3904071
Hexagon Head Cap Screw
Cummins®

The 3904071 Hexagon Head Cap Screw is a specialized fastener produced by Cummins, a leading manufacturer in the commercial truck industry. This screw is designed for use in various applications within commercial trucks, contributing to the secure assembly of components and the overall reliability of truck systems.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of fastener characterized by its hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. These screws are commonly used in mechanical assemblies to secure components together, providing a strong and durable connection. The hexagonal shape of the head is designed to prevent the tool from slipping during use, ensuring precise torque application ¹.

Purpose of the 3904071 Hexagon Head Cap Screw in Truck Operation

The 3904071 Hexagon Head Cap Screw plays a role in the operation and maintenance of commercial trucks by securing critical components in various truck systems. Its applications range from engine assemblies to chassis components, ensuring that parts remain firmly in place under the demanding conditions of truck operation. This screw helps maintain the integrity and performance of truck systems by providing a reliable fastening solution ².

Key Features

The 3904071 Hexagon Head Cap Screw is distinguished by several key features that enhance its performance and durability. Its design includes a hexagonal head for secure tool engagement, a threaded shaft for strong component attachment, and a cap at the end to cover and protect the fastener. The screw is typically made from high-strength materials, such as alloy steel, to withstand the rigors of truck operation. Additionally, it may feature coatings or treatments to improve resistance to wear and corrosion, extending its service life in harsh environments ³.

Benefits

Using the 3904071 Hexagon Head Cap Screw offers several benefits. Its robust design and material composition contribute to improved reliability in truck systems, reducing the likelihood of fastener failure. The screw’s ease of installation, thanks to its hexagonal head, allows for efficient assembly and maintenance procedures. Furthermore, its resistance to wear and corrosion ensures long-lasting performance, even in challenging operating conditions ⁴.

Installation and Usage

Proper installation of the 3904071 Hexagon Head Cap Screw is crucial for ensuring secure and lasting fastening. It is recommended to follow torque specifications provided by the manufacturer to achieve the correct tension without overtightening, which could damage the screw or the components being fastened. Using the appropriate wrench or socket for the screw’s size ensures precise torque application and prevents damage to the hexagonal head.

Troubleshooting and Maintenance

Common issues with the 3904071 Hexagon Head Cap Screw, such as loosening or corrosion, can often be addressed through regular inspection and maintenance. If a screw appears loose, it should be retightened to the specified torque. In cases of corrosion, cleaning the affected area and applying a corrosion-resistant coating can help prevent further degradation. Regular maintenance checks can identify potential issues early, allowing for timely corrections and prolonging the screw’s service life.

Cummins: Manufacturer Overview

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 a reputation for quality, reliability, and innovation in the commercial truck industry. The company’s extensive product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of commercial vehicle applications. Cummins’ commitment to excellence and customer satisfaction has made it a preferred choice among truck manufacturers and fleet operators worldwide.

Hexagon Head Cap Screw 3904071 Compatibility with Cummins Engines

The Cummins part number 3904071, a Hexagon Head Cap Screw, is designed to fit a variety of Cummins engines. This screw is integral in securing various components within the engine, ensuring structural integrity and operational efficiency. Below is a detailed breakdown of its compatibility across different engine models:

4B3.9 and QSB3.9 30 CM550

The 3904071 screw is compatible with the 4B3.9 and QSB3.9 30 CM550 engines. These engines are known for their reliability and performance in various applications, from agricultural to industrial use. The screw’s role in these engines includes securing the engine block, cylinder heads, and other critical components, ensuring they remain tightly fastened and properly aligned.

6B5.9 and QSB5.9 30 CM550

For the 6B5.9 and QSB5.9 30 CM550 engines, the 3904071 screw is also a perfect fit. These engines are part of the Cummins QSB series, which is renowned for its power and durability. The screw’s application in these engines is crucial for maintaining the structural integrity of the engine block and other vital parts, ensuring smooth operation and longevity.

6C8.3 and C8.3 G

The 3904071 Hexagon Head Cap Screw is also compatible with the 6C8.3 and C8.3 G engines. These engines are designed for heavy-duty applications, providing robust performance in demanding environments. The screw’s use in these engines is essential for securing various components, including the engine block and other critical parts, ensuring they remain securely fastened and properly aligned.

B4.5, B5.9 G, and B5.9 GAS PLUS CM556

The 3904071 screw is also suitable for the B4.5, B5.9 G, and B5.9 GAS PLUS CM556 engines. These engines are part of the Cummins B series, known for their versatility and efficiency. The screw’s application in these engines is vital for securing the engine block, cylinder heads, and other components, ensuring they remain tightly fastened and properly aligned.

In summary, the 3904071 Hexagon Head Cap Screw is a versatile and essential component for a range of Cummins engines, ensuring the secure fastening of critical parts and maintaining the engine’s structural integrity.

Role of Part 3904071 Hexagon Head Cap Screw in Engine Systems

The part 3904071 Hexagon Head Cap Screw is instrumental in the assembly and operation of various engine components, particularly within the refrigeration and air conditioning systems.

In the compressor unit, this screw is often used to secure the mounting brackets that hold the compressor in place. Its hexagonal head allows for firm and precise tightening, ensuring that the compressor remains stable during operation. This stability is essential for the efficient compression of refrigerant or freon, which is vital for the cooling process.

When it comes to the refrigerant compressor, the Hexagon Head Cap Screw plays a similar role. It is used to fasten components that are subject to significant mechanical stress and vibration. The screw’s design ensures a secure fit, which is necessary for maintaining the integrity of the refrigerant flow and pressure within the system.

Additionally, in the mounting of various components within the engine system, the 3904071 screw provides the necessary tension to keep parts aligned and functioning correctly. This is particularly important in systems where precise alignment is required to prevent leaks and ensure efficient operation.

Overall, the 3904071 Hexagon Head Cap Screw is a key component in maintaining the structural integrity and operational efficiency of engine systems involving compressors and refrigerants.

Conclusion

The 3904071 Hexagon Head Cap Screw is a critical component in the assembly and maintenance of commercial truck systems, particularly within Cummins engines. Its robust design, ease of installation, and resistance to wear and corrosion make it an essential part for ensuring the reliability and performance of truck systems. Proper installation and regular maintenance are key to maximizing the screw’s service life and ensuring the secure fastening of critical components.