3943885
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by Part #3943885, is a component manufactured by Cummins, a leader in diesel engine technology. This screw is significant in the realm of commercial truck maintenance due to its robust design and reliable performance. Cummins, known for its commitment to quality and innovation, ensures that this part meets the demanding requirements of heavy-duty applications ¹.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flanged base. The hexagonal head allows for efficient torque application using standard tools, while the flange provides additional surface area to distribute the load and prevent the screw from sinking into the material ². Within mechanical systems, these screws are used to secure components, ensuring stability and integrity under various operational conditions.

Purpose and Role in Truck Operation

This Cummins part plays a specific role in the operation and maintenance of commercial trucks. It is utilized in various truck components where secure fastening is required. This includes applications in the engine compartment, chassis, and other critical areas where vibrations and dynamic loads are common. By providing a stable and reliable connection, this screw helps maintain the structural integrity and performance of the truck ³.

Key Features

The Hexagon Flange Head Cap Screw boasts several key features that enhance its performance and durability. 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 the load more evenly. Additionally, the material properties of the screw, typically high-strength steel, ensure it can withstand significant stress and corrosion, making it suitable for heavy-duty applications.

Benefits

The benefits of using the Hexagon Flange Head Cap Screw include improved torque application due to its hexagonal head, which allows for better grip and control during installation. The flange design offers resistance to loosening, which is crucial in dynamic environments like those found in commercial trucks. Furthermore, the enhanced load distribution provided by the flange helps in reducing the stress on the fastened components, prolonging their lifespan.

Installation and Usage

Proper installation of the Hexagon Flange Head Cap Screw is vital for optimal performance. It should be installed using the correct torque specifications to ensure it is neither under-tightened nor over-tightened. Best practices include using the appropriate tools and ensuring the surfaces are clean and free of debris. Following these guidelines will help in achieving a secure and lasting connection.

Troubleshooting and Maintenance

Common issues with the Hexagon Flange Head Cap Screw may include signs of wear, corrosion, or improper installation. Regular inspection for these issues can help in identifying potential problems early. Maintenance tips include keeping the screw and surrounding areas clean, applying appropriate coatings to prevent corrosion, and replacing the screw if significant wear is detected. These practices will help in prolonging the screw’s lifespan and ensuring reliable operation.

Safety Considerations

When working with the Hexagon Flange Head Cap Screw, it is important to observe safety practices and precautions. This includes proper handling to avoid injury, adhering to torque specifications to prevent damage, and wearing personal protective equipment (PPE) such as gloves and safety glasses. These measures ensure a safe working environment and protect both the technician and the equipment.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes diesel and natural gas engines, as well as related technologies. With a history spanning over a century, Cummins has established itself as a trusted name in the commercial truck industry. The company’s commitment to quality, innovation, and customer satisfaction is evident in its wide range of products, including the Hexagon Flange Head Cap Screw (Part #3943885).

Hexagon Flange Head Cap Screw 3943885 in Cummins Engines

The Hexagon Flange Head Cap Screw 3943885, manufactured by Cummins, is a critical component used in various Cummins engines. This screw is designed to provide secure fastening, ensuring that parts remain tightly secured under operational stresses. Below is a detailed description of how this screw fits into different Cummins engines.

6B5.9 and 6C8.3 Engines

In the 6B5.9 and 6C8.3 engines, the 3943885 screw is often used to secure various components, such as covers and housings, ensuring that they remain tightly fastened during operation. These engines, known for their reliability and performance, benefit from the precision and strength provided by this screw.

C GAS PLUS CM556 and L GAS PLUS CM556 Engines

For the C GAS PLUS CM556 and L GAS PLUS CM556 engines, the 3943885 screw is utilized in securing critical parts that require a robust fastening solution. These engines are designed for gas applications, and the screw’s design ensures that the components are securely fastened, contributing to the engine’s overall durability and performance.

G5.9, G8.3, and G8.3 CM558 Engines

In the G5.9, G8.3, and G8.3 CM558 engines, the 3943885 screw is used to fasten various parts, including covers and brackets. These engines are known for their versatility and efficiency, and the screw’s design ensures that the components are securely fastened, contributing to the engine’s longevity and reliability.

GTA8.3 CM558 and ISC CM2150 Engines

The GTA8.3 CM558 and ISC CM2150 engines utilize the 3943885 screw to secure multiple components, ensuring that they remain tightly fastened under operational stresses. These engines are designed for high-performance applications, and the screw’s precision and strength are essential for maintaining the integrity of the engine components.

ISC CM554 and ISC CM850 Engines

In the ISC CM554 and ISC CM850 engines, the 3943885 screw is used to fasten various parts, including covers and brackets. These engines are known for their reliability and performance, and the screw’s design ensures that the components are securely fastened, contributing to the engine’s overall durability and efficiency.

