3930837
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3930837 and manufactured by Cummins, is a specialized fastener designed for use in commercial trucks. This screw is integral to the mechanical systems of trucks, ensuring secure and reliable connections across various components. Cummins, a renowned manufacturer in the commercial truck industry, produces this part with a focus on durability, performance, and compatibility with heavy-duty applications.

Basic Concepts

A Hexagon Flange Head Cap Screw is characterized by its hexagonal head and flanged design. The hexagonal head allows for efficient torque application using standard tools, while the flange provides additional surface area to distribute loads and prevent the screw from sinking into the material. Within a truck’s mechanical system, this screw plays a role in securing components that are subject to significant stress and vibration, ensuring structural integrity and reliable performance.

Purpose and Role in Truck Operation

The 3930837 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. By providing a secure connection, this screw helps maintain the alignment and integrity of critical truck components. Its design ensures that connections remain tight under dynamic conditions, contributing to the overall reliability and safety of the vehicle.

Key Features

The 3930837 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance and reliability. Its hexagonal head design allows for precise torque application, reducing the risk of over-tightening or stripping. The flange characteristic provides additional bearing surface, which helps in distributing loads more evenly and preventing the screw from embedding into the material. Additionally, the screw is crafted from high-strength materials, offering excellent resistance to corrosion and wear, which is vital for long-term durability in demanding truck environments.

Benefits

The benefits of using the 3930837 Hexagon Flange Head Cap Screw include enhanced stability, improved load distribution, and resistance to loosening. The flange design ensures that the screw remains flush with the surface, minimizing the risk of it working loose over time. This feature is particularly important in applications where vibrations and dynamic loads are common. Furthermore, the material properties of the screw contribute to its longevity and reliability, reducing the need for frequent replacements.

Installation and Usage

Proper installation of the 3930837 Hexagon Flange Head Cap Screw is vital to ensure optimal performance. It is recommended to use the appropriate torque specifications provided by the manufacturer to achieve the correct tension without over-tightening. Best practices include cleaning the installation surface to remove any debris or contaminants that could affect the screw’s grip. Additionally, using a torque wrench ensures that the screw is tightened to the specified torque, promoting a secure and lasting connection.

Troubleshooting and Maintenance

Common issues with the 3930837 Hexagon Flange Head Cap Screw may include loosening due to vibrations or corrosion. Regular inspections can help identify signs of wear or damage early. Maintenance tips include checking for proper torque and ensuring that the screw and surrounding components are free from corrosion. If signs of wear or damage are detected, it may be necessary to replace the screw to maintain the integrity of the connection.

Cummins Overview

Cummins is a well-established manufacturer with a strong reputation in the commercial truck industry. The company has a history of innovation and commitment to quality, producing a wide range of components designed to meet the demanding requirements of heavy-duty applications. Cummins’ focus on research and development ensures that their products, including the 3930837 Hexagon Flange Head Cap Screw, are at the forefront of technology and reliability in the market.

Compatibility with Cummins Engines

The Hexagon Flange Head Cap Screw, part number 3930837, is a versatile component designed to fit various Cummins engines. This screw is integral in securing different parts of the engine assembly, ensuring structural integrity and operational efficiency. Below is a detailed breakdown of the engines that this screw is compatible with, grouped where applicable for clarity.

Cummins 4B3.9 and 6B5.9 Engines

The 4B3.9 and 6B5.9 engines are part of Cummins’ earlier lineup, known for their robust design and reliability. The 3930837 screw is used in these engines to secure various components, including cylinder heads and engine blocks, ensuring that these parts remain tightly fastened under operational stresses.

Cummins 6C8.3 and QSC8.3 CM850 Engines

The 6C8.3 and QSC8.3 CM850 engines are mid-range engines that find applications in various industrial and commercial settings. The 3930837 screw is employed in these engines to fasten critical components, ensuring that the engine maintains its structural integrity during operation.

