3687127
Studded Captive Washer Screw
Cummins®

The Studded Captive Washer Screw (Part #3687127) is a component manufactured by Cummins, designed for use in commercial trucks. This article provides an overview of the Studded Captive Washer Screw, its function, key features, benefits, and maintenance suggestions.

Basic Concepts

A Studded Captive Washer Screw is a type of fastener that incorporates a washer with studs or projections. This design allows the washer to remain captive to the screw, preventing loss during installation and providing enhanced sealing and load distribution capabilities ¹.

Function and Role in Truck Operation

The 3687127 Studded Captive Washer Screw plays a role in securing components within the truck’s engine and chassis systems. It ensures a tight and reliable connection between parts, contributing to the overall structural integrity and performance of the vehicle ².

Key Features

• Captive washer design prevents loss during installation.
• Studded washer provides improved sealing and load distribution.
• Manufactured to high standards for durability and reliability.
• Compatible with specific Cummins engine and chassis components.

Benefits

• Enhanced sealing reduces the risk of leaks.
• Improved load distribution minimizes stress on connected parts.
• Simplifies installation process by keeping the washer attached to the screw.
• Contributes to the longevity and reliability of truck components ³.

Troubleshooting and Maintenance

Regular inspection of the Studded Captive Washer Screw is recommended to ensure it remains securely fastened and shows no signs of wear or damage. If corrosion or excessive wear is observed, replacement may be necessary to maintain the integrity of the connection. Proper torque specifications should be followed during installation to avoid over-tightening or under-tightening ⁴.

Cummins Engine Compatibility with Part 3687127

The Studded Captive Washer Screw, part number 3687127, manufactured by Cummins, is a critical component in the assembly and maintenance of various Cummins engines. This part is integral to ensuring the secure fastening of components, thereby maintaining the structural integrity and operational efficiency of the engines.

ISM and QSM Series

The ISM CM876 and QSM11 CM876 engines are part of the ISM and QSM series, respectively. These engines are known for their robust performance and reliability in heavy-duty applications. The Studded Captive Washer Screw is used in these engines to secure various components, ensuring that the engine’s internal parts remain tightly fastened and properly aligned.

ISX Series

The ISX engines, including the ISX CM871, ISX15 CM2250, ISX15 CM2250 SN, ISX15 CM2350 X101, and ISX15 CM2350 X105, are part of the ISX series. These engines are designed for high-performance applications and are widely used in various industries. The Studded Captive Washer Screw is essential in these engines for securing components such as the cylinder head, intake manifold, and exhaust manifold, ensuring that these parts remain securely fastened under high-stress conditions.

QSX Series

The QSX engines, including the QSX15 CM2250, QSX15 CM2250 ECF, and QSX15 CM2350 X105, are part of the QSX series. These engines are known for their durability and efficiency. The Studded Captive Washer Screw is used in these engines to secure components such as the turbocharger, intercooler, and other critical parts, ensuring that these components remain tightly fastened and properly aligned.

X15 Series

The X15 engines, including the X15 CM2350 X116B, X15 CM2350 X123B, and X15 CM2450 X134B, are part of the X15 series. These engines are designed for heavy-duty applications and are known for their reliability and performance. The Studded Captive Washer Screw is used in these engines to secure various components, ensuring that the engine’s internal parts remain tightly fastened and properly aligned.

Each of these engines relies on the Studded Captive Washer Screw to maintain the integrity of their assemblies, ensuring that all components are securely fastened and properly aligned. This part is essential for the reliable operation and longevity of the engines, making it a critical component in the maintenance and assembly of Cummins engines.

Role of Part 3687127 Studded Captive Washer Screw in Engine Systems

In the intricate network of an engine system, the Studded Captive Washer Screw plays a significant role in ensuring the seamless operation of various components. This component is integral in the assembly and maintenance of several key engine parts.

Cooler Systems

Within cooler systems, particularly those designed for engine oil and lubricating oil, the Studded Captive Washer Screw is employed to secure the connections between the cooler and the plumbing. Its design allows for a tight and reliable seal, which is essential for the efficient transfer of heat away from the oil, thereby maintaining optimal operating temperatures.

Filtration and Lubrication

In the context of engine oil filters, this screw component is used to attach the filter housing to the engine block. This secure attachment is vital for the filtration process, ensuring that contaminants are effectively removed from the oil, which in turn protects the engine’s moving parts from wear and damage.

For lubricating oil systems, the Studded Captive Washer Screw is often found in the connections between the oil pump and the various lubrication points throughout the engine. Its role here is to ensure a consistent flow of oil, which is necessary for reducing friction and wear on critical engine components.

Fuel Management

In fuel drain and recirculation systems, this screw is utilized to connect the fuel lines and components. It ensures that fuel is properly directed and managed within the system, contributing to efficient fuel consumption and reduced emissions.

Exhaust Systems

Lastly, in exhaust systems, the Studded Captive Washer Screw is used in the connections between the exhaust manifold and the catalytic converter, as well as in the connections to the muffler and tailpipe. Its function is to maintain a secure and leak-free connection, which is important for the efficient operation of the exhaust system and for meeting emissions standards.

Overall, the Studded Captive Washer Screw is a versatile component that enhances the reliability and efficiency of various engine systems by providing secure and stable connections.

Conclusion

The Studded Captive Washer Screw (Part #3687127) is a critical component in the maintenance and operation of Cummins engines and commercial trucks. Its design and features contribute to the secure fastening of components, ensuring the structural integrity and performance of the vehicle. Regular maintenance and proper installation are essential to maximize the benefits of this part.