3905372
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3905372, is a component manufactured by Cummins, a prominent name in the commercial truck industry. This screw is integral to the assembly and maintenance of commercial trucks, ensuring the secure fastening of various components. Its design and functionality are tailored to meet the demanding requirements of heavy-duty applications.

Basic Concepts and Functionality

Hexagon Flange Head Cap Screws are designed to provide a secure and stable connection in mechanical systems. The hexagonal shape of the flange head allows for efficient torque application using standard tools, facilitating easy installation and removal. Within the context of truck mechanics, these screws play a role in joining components that are subject to significant stress and vibration, ensuring that the assemblies remain intact under operational conditions ¹.

Purpose and Role in Truck Operation

The 3905372 Hexagon Flange Head Cap Screw serves a specific purpose in truck mechanics by securing critical components and contributing to the structural integrity of the vehicle. It is commonly used in applications where a combination of strength, durability, and ease of installation is required. Examples of its use include fastening engine components, securing chassis parts, and attaching body panels.

Key Features

The 3905372 Hexagon Flange Head Cap Screw is characterized by several key features that enhance its performance and durability. These include a robust material composition, typically a grade of steel that offers high tensile strength, a thread type designed for optimal grip and resistance to loosening, and a flange design that distributes load and prevents the screw from sinking into the material it fastens.

Benefits

Utilizing the 3905372 Hexagon Flange Head Cap Screw offers several advantages. Its design contributes to reliability in fastening applications, ensuring that components remain securely attached throughout the vehicle’s operational life. The screw’s ease of installation reduces maintenance time, and its resistance to loosening under vibration enhances safety and performance.

Installation and Usage Guidelines

Proper installation of the Hexagon Flange Head Cap Screw involves selecting the correct size and grade for the application, ensuring the mating surfaces are clean and free of debris, and applying the appropriate torque to achieve a secure fastening without over-tightening. Best practices include periodic inspection of the screw and its fastening to ensure continued integrity and performance.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws include loosening due to vibration, corrosion in exposed applications, and damage from over-tightening. Regular inspection and maintenance can help identify these issues early. Replacement may be necessary if corrosion is significant, or if the screw shows signs of damage or fatigue.

Cummins: Manufacturer Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions. With a history of innovation and quality, Cummins has established a strong reputation in the commercial truck industry. The company’s commitment to excellence is reflected in its product range, which includes engines, filtration systems, and aftermarket parts designed to meet the rigorous demands of heavy-duty applications.

Regulatory and Safety Considerations

The use of Hexagon Flange Head Cap Screws in commercial trucks is subject to various regulatory standards that ensure safety and performance. These standards dictate material properties, thread specifications, and testing protocols to verify compliance. Adhering to these regulations is crucial for maintaining vehicle safety and operational reliability.

Case Studies and Real-World Applications

The 3905372 Hexagon Flange Head Cap Screw has been utilized across various truck models, demonstrating its versatility and reliability in real-world applications. Fleet operators and mechanics have reported positive experiences with the screw, highlighting its ease of use, durability, and effectiveness in securing critical components under demanding conditions.

Hexagon Flange Head Cap Screw Part 3905372 in Cummins Engines

The Hexagon Flange Head Cap Screw part number 3905372, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is designed to secure different parts within the engine assembly, ensuring structural integrity and operational efficiency. Here is a detailed look at how this part fits into the Cummins engine lineup:

ISB Series Engines

The ISB series engines, which include models such as ISB CM2150, ISB CM550, ISB CM850, ISB/ISD4.5 CM2150 B119, ISB/ISD6.7 CM2150 SN, ISB6.7 CM2250, ISB6.7 CM2350 B101, ISB6.7 G CM2180 B118, and ISBE CM2150, utilize the 3905372 screw in various capacities. This screw is often used to fasten components such as cylinder heads, intake manifolds, and exhaust manifolds, ensuring these parts remain securely in place under high operational stresses.

ISL Series Engines

In the ISL series engines, specifically the ISL CM2150 and ISL9 CM2250, the 3905372 screw is employed to secure critical engine components. These engines benefit from the screw’s robust design, which helps maintain the alignment and stability of parts such as the turbocharger housing and other critical engine mounts.

ISBE Series Engines

The ISBE series engines, including ISBE CM800 and ISBE4 CM850, also incorporate the 3905372 screw. This part is used in securing various engine components, ensuring that the engine’s internal parts remain tightly fastened and properly aligned, which is crucial for the engine’s overall performance and longevity.

ISC Series Engines

The ISC8.3 CM2250 engine utilizes the 3905372 screw to fasten components such as the cylinder head and other critical engine mounts. This ensures that the engine’s internal parts remain securely fastened, contributing to the engine’s reliability and efficiency.

ISF Series Engines

In the ISF2.8 CM2220 F129 engine, the 3905372 screw is used to secure various components, ensuring that the engine’s internal parts remain tightly fastened and properly aligned.

QSB Series Engines

The QSB4.5 CM2250 EC and QSB4.5 CM850(CM2850) engines use the 3905372 screw to fasten components such as the cylinder head and other critical engine mounts. This ensures that the engine’s internal parts remain securely fastened, contributing to the engine’s reliability and efficiency.

Other Cummins Engines

Other Cummins engines, such as the B5.9 G, B5.9 GAS PLUS CM556, G8.3, and K50, also incorporate the 3905372 screw in their design. This screw is used to secure various components, ensuring that the engine’s internal parts remain tightly fastened and properly aligned.

Role of Part 3905372 Hexagon Flange Head Cap Screw in Engine Systems

The Hexagon Flange Head Cap Screw, identified as part 3905372, is integral to the assembly and securement of various components within engine systems. Its application spans across multiple areas, ensuring the stability and functionality of the engine’s intricate parts.

In the front drive arrangement, this screw is utilized to fasten the front gear housing to the engine crankshaft, providing a secure connection that withstands the dynamic forces generated during operation. Similarly, in the rear gear housing, it plays a pivotal role in maintaining the structural integrity of the assembly.

Within the fuel system, specifically at the fuel pump mounting, the Hexagon Flange Head Cap Screw ensures the pump is firmly attached to the engine, preventing any movement that could disrupt fuel delivery. Its use extends to the oil fill and charge air bypass plumbing, where it secures connections, ensuring a leak-free system that maintains the engine’s lubrication and air management efficiency.

The screw is also vital in the exhaust recirculation air arrangement, where it secures components that play a key role in reducing emissions. In the water inlet and radiator support, it ensures the cooling system’s components are tightly fastened, crucial for maintaining optimal engine temperature.

Furthermore, in the turbocharger and fan assemblies, the Hexagon Flange Head Cap Screw is employed to secure these high-speed rotating components, ensuring they operate within their designed parameters without undue vibration or movement.

In corrosion-resistant applications, such as the marine engine or components exposed to harsh environments, this screw’s role is to provide a durable fastening solution that resists the degrading effects of moisture and salt.

Lastly, in transmission and front engine mounting, the screw ensures these critical components are securely attached to the engine frame, contributing to the overall stability and performance of the engine system.

Conclusion

The 3905372 Hexagon Flange Head Cap Screw is a versatile and essential component in many Cummins engine models, ensuring the secure fastening of critical engine components and contributing to the overall performance and reliability of the engines. Its robust design, ease of installation, and resistance to loosening under vibration make it a preferred choice for heavy-duty applications in the commercial truck industry.