3863515
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flanged Head Cap Screw, identified by part number 3863515, is a component manufactured by Cummins, a well-established name in the commercial truck industry. This screw plays a significant role in the maintenance and operation of commercial trucks, ensuring the secure fastening of various components. Understanding its design, function, and the manufacturer’s reputation is key to appreciating its importance in truck maintenance.

Basic Concepts

A Hexagon Flanged Head Cap Screw is a type of fastener characterized by its hexagonal head and a flanged feature near the head. The hexagonal head allows for efficient torque application using standard tools, while the flange provides additional surface area to distribute load and prevent the screw from being driven too far into the material ¹. Within a truck’s mechanical system, this screw serves to securely fasten components, contributing to the overall structural integrity and functionality of the vehicle.

Purpose and Role in Truck Operation

This Cummins part is specifically designed to secure components within a commercial truck. Its role is pivotal in maintaining the structural integrity of the truck by ensuring that parts remain firmly attached under various operational conditions. This screw is often used in applications where vibration resistance and secure fastening are required, such as in the attachment of engine components, body panels, and other critical assemblies.

Key Features

The 3863515 boasts several key features that enhance its functionality and durability. Its hexagonal head design allows for easy and secure tightening with standard tools, reducing the risk of cam-out. The flanged feature near the head not only aids in preventing over-driving but also provides additional surface area for load distribution. Additionally, the material composition of the screw, typically a high-strength alloy, ensures resistance to corrosion and wear, contributing to its longevity in demanding environments ².

Benefits

The benefits of using the 3863515 include enhanced fastening security, resistance to vibration, and ease of installation and removal. The design of the screw allows for secure attachment of components, minimizing the risk of loosening over time. Its resistance to vibration makes it suitable for use in dynamic environments, such as those found in commercial trucks. Furthermore, the ease of installation and removal facilitates maintenance procedures, allowing for quick and efficient component replacement or adjustment.

Installation Process

Proper installation of the 3863515 involves several steps to ensure optimal performance and longevity. Begin by selecting the appropriate size and grade of screw for the application. Use a torque wrench to apply the recommended torque specification, ensuring the screw is tightened to the manufacturer’s specifications without over-tightening. It is also important to inspect the mating surfaces for cleanliness and proper alignment before installation to prevent damage to the screw or the component being fastened.

Troubleshooting and Maintenance

Common issues related to the 3863515 may include loosening due to vibration or corrosion over time. Regular inspection and maintenance are recommended to identify and address these issues promptly. If loosening is detected, re-tighten the screw to the specified torque, or consider replacing it if signs of wear or corrosion are present. Additionally, applying a thread locker compound during installation can help prevent loosening due to vibration.

Cummins Overview

Cummins, the manufacturer of the 3863515, is a renowned company in the commercial truck industry. With a history of innovation and quality, Cummins offers a wide range of products designed to enhance the performance and reliability of commercial vehicles. The company’s reputation for producing high-quality, durable components is a testament to its commitment to excellence in the automotive and heavy-duty truck sectors.

Hexagon Flanged Head Cap Screw 3863515 in Cummins Engines

The 3863515, manufactured by Cummins, is a critical component in several of their engine models. This part is integral to the assembly and maintenance of the engines, ensuring secure fastening and structural integrity.

QSK23 Series

The QSK23 series engines, including the QSK23 CM2250 K109, QSK23 CM2350 K127, and QSK23 CM500, utilize the 3863515 screw in various applications. These engines are known for their robust design and high performance, often used in heavy-duty applications. The screw’s flanged head provides a larger surface area for torque application, which is crucial for maintaining the tight connections required in these engines.

QSK78 Series

In the QSK78 series, the 3863515 screw is also a key component. This series includes the QSK78 CM2250 K104, QSK78 CM2350 K126, and QSK78 CM2350 K137 engines. These engines are designed for demanding environments, and the screw’s design ensures that it can withstand the stresses and vibrations typical of such conditions. The flanged head allows for easier and more secure fastening, which is essential for the longevity and reliability of the engine components.

Common Applications

Across both series, the 3863515 screw is used in various applications, including:

• Cylinder Head Bolting: Ensuring the cylinder heads are securely fastened to the engine block.
• Turbocharger Mounting: Providing a reliable connection for turbochargers, which are critical for performance and efficiency.
• Accessory Drive Systems: Securing components of the accessory drive, such as pulleys and belts, which are essential for the engine’s ancillary systems.

The use of the 3863515 screw in these engines highlights its importance in maintaining the structural integrity and performance of Cummins engines. Its design and material ensure that it can handle the demanding conditions these engines operate under, contributing to their overall reliability and durability.

Role of Part 3863515 in Various Engine Systems

Plumbing Systems

In plumbing systems, the 3863515 is often used to secure fittings and connections. Its design allows for a tight seal, which is essential for preventing leaks in both fuel and coolant lines. The flanged head provides additional surface area for torque application, ensuring that connections remain secure under varying pressure conditions.

Fuel Drain Systems

When it comes to fuel drain systems, this screw plays a significant role in attaching drain valves and fittings. The secure fastening provided by the screw ensures that fuel can be efficiently drained without any risk of spillage or leakage. This is particularly important in high-pressure fuel systems where even a small leak can pose a safety hazard.

Turbocharger Assemblies

In turbocharger applications, the 3863515 is utilized to fasten various components such as the compressor housing, turbine housing, and wastegate actuator. The screw’s robust design helps maintain the integrity of these high-stress areas, ensuring optimal turbocharger performance and durability.

Turbocharger Kits

Within turbocharger kits, this screw is commonly found securing manifold connections, intercooler piping, and other critical components. Its ability to withstand high temperatures and pressures makes it an ideal choice for these applications, contributing to the overall efficiency and reliability of the turbocharger system.

Turbocharger Plumbing

For turbocharger plumbing, the 3863515 is essential for securing hoses, pipes, and fittings. Its design ensures a leak-free connection, which is vital for maintaining the turbocharger’s performance and preventing any potential damage from fluid leaks.

Conclusion

The 3863515 Hexagon Flanged Head Cap Screw is a vital component in the maintenance and operation of commercial trucks, particularly in Cummins engines. Its design, featuring a hexagonal head and flanged feature, ensures secure fastening and resistance to vibration, making it suitable for various demanding applications. The screw’s role in securing critical components within the engine, such as cylinder heads, turbochargers, and accessory drive systems, underscores its importance in maintaining the structural integrity and performance of these engines. Regular maintenance and proper installation are essential to ensure the longevity and reliability of this component in the demanding environments of commercial truck operations.