3944593
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, specifically part #3944593 manufactured by Cummins, plays a significant role in the assembly and maintenance of commercial trucks. This screw is designed to provide secure fastening in various truck components, ensuring both structural integrity and functional reliability. Understanding its role and significance is vital for maintaining the efficiency and safety of truck operations.

Basic Concepts

The Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flanged base. The hexagonal head allows for easy tightening and loosening using a wrench or socket, while the flange provides additional surface area to distribute the load and prevent the screw from sinking into the material ¹. In the automotive industry, these screws are commonly used in applications requiring high torque and resistance to vibration, such as engine mounts, chassis components, and body panels. The screw operates by threading into a pre-drilled hole, creating a secure connection between two or more parts.

Purpose and Function

The 3944593 Hexagon Flange Head Cap Screw serves a specific purpose in truck operations by securing critical components that are subject to significant stress and vibration. It contributes to the structural integrity of truck assemblies by providing a robust fastening solution that can withstand the rigors of heavy-duty use. In contexts where components must remain firmly attached under varying conditions, this screw ensures that connections remain secure, thereby enhancing the overall reliability and safety of the truck.

Key Features

The 3944593 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance and reliability. Its hexagonal head design allows for efficient torque application, reducing the risk of cam-out during tightening. The flange characteristic provides additional bearing surface, which helps distribute the load more evenly and prevents the screw from pulling through the material. Additionally, the screw is typically made from high-strength materials, such as alloy steel, which offers excellent resistance to corrosion and wear ². These features collectively contribute to the screw’s durability and effectiveness in demanding applications.

Benefits

The 3944593 Hexagon Flange Head Cap Screw offers several benefits that make it a preferred choice for truck applications. One of the primary advantages is improved fastening security, which is crucial in environments where vibrations and dynamic loads are common. The screw’s design also provides resistance to loosening over time, ensuring that connections remain tight and secure. Furthermore, the ease of installation and removal, thanks to its hexagonal head, allows for quick and efficient maintenance, reducing downtime and enhancing operational efficiency.

Troubleshooting and Maintenance

Common issues associated with Hexagon Flange Head Cap Screws include loosening due to vibration, corrosion, and damage from over-tightening. To troubleshoot these problems, it is important to regularly inspect the screws for signs of wear or corrosion. If a screw appears loose, it should be re-tightened to the manufacturer’s specified torque settings. In cases of corrosion, the affected screw should be replaced to prevent further degradation. Regular maintenance, such as applying a corrosion-resistant coating and ensuring proper torque during installation, can help extend the lifespan and ensure the proper function of the screw in truck applications ³.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established itself as a trusted name in the diesel engine and related technologies market. The company is committed to innovation, quality, and customer satisfaction, providing solutions that meet the demanding requirements of various industries, including commercial trucking. Cummins’ expertise in engine components and fasteners ensures that their products, like the 3944593 Hexagon Flange Head Cap Screw, deliver reliable performance and durability.

Cummins Engine Compatibility with Hexagon Flange Head Cap Screw Part 3944593

The Hexagon Flange Head Cap Screw part 3944593, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is integral in securing components within the engine assembly, ensuring stability and integrity during operation. Below is a detailed breakdown of the engine compatibility for this specific screw.

4B3.9, 6B5.9, 6C8.3, B3.3, B3.9 G, B4.5, B4.5 CM2350 B129B, B4.5 RGT, B5.6 CM2670 B152B, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556, B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C, B6.7 G CMOH6.0 B125, B6.7S

The Hexagon Flange Head Cap Screw part 3944593 is compatible with a wide range of Cummins engines, including the 4B3.9, 6B5.9, 6C8.3, B3.3, B3.9 G, B4.5, B4.5 CM2350 B129B, B4.5 RGT, B5.6 CM2670 B152B, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556, B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C, B6.7 G CMOH6.0 B125, and B6.7S. This screw is designed to fit the specific threading and flange requirements of these engines, ensuring a secure and reliable connection.

