3819521
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3819521, is a specialized fastener produced by Cummins, a renowned manufacturer in the commercial vehicle industry. This screw is integral to various applications within commercial trucks, contributing to the secure fastening of components and the overall structural integrity of the vehicle.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of bolt characterized by its hexagonal head and a flange beneath the head. This design allows for efficient torque application and provides a larger bearing surface, which helps distribute load more evenly ¹. In fastening applications, these screws are used to join components securely, ensuring they remain fixed under operational stresses. Within mechanical systems, they play a role in maintaining the alignment and integrity of assembled parts.

Purpose and Role in Truck Operation

The 3819521 Hexagon Flange Head Cap Screw serves a specific purpose in commercial trucks by ensuring secure fastening of various components. Its design allows it to withstand significant stress and vibration, which are common in truck operations ². By providing a stable connection, this screw helps maintain the structural integrity of critical truck parts, contributing to the vehicle’s overall performance and safety.

Key Features

The 3819521 Hexagon Flange Head Cap Screw features a hexagonal head that facilitates easy and precise torque application using standard tools. The flange beneath the head offers additional surface area, which enhances the screw’s ability to resist loosening under dynamic conditions. Additionally, the screw is crafted from high-quality materials, ensuring durability and resistance to corrosion, which is vital for long-term performance in demanding truck environments ³.

Benefits

This screw offers several benefits, including enhanced torque application due to its hexagonal head design. The flange provides added resistance to loosening, which is crucial in applications where vibrations are common. Furthermore, its compatibility with various truck components makes it a versatile choice for different fastening needs, ensuring reliable performance across a range of applications.

Installation Considerations

Proper installation of the 3819521 Hexagon Flange Head Cap Screw is vital to ensure secure and reliable fastening. It is important to adhere to the specified torque values to avoid over-tightening or under-tightening, both of which can compromise the screw’s effectiveness. Additionally, ensuring proper thread engagement is critical for maintaining the integrity of the connection. Following best practices during installation will help achieve a secure and durable fastening solution ⁴.

Troubleshooting and Maintenance

Common issues with the 3819521 Hexagon Flange Head Cap Screw may include loosening, corrosion, or damage. Regular inspection and maintenance can help identify and address these issues promptly. If loosening is detected, re-tightening to the specified torque value is recommended. Corrosion can be mitigated through the use of appropriate coatings or treatments, and damaged screws should be replaced to maintain the integrity of the fastening. Consistent maintenance practices will help prolong the screw’s lifespan and ensure continued performance.

Cummins Overview

Cummins is a well-established manufacturer with a strong reputation in the automotive industry, particularly in the production of high-quality components for commercial vehicles. With a history of innovation and commitment to excellence, Cummins continues to deliver reliable and durable parts that meet the demanding requirements of commercial truck applications. Their focus on quality and performance ensures that components like the 3819521 Hexagon Flange Head Cap Screw are designed to withstand the rigors of truck operations.

Hexagon Flange Head Cap Screw (Part 3819521) in Cummins Engines

The Hexagon Flange Head Cap Screw, part number 3819521, is a critical component in various Cummins engines, ensuring secure fastening and structural integrity. This screw is designed to withstand high stress and provide reliable performance in demanding environments.

ISM Series Engines

The ISM series engines, including the ISM CM570, ISM CM570/870, ISM CM876, and QSM11 CM570, utilize the 3819521 screw in several applications. These engines are known for their robust design and efficiency, often used in heavy-duty applications such as marine and industrial settings. The screw’s ability to maintain a tight and secure connection is crucial for the proper functioning of these engines.

ISM11 Series Engines

The ISM11 CM876 SN engine also incorporates the 3819521 screw. This engine is part of the ISM11 series, which is designed for high-performance applications, often found in power generation and heavy-duty transport. The screw’s durability and strength are essential for maintaining the integrity of the engine’s components under heavy loads.

ISX Series Engines

The ISX series engines, including the ISX12 CM2350 X102, ISX12 G CM2180 EJ, and ISX12/ISX11.9 CM2250, rely on the 3819521 screw for various fastening needs. These engines are known for their power and efficiency, commonly used in on-highway and vocational applications. The screw’s design ensures that critical components remain securely fastened, even under extreme conditions.

