3975555
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3975555 and manufactured by Cummins, is a specialized fastener designed for use in commercial truck maintenance. Cummins, a renowned name in the automotive industry, produces this component to meet the demanding requirements of heavy-duty applications. This screw is integral to ensuring the secure assembly of various truck components, contributing to the overall reliability and performance of commercial vehicles ¹.

Basic Concepts

A Hexagon Flange Head Cap Screw is characterized by its hexagonal head, which provides a larger surface area for torque application, and a flange that sits against the fastened material to distribute load and prevent the screw from pulling through. This design enhances the screw’s functionality within mechanical systems by offering a secure and stable fastening solution. The screw threads into the material, creating a strong connection that is resistant to loosening under vibration and stress ².

Purpose and Role in Truck Operation

This Cummins part plays a significant role in the operation and maintenance of commercial trucks. It is utilized in various truck components where secure fastening is required. This includes, but is not limited to, engine components, chassis parts, and body panels. Its application ensures that critical components remain securely attached, contributing to the truck’s structural integrity and operational efficiency ³.

Key Features

The 3975555 boasts several key features that enhance its performance and durability. Its hexagonal flange head design allows for efficient torque application, reducing the risk of cam-out during installation. The screw is composed of high-strength materials, ensuring it can withstand the rigors of heavy-duty use. Additionally, its unique attributes, such as corrosion resistance and high tensile strength, contribute to its longevity and reliability in demanding environments ⁴.

Benefits

The benefits of using the 3975555 include improved fastening security, resistance to vibration loosening, and ease of installation and removal. Its design ensures a tight and stable connection, minimizing the risk of component failure due to loosening. The screw’s ease of use with standard tools makes it a practical choice for both initial installation and maintenance tasks.

Installation and Usage

Proper installation of the 3975555 involves adhering to specific torque specifications to ensure a secure connection without over-tightening, which could damage the screw or the fastened material. Recommended tools include a torque wrench for precise application of torque. Best practices for installation include cleaning the fastening area to remove debris and ensuring the screw is aligned correctly with the hole to prevent cross-threading.

Troubleshooting and Maintenance

Common issues with the 3975555, such as loosening or corrosion, can often be addressed through regular inspection and maintenance. Ensuring that screws are tightened to the correct torque specification during installation can prevent loosening. Corrosion can be mitigated by applying a suitable protective coating or using screws made from corrosion-resistant materials. Regular checks during maintenance intervals can help identify and address any issues before they lead to component failure.

Manufacturer - Cummins

Cummins is a well-established manufacturer in the automotive industry, known for its commitment to producing high-quality truck components. With a history of innovation and excellence, Cummins has built a reputation for reliability and performance. The company’s dedication to quality is evident in the design and manufacturing of the 3975555, ensuring it meets the high standards required for commercial truck applications.

Hexagon Flange Head Cap Screw 3975555 Compatibility with Cummins Engines

The Cummins part number 3975555, a Hexagon Flange Head Cap Screw, is designed to fit a variety of Cummins engines. This screw is integral in securing various components within the engine assembly, ensuring structural integrity and operational efficiency. Below is a detailed breakdown of the engines with which this part is compatible:

Cummins 4 Series Engines

• 4B3.9
• B3.3
• B4.5
• B4.5 CM2350 B129B
• B5.9 CM2670 B166C
• B5.9 G
• B5.9 GAS PLUS CM556

Cummins 6 Series Engines

• 6B5.9
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125

Cummins D Series Engines

• D4.0 CM2620 D103B

Cummins F Series Engines

• F3.8 CM2350 F120B
• F3.8 CM2620 F137B
• F3.8 F102
• F4.5 CM2620 F139B

Cummins ISB/ISD Series Engines

• ISB CM550
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB3.9 CM2220 B107
• ISB4.5 CM2350 B104
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B127

The Hexagon Flange Head Cap Screw 3975555 is meticulously engineered to meet the stringent requirements of Cummins engines, ensuring a secure fit and reliable performance across these diverse engine models.

Role of Part 3975555 Hexagon Flange Head Cap Screw in Engine Systems

In the intricate assembly of engine systems, the 3975555 is employed in various applications to ensure secure and reliable connections. This screw is particularly valuable in scenarios where vibration resistance and a robust fastening solution are required.

Alternator Mounting

When mounting an alternator, the Hexagon Flange Head Cap Screw is utilized to attach the alternator to the engine block or bracket. Its flange head design provides a larger surface area, which distributes the clamping force more evenly, reducing the risk of damage to the alternator housing and enhancing the stability of the mounting.

Drive Systems

In drive systems, whether it’s for the fan or water pump, the Hexagon Flange Head Cap Screw plays a significant role. It is often used to secure the drive components to the engine, ensuring that the rotational forces are effectively transmitted without slippage. The screw’s design helps in maintaining alignment and integrity under dynamic operating conditions.

Fan Drive

For the fan drive mechanism, the Hexagon Flange Head Cap Screw is integral in attaching the fan to its housing or the engine. This ensures that the fan operates efficiently, providing the necessary cooling for the engine. The screw’s resistance to loosening under vibration is particularly beneficial in this application.

Water Pump Mounting

In the context of water pump mounting, the Hexagon Flange Head Cap Screw is employed to fasten the water pump to the engine block. This is essential for maintaining a sealed and secure connection, which is vital for the proper circulation of coolant throughout the engine system. The screw’s flange head also aids in preventing leaks by providing a tight seal.

General Mounting Applications

Across various mounting applications within the engine system, the Hexagon Flange Head Cap Screw is a preferred choice due to its ability to withstand high torque and resist loosening. Whether it’s securing an alternator, a drive component, or a fan, this screw ensures that all parts remain firmly in place, contributing to the overall reliability and performance of the engine.

Conclusion

The 3975555 Hexagon Flange Head Cap Screw is a critical component in the maintenance and operation of commercial trucks and Cummins engines. Its design, featuring a hexagonal head and flange, ensures secure and stable fastening, resistant to vibration and stress. The screw’s compatibility with a wide range of Cummins engines underscores its versatility and importance in engine systems. Proper installation and maintenance practices are essential to maximize the benefits of this Cummins part, ensuring the reliability and performance of commercial vehicles.