3901757
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3901757 and manufactured by Cummins, is a specialized fastener designed for use in commercial trucks. This screw is significant due to its robust design and the reputable manufacturer behind it. The screw’s hexagonal head and flange design are tailored for heavy-duty applications, ensuring secure fastening in the demanding environments typical of commercial trucking.

Basic Concepts

The Hexagon Flange Head Cap Screw is engineered with a hexagonal head, which allows for efficient torque application using standard tools. The flange at the base of the head provides additional surface area, enhancing the screw’s resistance to loosening under vibration. Typically constructed from high-strength steel, this screw is designed to withstand the substantial loads and stresses encountered in truck assemblies. Its function within a truck’s assembly is to securely fasten components, ensuring structural integrity and reliable performance.

Purpose and Role

This Cummins part serves a specific purpose in the operation of a truck by providing a secure connection between various components. It plays a role in maintaining the structural integrity of the truck’s assembly, ensuring that parts remain firmly attached under operational stress. This contributes to the overall functionality and performance of the vehicle by preventing component misalignment or failure due to fastening issues.

Key Features

Key features of the Hexagon Flange Head Cap Screw include its hexagonal head design, which facilitates easy and precise tightening with standard tools. The flange characteristic offers additional resistance to loosening, which is crucial in the vibrating environment of a commercial truck. As a cap screw, it is designed for through-bolting applications, where it passes completely through the joined parts and is secured with a nut on the opposite side. These features collectively enhance the screw’s performance and reliability in heavy-duty applications.

Benefits

The Hexagon Flange Head Cap Screw offers several benefits, including improved fastening strength due to its design and material properties. Its resistance to loosening ensures that connections remain secure over time, even under the dynamic conditions of truck operation. Additionally, the screw’s durability in demanding environments contributes to the efficiency and safety of commercial trucks by reducing the need for frequent maintenance or replacement.

Installation and Usage

Proper installation of the Hexagon Flange Head Cap Screw involves adhering to specified torque values to ensure the screw is tightened to the correct tension without over-tightening, which could lead to damage. Tightening procedures should follow manufacturer guidelines to achieve optimal performance and longevity. Best practices include using the correct tools for application and periodically checking the tightness of the screw to maintain secure fastening.

Troubleshooting and Maintenance

Common issues with the Hexagon Flange Head Cap Screw, such as loosening, corrosion, or damage, can often be addressed through regular inspection and maintenance. Troubleshooting may involve re-tightening the screw to the specified torque or replacing it if corrosion or damage is detected. Maintenance tips include protecting the screw from environmental factors that could lead to corrosion and ensuring it is not over-tightened during installation.

Cummins Overview

Cummins Inc. is a leading manufacturer in the automotive industry, known for its commitment to quality and innovation. With a history of producing reliable and high-performance components, Cummins plays a significant role in supplying parts like the Hexagon Flange Head Cap Screw for commercial trucks. Their reputation for quality ensures that components meet the rigorous demands of heavy-duty applications, contributing to the safety and efficiency of commercial vehicles.

Hexagon Flange Head Cap Screw 3901757 in Cummins Engines

The Hexagon Flange Head Cap Screw part number 3901757, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is designed to secure and hold parts together, ensuring the integrity and functionality of the engine.

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

These engines utilize the 3901757 screw in various applications, primarily for fastening components that require a robust and reliable connection. The screw’s design ensures that it can withstand the high stresses and torques encountered in engine operations.

C GAS PLUS CM556, C8.3 G

The 3901757 screw is also integral in the C GAS PLUS CM556 and C8.3 G engines. Its use in these models highlights its versatility and effectiveness in maintaining the structural integrity of the engine components.

F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F4.5 CM2620 F139B, F4.5 CM2620 F141C

In the F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F4.5 CM2620 F139B, and F4.5 CM2620 F141C engines, the 3901757 screw is used to secure specific parts that are critical to the engine’s performance and longevity. Its precision and strength make it an ideal choice for these applications.

G5.9, G5.9 CM558

The G5.9 and G5.9 CM558 engines also incorporate the 3901757 screw in their design. This screw’s ability to provide a tight and secure fit is essential for the proper functioning of these engines, ensuring that all connected parts remain stable under operational conditions.

The consistent use of the 3901757 Hexagon Flange Head Cap Screw across these Cummins engine models underscores its importance in maintaining the structural and operational integrity of the engines.

Role of Part 3901757 Hexagon Flange Head Cap Screw in Engine Systems

The part 3901757 Hexagon Flange Head Cap Screw is instrumental in securing and maintaining the integrity of various engine system components. Its applications span across multiple critical areas, ensuring the reliable operation of the engine and its ancillary systems.

Alternator Systems

In alternator systems, the Hexagon Flange Head Cap Screw is used to fasten the alternator drive and secure the alternator in its designated location. This ensures that the alternator remains firmly attached to the engine, allowing it to efficiently convert mechanical energy into electrical energy to power the vehicle’s electrical systems.

Air Systems

For air compressors, whether they handle air or refrigerant, this screw plays a vital role in mounting and securing the compressor to the engine. It ensures that the compressor operates smoothly without undue vibration, which could lead to inefficiencies or damage.

Cooling Systems

In cooling systems, the Hexagon Flange Head Cap Screw is employed in the water inlet connection and the water pump drive pulley. It secures the water pump to the engine, ensuring that coolant is circulated effectively to maintain optimal engine temperature. Additionally, it is used in the connection of the water inlet, guaranteeing a leak-free seal.

Drive Systems

The screw is also fundamental in drive systems, particularly for the alternator, fan, and water pump. It secures the drive components, ensuring they are correctly aligned and operate efficiently. This is essential for the proper functioning of the engine’s ancillary systems.

Flywheel and Housing

In the flywheel housing and harness electronic control module wiring, the Hexagon Flange Head Cap Screw ensures that these components are securely attached. This is important for the reliable operation of the engine’s starting system and the management of electronic controls.

Mounting and Kits

For various mounting applications, such as the fan drive and refrigerant compressor, this screw provides the necessary stability and security. It is also used in installation kits, like the Cent Burn Only Instl and Centinel Make-Up Inst, to ensure that all components are correctly and safely installed.

Long Block and Manifold

In the long block assembly and air intake manifold, the screw helps in securing these components to the engine block. This ensures that the engine operates smoothly and efficiently, with all parts correctly aligned and fastened.

Oil and Water Systems

Finally, in the oil replenishing system and water pump, the Hexagon Flange Head Cap Screw ensures that these systems are securely attached and function correctly. This is essential for maintaining the engine’s lubrication and cooling, which are critical for its longevity and performance.

Conclusion

The 3901757 Hexagon Flange Head Cap Screw is a vital component in the maintenance and operation of commercial trucks and Cummins engines. Its robust design, resistance to loosening, and ability to withstand high stresses make it an essential part for securing various engine components. Proper installation, maintenance, and understanding of its role in engine systems are crucial for ensuring the reliability and performance of commercial vehicles.