3974724
Hexagon Head Cap Screw
Cummins®

The Cummins 3974724 Hexagon Head Cap Screw is a specialized fastener designed for use in commercial trucks. Manufactured by Cummins Inc., a leading name in the diesel engine and power generation industries, this screw serves a significant role in the assembly and maintenance of truck components. Its design and material composition are tailored to meet the demanding requirements of heavy-duty applications.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of bolt characterized by its hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. The screw’s design includes a threaded shaft that engages with the internal threads of a nut or a tapped hole, providing a secure fastening solution. In commercial truck applications, these screws are used to join various components, ensuring structural integrity and reliable performance under significant stress and vibration ¹.

Role of the 3974724 Hexagon Head Cap Screw in Truck Operation

This Cummins part plays a specific role in the operation and maintenance of commercial trucks by securing critical components. It is often used in areas where high tensile strength and resistance to loosening are required, such as in engine mounts, chassis assemblies, and other structural connections. The screw’s design ensures that these connections remain secure, contributing to the overall safety and efficiency of the vehicle ².

Key Features

The Cummins 3974724 Hexagon Head Cap Screw features a hexagonal head that provides a firm grip for tools, facilitating easy installation and removal. It is made from high-quality materials, typically alloy steel, which offers excellent strength and durability. The screw’s threading is precision-cut to ensure a tight and secure fit, reducing the risk of loosening over time. Additionally, the screw may be coated or treated to enhance corrosion resistance, making it suitable for use in various environmental conditions ³.

Benefits

This Cummins part offers several benefits that make it well-suited for commercial truck applications. Its durable material composition ensures long-lasting performance, even under heavy loads and harsh conditions. The screw’s corrosion-resistant properties help protect it from rust and degradation, extending its service life. Furthermore, the hexagonal head design allows for straightforward installation and removal, reducing maintenance time and effort.

Installation and Usage

Proper installation of the 3974724 Hexagon Head Cap Screw is crucial for ensuring its effectiveness and longevity. It should be installed using the appropriate torque specifications to achieve the correct tension without overtightening, which could damage the screw or the surrounding components. Using the right tools, such as a torque wrench, helps ensure that the screw is secured to the manufacturer’s recommended torque settings. Regular inspection and re-tightening may be necessary to maintain the integrity of the fastening.

Troubleshooting and Maintenance

Common issues with the 3974724 Hexagon Head Cap Screw may include loosening due to vibration, corrosion, or damage from improper installation. Regular maintenance checks should be performed to identify any signs of wear or corrosion. If a screw appears loose, it should be re-tightened to the specified torque. In cases of significant corrosion or damage, the screw may need to be replaced to ensure the continued safety and performance of the truck.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Founded in 1919, Cummins has a long-standing reputation for innovation, quality, and reliability in the commercial truck industry. The company offers a wide range of products and services designed to meet the needs of customers in various sectors, including transportation, construction, agriculture, and power generation. Cummins’ commitment to excellence is reflected in its high-quality components, such as the 3974724 Hexagon Head Cap Screw, which are engineered to perform reliably in demanding applications.

Cummins Hexagon Head Cap Screw 3974724 in Engine Applications

The Cummins Hexagon Head Cap Screw, part number 3974724, is a critical component in various Cummins engine configurations. This screw is designed to provide robust fastening solutions, ensuring secure connections in high-stress environments. Its application spans across several engine models, where it plays a pivotal role in maintaining structural integrity and operational efficiency.

Engine Group: 6B5.9

In the 6B5.9 engine series, the 3974724 screw is utilized in several key areas. It is often found securing components within the engine block, ensuring that parts remain tightly fastened under the extreme conditions of engine operation. This screw’s design, with its hexagonal head, allows for efficient torque application, which is crucial for maintaining the alignment and stability of various engine parts. The precision engineering of the 3974724 screw ensures that it can withstand the high temperatures and pressures typical in engine environments, contributing to the overall reliability and longevity of the engine.

Engine Group: Other Cummins Engines

Beyond the 6B5.9 series, the 3974724 screw is also integral to other Cummins engine models. Its application extends to securing various engine components, including but not limited to, the cylinder head, intake manifold, and exhaust systems. The screw’s ability to maintain a tight grip even under fluctuating engine conditions makes it an essential part of the engine assembly. Its use in these applications underscores its importance in ensuring that the engine operates smoothly and efficiently, with minimal risk of component failure due to loosening or misalignment.

Role of Part 3974724 Hexagon Head Cap Screw in Engine Systems

Generator Systems

In generator systems, the 3974724 Hexagon Head Cap Screw is instrumental in securing various components that contribute to the generator’s overall functionality and stability. It is commonly used to fasten stator and rotor assemblies, ensuring they remain firmly in place during operation. This screw also plays a part in attaching the generator’s housing to the engine frame, providing structural integrity and preventing vibrations that could lead to performance issues. Additionally, it secures electrical components such as terminals and connectors, ensuring reliable electrical connections and safe operation.

Main Engine Systems

Within main engine systems, the 3974724 Hexagon Head Cap Screw is vital for maintaining the integrity of both mechanical and electrical components. It is often employed to fasten engine covers, ensuring they are securely attached to prevent oil leaks and protect internal components from contaminants. The screw also plays a role in attaching critical engine components such as fuel injectors, ensuring they are properly aligned and sealed. Furthermore, it is used in the assembly of the engine’s electrical system, securing sensors, wiring harnesses, and control modules, which are essential for precise engine management and performance monitoring.

Conclusion

The Cummins 3974724 Hexagon Head Cap Screw is a critical component in the assembly and maintenance of commercial trucks and Cummins engines. Its robust design, high-quality materials, and precision engineering make it well-suited for demanding applications. Proper installation, regular maintenance, and timely replacement are essential to ensure the continued safety and performance of the vehicle.