3901446
Hexagon Flange Head Cap Screw
Cummins®

Introduction

The 3901446 Hexagon Flange Head Cap Screw, manufactured by Cummins, is a specialized fastener designed for robust fastening applications. This part features a hexagonal head, a flange, and a threaded shank, each contributing to its overall functionality and reliability in fastening tasks. Understanding its design and purpose is fundamental for its effective use in various applications, particularly in commercial truck operations.

Design and Construction

The Hexagon Flange Head Cap Screw is characterized by its hexagonal head, which allows for efficient torque application using a wrench or socket. The flange, a flat, circular plate at the head’s base, serves multiple purposes. It distributes the load more evenly across the surface it contacts, reducing the risk of damage to the fastened material. Additionally, the flange prevents the screw from rotating during tightening, ensuring a secure fit. The cap screw construction, with its threaded shank, provides a strong and reliable fastening mechanism, capable of withstanding significant tensile and shear forces ¹.

Function and Application

In commercial truck operations, the Hexagon Flange Head Cap Screw plays a role in securing various components and assemblies within the truck’s structure. Its design makes it suitable for applications where a high degree of fastening security and load distribution is required. The screw is often used in critical areas where the integrity of the fastening is paramount to the safety and performance of the vehicle ².

Key Features

Several key features contribute to the effectiveness of the Hexagon Flange Head Cap Screw:

• Hexagonal Head: Allows for easy and precise application of torque using standard wrenches or sockets.
• Flange: Distributes the load evenly and prevents the screw from rotating during tightening, enhancing the security of the fastening.
• Threaded Shank: Provides a strong and reliable fastening mechanism, capable of withstanding significant forces.

Benefits

The Hexagon Flange Head Cap Screw offers several benefits:

• Enhanced Load Distribution: The flange helps in distributing the load more evenly, reducing the stress on the fastened material.
• Improved Fastening Security: The combination of the flange and the threaded shank ensures a secure and reliable fastening.
• Ease of Installation and Removal: The hexagonal head allows for straightforward installation and removal using common tools.

Installation and Usage

Proper installation of the Hexagon Flange Head Cap Screw is vital for ensuring secure and reliable fastening. It is important to follow torque specifications provided by the manufacturer to avoid over-tightening, which can lead to damage, or under-tightening, which can result in an insecure fastening. Best practices include using the correct wrench or socket size and ensuring the screw is aligned properly with the hole before tightening ³.

Maintenance and Troubleshooting

Regular inspection of the Hexagon Flange Head Cap Screw is recommended to check for signs of wear or damage. Common issues such as loosening or corrosion can be addressed through periodic tightening and the application of appropriate lubricants or coatings. If corrosion is detected, it may be necessary to replace the screw to maintain the integrity of the fastening.

Engines Compatible with 3901446

The 3901446 Hexagon Flange Head Cap Screw is compatible with a wide range of Cummins engines, including but not limited to:

• 15N Series: 15N CM2380 M104B
• 4B Series: 4B3.9, 4B3.9 G
• 6B Series: 6B5.9, 6B5.9 G, 6B5.9 GAS PLUS CM556
• 6C Series: 6C8.3, 6C8.3 G
• B3 Series: B3.9, B3.9 G
• B4 Series: B4.5, B4.5 CM2350 B129B
• B5 Series: B5.6 CM2670 B152B, B5.9 CM2670 B166C, B5.9 CM2670 B164C
• B6 Series: B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C
• C Series: C GAS PLUS CM556
• G Series: G5.9, G5.9 CM558
• F Series: F2.8 CM2620 F135B, F3.8 CM2350 F128C, F4.5 CM2620 F141C
• ISB Series: ISB (Chrysler), ISB CM2150, ISB CM550, ISB CM850

Role of the 3901446 in Engine Systems

The 3901446 Hexagon Flange Head Cap Screw is instrumental in securing and maintaining the integrity of various engine components across multiple systems, ensuring optimal function and secure placement.

Conclusion

The 3901446 Hexagon Flange Head Cap Screw by Cummins is a critical component in the maintenance and operation of various Cummins engines. Its design, featuring a hexagonal head, flange, and threaded shank, ensures secure fastening, enhanced load distribution, and ease of installation and removal. Proper installation, regular maintenance, and understanding its application across different engine systems are essential for maximizing its effectiveness and ensuring the reliability and performance of the engine.