3400876
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, part number 3400876, manufactured by Cummins, is a specialized fastener designed for use in commercial trucks. This part is integral to the assembly and maintenance of various truck components, ensuring secure and reliable fastening in demanding operational environments. Cummins, a well-established name in the commercial truck industry, produces this component with a focus on durability and performance ¹.

Basic Concepts

Hexagon Flange Head Cap Screws are engineered with a hexagonal head and a flanged base. The hexagonal head allows for efficient torque application using standard tools, while the flange provides additional surface area to distribute clamping force, reducing the risk of the screw head sinking into softer materials ². These screws play a role in fastening and securing components by providing a strong, stable connection that can withstand significant stress and vibration.

Purpose and Role in Truck Operation

The 3400876 Hexagon Flange Head Cap Screw is specifically designed to meet the rigorous demands of commercial truck operations. It is used in various applications across truck systems, including engine components, chassis assemblies, and body attachments. This screw supports critical systems by ensuring that parts remain securely fastened, which is vital for the safe and efficient operation of the vehicle ³.

Key Features

The 3400876 Hexagon Flange Head Cap Screw features a hexagonal head that facilitates easy and precise torque application. The flange at the base of the screw head enhances the distribution of clamping force, which helps prevent damage to the fastened material. Additionally, the screw is typically made from high-strength materials, ensuring it can endure the heavy-duty conditions encountered in commercial trucking ⁴.

Benefits

The design of the 3400876 Hexagon Flange Head Cap Screw offers several advantages. Its hexagonal head allows for consistent and reliable torque application, which is crucial for maintaining proper tension in fastenings. The flange feature enhances resistance to loosening, even under dynamic loads and vibrations common in truck operations. Furthermore, the material composition of the screw contributes to its durability, making it suitable for long-term use in demanding environments ⁵.

Installation and Usage

Proper installation of the 3400876 Hexagon Flange Head Cap Screw is vital to ensure secure fastening. It is recommended to use the appropriate torque settings specified by the manufacturer to achieve the desired clamping force without over-tightening, which could lead to damage. Best practices include using the correct tools and ensuring that the surfaces to be fastened are clean and free from debris to maximize the effectiveness of the screw ⁶.

Troubleshooting and Maintenance

Common issues with the 3400876 Hexagon Flange Head Cap Screw may include corrosion, stripping, or loosening. Regular inspection and maintenance can help identify these problems early. To address corrosion, cleaning the affected area and applying a suitable corrosion-resistant coating may be necessary. If stripping occurs, replacing the damaged screw is typically the best course of action. Ensuring that screws are properly torqued during installation can help prevent loosening over time ⁷.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing reliable and high-performance components. The company’s extensive product portfolio and commitment to innovation make it a trusted manufacturer of critical truck parts, including the 3400876 Hexagon Flange Head Cap Screw ⁸.

Hexagon Flange Head Cap Screw in Engine Systems

The Hexagon Flange Head Cap Screw, identified by part number 3400876, is integral in securing various components within engine systems. Its design allows for efficient torque transfer and secure fastening, which is essential for maintaining the integrity and performance of the engine ⁹.

Pan Assembly Integration

In the pan assembly of an engine, the Hexagon Flange Head Cap Screw is utilized to fasten the pan to the engine block. This connection is vital for containing engine oil and ensuring that the pan remains securely attached during operation. The flange head of the screw provides additional surface area for distribution of clamping force, reducing the risk of pan deformation and ensuring a leak-free seal ¹⁰.

Oil System Components

Within the oil system, the Hexagon Flange Head Cap Screw plays a significant role in attaching oil filters, oil pumps, and various oil passages. For oil filters, the screw ensures a tight seal, preventing oil leaks and maintaining filtration efficiency. In oil pumps, it secures the pump housing, which is essential for consistent oil pressure and lubrication throughout the engine. Additionally, in oil passages, the screw helps in maintaining the structural integrity of the passages, ensuring smooth oil flow and reducing the likelihood of oil starvation in critical engine components ¹¹.

Conclusion

The 3400876 Hexagon Flange Head Cap Screw is a vital component in the assembly and maintenance of commercial truck engines. Its robust design, featuring a hexagonal head and flanged base, ensures efficient torque application and secure fastening, which are critical for the integrity and performance of engine systems. Proper installation and maintenance of this part are essential to ensure long-term reliability and performance in demanding operational environments.