ISC8.3 CM2250 and ISF2.8 CM2220 F129 Engines

The ISC8.3 CM2250 and ISF2.8 CM2220 F129 engines utilize the 3943885 screw to secure multiple components, ensuring that they remain tightly fastened under operational stresses. These engines are designed for high-performance applications, and the screw’s precision and strength are essential for maintaining the integrity of the engine components.

ISL CM2150, ISL CM554, and ISL G CM2180 Engines

In the ISL CM2150, ISL CM554, and ISL G CM2180 engines, the 3943885 screw is used to fasten various parts, including covers and brackets. These engines are known for their reliability and performance, and the screw’s design ensures that the components are securely fastened, contributing to the engine’s overall durability and efficiency.

ISL9 CM2150 SN, ISL9 CM2250, and ISL9.5 CM2880 L138 Engines

The ISL9 CM2150 SN, ISL9 CM2250, and ISL9.5 CM2880 L138 engines utilize the 3943885 screw to secure multiple components, ensuring that they remain tightly fastened under operational stresses. These engines are designed for high-performance applications, and the screw’s precision and strength are essential for maintaining the integrity of the engine components.

ISX12 CM2350 X102 and ISX12/ISX11.9 CM2250 Engines

In the ISX12 CM2350 X102 and ISX12/ISX11.9 CM2250 engines, the 3943885 screw is used to fasten various parts, including covers and brackets. These engines are known for their reliability and performance, and the screw’s design ensures that the components are securely fastened, contributing to the engine’s overall durability and efficiency.

L8.9, L8.9 CM2670 L134C, L8.9 L121, and L8.9G CMOH2.0 L125B Engines

The L8.9, L8.9 CM2670 L134C, L8.9 L121, and L8.9G CMOH2.0 L125B engines utilize the 3943885 screw to secure multiple components, ensuring that they remain tightly fastened under operational stresses. These engines are known for their reliability and performance, and the screw’s precision and strength are essential for maintaining the integrity of the engine components.

Role of Part 3943885 Hexagon Flange Head Cap Screw in Engine Systems

The Part 3943885 Hexagon Flange Head Cap Screw is integral to the assembly and functionality of various engine components. Its primary role is to secure and maintain the structural integrity of these components, ensuring they operate efficiently and reliably.

Aftercooler

In the aftercooler system, the Hexagon Flange Head Cap Screw is used to fasten the aftercooler to its mounting bracket. This secure attachment ensures that the aftercooler remains stable during operation, allowing for effective cooling of the compressed air before it enters the engine.

Compressor Coolant Block

Within the compressor coolant block, these screws are employed to attach the coolant passages and ensure a leak-free seal. This is vital for maintaining the coolant flow, which is essential for regulating the temperature of the compressor.

Cylinder and Drive Components

The Hexagon Flange Head Cap Screws are utilized in the cylinder assembly to secure the cylinder head to the engine block. Additionally, in the drive components, they help in attaching the drive shaft to the rear gear train accessory, ensuring smooth transmission of power.

Exhaust Transfer Connection Bracket

These screws play a significant role in the exhaust system by securing the exhaust transfer connection bracket. This ensures a tight fit, preventing exhaust leaks and maintaining the efficiency of the exhaust system.

Fuel Pump and Fuel Pump Coupling

In the fuel system, the Hexagon Flange Head Cap Screws are used to attach the fuel pump to its housing and secure the fuel pump coupling. This ensures that the fuel pump operates within its designed parameters, providing consistent fuel delivery.

Governor and Electronic Housing

For the governor and electronic housing, these screws are essential in securing the components within their respective housings. This ensures that the governor functions correctly, maintaining the engine’s speed and performance.

Front Gear and Mounting

In the front gear assembly, the Hexagon Flange Head Cap Screws are used to attach the front gear to its mounting bracket. This secure attachment is necessary for the proper functioning of the gear train and the overall drive system.

Air Cleaner and Plumbing

Within the air cleaner assembly, these screws secure the air cleaner housing, ensuring it remains intact and functions effectively. In the plumbing system, they are used to attach various components, ensuring a secure and leak-free connection.

Recirculation and Exhaust Sensor

For the recirculation system and exhaust sensor, the Hexagon Flange Head Cap Screws are used to secure these components in place. This ensures that the recirculation system operates efficiently and that the exhaust sensor provides accurate readings.

Fuel Pressure Valve and Throttle

Finally, in the fuel pressure valve and throttle assembly, these screws are used to secure the components, ensuring they function within their designed parameters. This is essential for maintaining the engine’s fuel pressure and throttle response.

Conclusion

The Hexagon Flange Head Cap Screw (Part #3943885) is a critical component in the maintenance and operation of commercial trucks and various Cummins engines. Its robust design, reliable performance, and key features make it an essential part for securing components under demanding operational conditions. Proper installation, regular maintenance, and adherence to safety practices ensure the longevity and efficiency of this screw in heavy-duty applications.