L10 Series Engines

The L10 series engines, such as the L10 CELECT, L10 GAS, and L10 MECHANICAL, also use the 3819521 screw. These engines are designed for a range of applications, from marine to industrial use. The screw’s reliability and strength are vital for maintaining the structural integrity of these engines, ensuring they perform consistently in various environments.

M11 Series Engines

The M11 series engines, including the M11 CELECT, M11 CELECT PLUS, and M11 MECHANICAL, incorporate the 3819521 screw in their design. These engines are known for their versatility and efficiency, often used in both on-highway and off-highway applications. The screw’s ability to provide a secure fastening is crucial for the proper operation of these engines.

QSX Series Engines

The QSX11.9 CM2250 ECF engine also utilizes the 3819521 screw. This engine is part of the QSX series, designed for high-performance applications, often found in heavy-duty transport and power generation. The screw’s durability and strength are essential for maintaining the integrity of the engine’s components under heavy loads.

Role of Part 3819521 Hexagon Flange Head Cap Screw in Engine Systems

In the intricate assembly of engine systems, the part 3819521 Hexagon Flange Head Cap Screw serves as a fundamental fastening component, ensuring the secure attachment of various critical elements. Its application spans across multiple subsystems, contributing to the overall integrity and functionality of the engine.

Aftercooler and Air Connection

Within the aftercooler system, this screw is utilized to fasten components that facilitate the cooling of compressed air. It ensures that the connections between the aftercooler and the air intake system remain tight, preventing air leaks that could compromise engine efficiency.

Ignition System and Turbocharger Arrangement

In the ignition system, the Hexagon Flange Head Cap Screw is employed to secure ignition components, ensuring reliable spark delivery to the combustion chambers. Similarly, in the turbocharger arrangement, it plays a role in fastening the turbocharger to its mounting bracket, contributing to the stable operation of the turbocharger under high-stress conditions.

Cleaner and Air Connection

For the air cleaner system, this screw is integral in securing the air cleaner housing to the engine, ensuring a clean air supply to the combustion process. It also aids in maintaining the integrity of air connections, preventing any disruptions in airflow that could affect engine performance.

Water Outlet and Drive Systems

At the water outlet, the screw ensures that the connection between the engine block and the cooling system remains secure, facilitating efficient heat dissipation. In drive systems, particularly the front gear train accessory and the hydraulic pump drive mounting, it secures components that are vital for the transmission of power and the operation of auxiliary systems.

Governor and Electronic Systems

In the governor system, whether electronic or hydraulic, the Hexagon Flange Head Cap Screw is used to fasten components that regulate engine speed, ensuring consistent performance. In electronic engine control systems, it secures sensors and control units, contributing to precise engine management.

Refrigerant Compressor and Plumbing

For the refrigerant compressor, this screw is essential in securing the compressor to its mounting, ensuring efficient operation of the cooling system. In the plumbing of the fuel supply, it ensures that connections remain secure, preventing leaks that could pose safety hazards.

Spacer and Fan Pilot System

As a spacer, the screw maintains the correct distance between components, ensuring optimal function and clearance. In the fan pilot system, it secures components that control the operation of the engine cooling fan, contributing to effective thermal management.

Wiring Harness and Engine Instrument Panel

Finally, in the wiring harness and engine instrument panel, the Hexagon Flange Head Cap Screw secures electrical components and instrumentation, ensuring reliable data transmission and display, which are vital for engine monitoring and diagnostics.

Through its versatile application across these systems, the part 3819521 Hexagon Flange Head Cap Screw plays a significant role in maintaining the structural and operational integrity of engine systems.

Conclusion

The 3819521 Hexagon Flange Head Cap Screw is a vital component in the commercial vehicle industry, particularly within Cummins engines. Its design and features ensure secure fastening and structural integrity across a wide range of applications. Proper installation, regular maintenance, and understanding its role in various engine systems are crucial for ensuring the longevity and performance of this essential part.