D4.0 CM2620 D103B, F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F3.8 F102, F4.5 CM2620 F139B, F4.5 CM2620 F141C, G5.9

The Hexagon Flange Head Cap Screw part 3944593 also fits the D4.0 CM2620 D103B, F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F3.8 F102, F4.5 CM2620 F139B, F4.5 CM2620 F141C, and G5.9 engines. This compatibility ensures that the screw can be used across a broad spectrum of engine models, providing a standardized solution for securing various components within these engines.

This compatibility highlights the versatility and robustness of the Hexagon Flange Head Cap Screw part 3944593, making it a reliable choice for securing components in multiple Cummins engine models.

Role of Part 3944593 Hexagon Flange Head Cap Screw in Engine Systems

The part 3944593 Hexagon Flange Head Cap Screw is integral to the assembly and functionality of various engine components. Its robust design and secure fastening capabilities make it suitable for several critical applications within engine systems.

Aftercooler and Turbocharger Arrangement

In the aftercooler and turbocharger arrangement, the Hexagon Flange Head Cap Screw is used to secure the connection between the turbocharger and the aftercooler. This ensures a tight seal, preventing any leaks that could compromise the efficiency of the cooling process. The screw’s flange head provides additional surface area for torque application, enhancing the stability of the connection.

Water Inlet and Cover Assembly

At the water inlet and cover, the screw plays a role in maintaining the integrity of the water pump housing. It secures the cover to the housing, ensuring that the water inlet remains sealed. This is vital for maintaining the pressure and flow of coolant within the engine cooling system.

Cam Follower and Cylinder Block

Within the cylinder block, the Hexagon Flange Head Cap Screw is often employed to secure cam followers. This ensures that the cam followers remain in place and operate smoothly, which is essential for the precise timing of valve operations.

Drive and Water Pump Connection

The screw is also utilized in the drive mechanism of the water pump. It secures the drive components, ensuring that the water pump operates efficiently without any slippage or misalignment. This is particularly important in maintaining consistent coolant flow throughout the engine.

Exhaust Manifold Mounting

In the exhaust manifold mounting, the Hexagon Flange Head Cap Screw is used to secure the manifold to the engine block. This connection must be robust to withstand the high temperatures and vibrations associated with exhaust gases.

Fan and Flywheel Housing

The screw is instrumental in securing the fan to its housing and the flywheel to its respective housing. This ensures that these components operate efficiently and do not become dislodged during engine operation.

Front Gear and Centinel Make-up Installation

In the front gear arrangement and Centinel make-up installation, the screw provides the necessary fastening strength to keep these components in place. This is essential for the smooth operation of the engine’s front-end accessories.

Fuel Filter and Oil Level Gauge Location

The Hexagon Flange Head Cap Screw is also used to secure the fuel filter and oil level gauge in their designated locations. This ensures that these critical monitoring components remain firmly in place and provide accurate readings.

Manifold and Air Intake

In the manifold and air intake system, the screw secures various components, ensuring a sealed and efficient airflow into the engine. This is vital for optimal combustion and engine performance.

Exhaust Recirculation and Premium Exhaust Manifold

For the exhaust recirculation system and premium exhaust manifold, the screw ensures that all connections are secure, preventing any leaks that could affect the recirculation process and exhaust efficiency.

Service Kit and Spacer Applications

Within service kits, the Hexagon Flange Head Cap Screw is often included to replace worn-out fasteners. Its use in spacer applications ensures that components are maintained at the correct distances, crucial for the engine’s mechanical integrity.

Fan Pilot and Engine Cooling System

Finally, in the fan pilot and engine cooling system, the screw secures components that are essential for maintaining the engine’s operating temperature within safe limits. This includes securing the fan pilot to ensure proper airflow over the radiator.

Conclusion

The 3944593 Hexagon Flange Head Cap Screw by Cummins is a critical component in the assembly and maintenance of commercial trucks and various engine systems. Its robust design, secure fastening capabilities, and compatibility with a wide range of Cummins engines make it an indispensable part for ensuring the structural integrity and functional reliability of truck operations. Regular maintenance and proper installation are essential to maximize the lifespan and effectiveness of this Cummins part.