subject to significant stress and vibration, such as engine mounts, chassis parts, and various brackets. By providing a stable and vibration-resistant connection, this screw helps maintain the structural integrity of the truck, ensuring that components remain securely in place under operating conditions ².

Key Features

The 3680882 Captive Washer Cap Screw is characterized by several key features that enhance its performance and durability. Its design includes a captive washer that is held in place by a slot or groove, ensuring that the washer does not become dislodged during installation. The screw is typically made from high-strength materials, such as alloy steel, which provides excellent resistance to wear and corrosion. Additionally, the screw may feature a coating or treatment to further enhance its durability and resistance to environmental factors ³.

Benefits

Using the 3680882 Captive Washer Cap Screw offers several advantages for fleet operators. The integrated washer simplifies the installation process, reducing the time and labor required for assembly. The screw’s design and material composition contribute to improved reliability, ensuring a secure and lasting connection. Furthermore, the durability of the screw can lead to long-term cost savings by reducing the need for frequent replacements and maintenance ⁴.

Troubleshooting and Maintenance

Common issues with Captive Washer Cap Screws may include loosening due to vibration or corrosion. Regular inspection and maintenance are recommended to ensure optimal performance and longevity. If a screw appears loose or shows signs of corrosion, it should be tightened or replaced as necessary. Additionally, applying a thread locker or anti-seize compound can help prevent loosening and corrosion, respectively.

About Cummins

Cummins 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 reputation for producing high-quality automotive components. The company is committed to innovation, sustainability, and customer satisfaction, making it a trusted partner in the automotive and heavy-duty truck industries.

Compatibility with Cummins Engines

This Cummins part is designed to fit seamlessly with a variety of Cummins engines. Below is a detailed look at the compatibility of this part with various Cummins engine models.

ISX Series Engines

• ISX CM570
• ISX CM870
• ISX CM871

The 3680882 is compatible with the ISX series engines, including the ISX CM570, ISX CM870, and ISX CM871. This part ensures that critical components are held firmly in place, contributing to the overall reliability and performance of these engines.

ISX15 Series Engines

• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101

For the ISX15 series, the 3680882 fits the ISX15 CM2250, ISX15 CM2250 SN, and ISX15 CM2350 X101 engines. This screw is essential for maintaining the structural integrity of these engines, ensuring that all parts are securely fastened.

QSX15 Series Engines

• QSX15 CM2250
• QSX15 CM2250 ECF
• QSX15 CM2350 X105

The QSX15 series engines, including the QSX15 CM2250, QSX15 CM2250 ECF, and QSX15 CM2350 X105, also benefit from the use of the 3680882. This part is designed to provide the necessary fastening for these engines, ensuring optimal performance and longevity.

X15 Series Engines

• X15 CM2350 X116B
• X15 CM2350 X123B
• X15 CM2450 X134B

Lastly, the X15 series engines, such as the X15 CM2350 X116B, X15 CM2350 X123B, and X15 CM2450 X134B, are compatible with the 3680882. This part is vital for the assembly and operation of these engines, providing the necessary fastening to keep all components in place.

Role of Part 3680882 in Engine Systems

The 3680882 is integral to the assembly and securement of various components within engine systems. Its application ensures the stability and integrity of the assembly by providing a reliable fastening solution.

Cylinder Block

In the cylinder block, the 3680882 is used to fasten various components such as brackets, sensors, and auxiliary parts. This screw ensures that these components remain securely attached to the cylinder block, which is essential for maintaining the structural integrity and operational efficiency of the engine. The captive washer feature prevents the screw from loosening over time, which is particularly important in the high-vibration environment of an engine.

Front Gear Housing

For the front gear housing, the 3680882 plays a significant role in securing the housing to the engine frame or other supporting structures. This is vital for maintaining the alignment and stability of the gear housing, which houses critical components such as gears, shafts, and bearings. The secure fastening provided by this screw helps in reducing the risk of misalignment or movement that could lead to increased wear or failure of the gear components.

The use of the captive washer also ensures that the screw remains in place during maintenance or repair operations, simplifying the reassembly process and reducing the likelihood of losing small components.

Conclusion

The 3680882 Captive Washer Cap Screw is a critical component in the maintenance and operation of commercial trucks and Cummins engines. Its design, featuring an integrated captive washer, ensures secure fastening and simplifies the assembly process. The screw’s high-strength material and potential coatings enhance its durability and resistance to environmental factors, offering long-term benefits for fleet operators. Regular maintenance and the use of appropriate compounds can further ensure the screw’s longevity and performance.