3935271
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3935271 and manufactured by Cummins, is a specialized fastener designed for heavy-duty truck applications. Cummins, a well-established name in the automotive industry, is recognized for its commitment to quality and innovation. This screw is integral to the mechanical systems of heavy-duty trucks, ensuring secure and reliable fastening in various components.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of bolt characterized by its hexagonal head and flanged base. The hexagonal head allows for efficient tightening and loosening using a wrench, while the flange provides additional surface area to distribute the load and prevent the screw from sinking into the material. In a truck’s mechanical system, this screw plays a role in securing components that require high tensile strength and resistance to vibration ¹.

Purpose and Role in Truck Operation

The 3935271 Hexagon Flange Head Cap Screw is utilized in various applications within a truck’s operation. It is commonly employed in fastening engine components, transmission parts, and chassis assemblies. Its design ensures that critical components remain securely attached, even under the strenuous conditions encountered in heavy-duty truck operations. This screw helps maintain the integrity and performance of the truck’s mechanical systems.

Key Features

The 3935271 Hexagon Flange Head Cap Screw boasts several key features that enhance its functionality. Its hexagonal head design allows for easy and precise tightening using standard tools. The flange at the base of the screw provides additional bearing surface, which helps distribute the load and reduces the risk of the screw pulling through the material. Additionally, the screw is crafted from high-quality materials, ensuring durability and resistance to corrosion and wear ².

Benefits

Using the 3935271 Hexagon Flange Head Cap Screw offers several advantages. Its robust design contributes to the durability of the fastening, making it less prone to loosening over time, even under vibration and dynamic loads. The ease of installation and removal is enhanced by its hexagonal head, allowing for efficient maintenance and repair processes. Furthermore, the flange design helps in distributing the load, reducing the stress on the fastened material.

Installation and Usage

Proper installation of the 3935271 Hexagon Flange Head Cap Screw is vital for ensuring its effectiveness. It should be installed with the correct torque specifications to achieve the desired clamping force without over-tightening, which could lead to damage. Using the appropriate tools and following best practices for tightening will help maintain the screw’s integrity and the security of the fastened components.

Troubleshooting and Maintenance

Common issues with the 3935271 Hexagon Flange Head Cap Screw may include loosening due to vibration or corrosion. Regular inspection and maintenance can help identify and address these issues promptly. Ensuring that the screw is properly torqued during installation and periodically checking for signs of wear or corrosion can extend its service life and maintain the performance of the truck’s mechanical systems.

Cummins: Manufacturer Overview

Cummins is a renowned manufacturer in the automotive industry, with a history of producing high-quality components for heavy-duty applications. The company is known for its commitment to innovation, quality, and customer satisfaction. Cummins’ reputation is built on its ability to deliver reliable and durable products that meet the demanding requirements of heavy-duty truck operations. The 3935271 Hexagon Flange Head Cap Screw is a testament to Cummins’ dedication to excellence in manufacturing ³.

Cummins Engine Part 3935271: Hexagon Flange Head Cap Screw

The Cummins part 3935271, a Hexagon Flange Head Cap Screw, is a critical component used in various Cummins engine models. This part is designed to secure different engine parts and assemblies, ensuring structural integrity and operational efficiency. Below is a detailed description of how this part fits into the specified engine models:

4B3.9 and 6B5.9 Engines

In the 4B3.9 and 6B5.9 engines, the Hexagon Flange Head Cap Screw is utilized to fasten components that require a secure and reliable connection. These engines are known for their robust design and high performance, and the part 3935271 plays a vital role in maintaining the integrity of the engine’s internal and external structures.

ISZ13 CM2150 Z105, QSZ13 CM2150 Z101, and QSZ13 CM2150 Z102 Engines

The ISZ13 CM2150 Z105, QSZ13 CM2150 Z101, and QSZ13 CM2150 Z102 engines benefit from the use of the Hexagon Flange Head Cap Screw in several ways. This part is often used to secure various engine covers, brackets, and other structural components. Its flange head design provides a larger surface area for torque application, ensuring that the connections remain tight and secure under operational stresses.