Cummins ISB Series Engines

The ISB series engines, including ISB (Chrysler), ISB CM2150, ISB CM850, ISB6.7 CM2250, ISB6.7 CM2350 B101, and ISL9 CM2150 SN, are high-performance engines used in heavy-duty applications. The 3930837 screw is utilized in these engines to secure various parts, such as the cylinder heads and engine blocks, ensuring that the engine operates efficiently and reliably.

Cummins QSB Series Engines

The QSB series engines, including QSB6.7 CM2250, QSB6.7 CM2350 B105, QSB6.7 CM850 (CM2850), QSB6.7 M CM2250, and QSB7 CM2880 B117, are designed for agricultural and construction applications. The 3930837 screw is used in these engines to fasten critical components, ensuring that the engine maintains its structural integrity under heavy loads.

Cummins QSL9 CM850 (CM2850) Engine

The QSL9 CM850 (CM2850) engine is a high-performance engine used in various heavy-duty applications. The 3930837 screw is employed in this engine to secure various parts, ensuring that the engine operates efficiently and reliably.

Cummins X12 and X13 Series Engines

The X12 CM2670 X121B and X13 CM2670 X122B engines are part of Cummins’ X12 and X13 series, designed for heavy-duty applications. The 3930837 screw is used in these engines to fasten critical components, ensuring that the engine maintains its structural integrity during operation.

By understanding the compatibility of the 3930837 Hexagon Flange Head Cap Screw with various Cummins engines, technicians and engineers can ensure that their engine assemblies are properly secured, leading to improved performance and longevity.

Role of Part 3930837 Hexagon Flange Head Cap Screw in Engine Systems

The part 3930837 Hexagon Flange Head Cap Screw is integral to the secure assembly and reliable operation of various engine components. Its robust design ensures that critical connections remain intact under the demanding conditions within an engine system.

Turbocharger Assembly

In the turbocharger arrangement, the Hexagon Flange Head Cap Screw is used to fasten the turbocharger housing to the engine block. This secure connection is essential for maintaining the integrity of the turbocharger, which plays a significant role in enhancing engine performance by increasing air intake efficiency.

Cylinder Head and Block Connection

The screw is also employed in the connection between the cylinder head and the engine block. This application ensures a tight seal, preventing any leaks that could compromise engine efficiency and performance. The flange head design provides additional surface area for a more secure fit.

Camshaft and Connecting Rod Mounting

For the camshaft and connecting rod assemblies, the Hexagon Flange Head Cap Screw is utilized in mounting these components to the engine block. This secure attachment is vital for the precise operation of the camshaft, which controls the timing of the valve operation, and the connecting rod, which translates the piston’s linear motion into rotational motion for the crankshaft.

Exhaust and Intake Manifolds

In the exhaust and intake manifolds, the screw ensures that these components are firmly attached to the cylinder head. This secure connection is important for maintaining the flow of exhaust gases and intake air, which are essential for engine performance and efficiency.

Fuel and Injector Plumbing

The Hexagon Flange Head Cap Screw is also critical in the fuel plumbing and injector connections. It secures the fuel lines and injectors to the engine block and cylinder head, ensuring that fuel delivery is consistent and reliable. This is particularly important for maintaining engine performance and preventing fuel leaks.

Electronic Control Module Wiring Harness

In the electronic control module (ECM) wiring harness, the screw is used to secure the harness to the engine block or other components. This ensures that the wiring remains intact and protected, which is essential for the reliable operation of the engine’s electronic systems.

Thermostat Housing

The screw is also utilized in the thermostat housing, ensuring that the housing is securely attached to the engine block. This connection is vital for maintaining the engine’s operating temperature, which is crucial for engine performance and longevity.

Front Gear and Cover Attachments

Finally, the Hexagon Flange Head Cap Screw is used in the attachment of the front gear and engine cover. These applications ensure that these components remain securely in place, contributing to the overall stability and performance of the engine.

Conclusion

The 3930837 Hexagon Flange Head Cap Screw is a critical component in the assembly and operation of Cummins engines, ensuring secure and reliable connections across various engine components. Its robust design and compatibility with a wide range of Cummins engines make it an essential part for maintaining engine performance and longevity.