L8.9G CMOH2.0 L125B and Z13 Z108G Engines

For the L8.9G CMOH2.0 L125B and Z13 Z108G engines, the Hexagon Flange Head Cap Screw is integral to the assembly and maintenance processes. This part is typically used in areas where high strength and durability are required, such as securing engine blocks, cylinder heads, and other critical assemblies. The flange head design allows for easier and more efficient tightening, which is crucial for maintaining the engine’s performance and longevity.

Application Considerations

When using the Hexagon Flange Head Cap Screw in Cummins engines, it is essential to follow proper torque specifications and use the correct tools to ensure that the screw is tightened to the manufacturer’s recommended levels. This will help prevent issues such as stripped threads, over-tightening, or under-tightening, which can lead to engine failure or reduced performance.

Understanding the Role of Part 3935271 Hexagon Flange Head Cap Screw in Engine Systems

The part 3935271 Hexagon Flange Head Cap Screw is a specialized fastener designed to provide secure and reliable connections in various engine components. Its robust design ensures that it can withstand the high stresses and vibrations typical in engine environments. Below is a detailed look at how this screw fits into the broader context of engine systems.

Camshaft Assembly

In the camshaft assembly, the Hexagon Flange Head Cap Screw is often used to secure the camshaft to the cylinder head. This ensures that the camshaft remains in precise alignment with the valve train, which is essential for the proper operation of the engine’s valve timing. The flange head of the screw provides additional surface area for torque application, reducing the risk of stripping or loosening over time.

Connecting Rod and Piston

When it comes to the connecting rod and piston assembly, this screw plays a role in securing the connecting rod cap to the main body of the connecting rod. This connection is vital for maintaining the integrity of the piston’s movement within the cylinder. The flange head design allows for better torque distribution, ensuring that the connecting rod remains tightly secured even under the extreme forces generated during engine operation.

Cylinder Head and Cylinder Head Kit

In the cylinder head and cylinder head kit, the Hexagon Flange Head Cap Screw is commonly used to fasten various components such as valve covers, intake manifolds, and exhaust manifolds. These connections need to be both secure and leak-proof to maintain the engine’s efficiency and performance. The screw’s design helps in achieving a tight seal, preventing any potential leaks that could compromise engine performance.

Electronic Control Cooler and Wiring Harness

For the electronic control cooler and the electronic control module wiring harness, this screw is used to mount these sensitive components securely within the engine bay. Given the importance of these electronics in modern engine management systems, a reliable fastening solution is essential. The Hexagon Flange Head Cap Screw provides the necessary stability and security, ensuring that these components remain in place and function correctly under varying engine conditions.

Fuel Plumbing and Fuel Shutoff Valve

In fuel systems, particularly in fuel plumbing and the fuel shutoff valve, this screw is employed to secure fuel lines and components. The secure fastening is crucial to prevent fuel leaks, which pose significant safety risks. The screw’s design ensures a tight and durable connection, contributing to the overall safety and reliability of the fuel system.

Fuel Transfer Pump and Injector

For the fuel transfer pump and injector, the Hexagon Flange Head Cap Screw is used to mount these components securely within the engine system. This is particularly important for high-performance engines where precision and reliability are paramount. The screw ensures that these components remain firmly in place, allowing for optimal fuel delivery and combustion efficiency.

Performance Parts

In the realm of performance parts, this screw is often utilized to secure aftermarket components that are designed to enhance engine performance. Whether it’s a high-flow intake manifold, a performance exhaust system, or upgraded valve train components, the secure fastening provided by the Hexagon Flange Head Cap Screw is essential for maintaining the integrity and performance of these parts under high-stress conditions.

Conclusion

By understanding the specific roles that the part 3935271 Hexagon Flange Head Cap Screw plays in these engine components, engineers and mechanics can better appreciate its importance in ensuring the overall reliability and performance of the engine system.