3910540
Hexagon Flange Head Cap Screw
Cummins®

This article provides an overview of the Cummins Hexagon Flange Head Cap Screw, part number 3910540. It covers the basic concepts, purpose, key features, benefits, and maintenance suggestions for this component, which is used in commercial trucks.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by a hexagonal head with a flange. The flange provides additional surface area for torque application and helps prevent the screw from being driven too far into the material. These screws are commonly used in applications requiring a combination of high strength and resistance to loosening ³.

Purpose and Function

The 3910540 Hexagon Flange Head Cap Screw by Cummins is designed for use in commercial trucks. It plays a role in securing various components and assemblies within the truck’s structure. The screw ensures that parts remain firmly attached, contributing to the overall integrity and safety of the vehicle ¹.

Key Features

• Hexagonal head for easy tightening with standard tools.
• Flange provides additional torque application surface and prevents over-driving.
• High-strength material construction suitable for heavy-duty applications.
• Designed to withstand significant stress and vibration common in truck operations.

Benefits

• Enhanced security of fastened components due to the flange design.
• Improved torque application efficiency.
• Durable construction ensures long-term reliability in demanding environments.
• Reduces the likelihood of screw loosening over time ².

Troubleshooting and Maintenance

Regular inspection of the Hexagon Flange Head Cap Screws is recommended to ensure they remain tight and secure. Signs of wear or damage should be addressed promptly to prevent failure. Proper torque specifications should be followed during installation to avoid over-tightening or under-tightening. In case of corrosion, screws should be replaced to maintain structural integrity ³.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. The company is known for its commitment to quality and innovation in the automotive and heavy-duty truck industries.

Hexagon Flange Head Cap Screw 3910540 in Cummins Engines

The Cummins part number 3910540, a Hexagon Flange Head Cap Screw, is a critical component used in various Cummins engines. This screw is designed to provide secure fastening in applications where high strength and durability are essential. Below is a detailed description of how this part fits into different Cummins engine models.

4B3.9, 6B5.9, 6C8.3, B3.9 G, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556

The Hexagon Flange Head Cap Screw 3910540 is utilized in these engines for securing various components, such as covers and housings, ensuring they remain tightly fastened under operational stresses. This screw is particularly important in maintaining the integrity of the engine’s structure.

B6.7 CM2350 B135B, B6.7 CM2670 B153B

In these B6.7 engines, the 3910540 screw is used to fasten critical parts that require a robust connection. Its design allows for easy installation and removal, which is crucial during maintenance procedures.

C GAS PLUS CM556, C8.3 G, G5.9, G5.9 CM558, G8.3

The Hexagon Flange Head Cap Screw is also integral in these engines, providing the necessary strength to hold components securely. Its flange head design ensures a large surface area for torque application, which is essential for high-stress applications.

ISB CM550, ISB CM850, ISB/ISD4.5 CM2150 B119, ISB/ISD6.7 CM2150 SN, ISB3.9 CM2220 B107, ISB5.9 CM2880 B127, ISB5.9G CM2180

In the ISB series engines, the 3910540 screw is used extensively for fastening various parts, including intake and exhaust manifolds, cylinder heads, and other critical components. Its high strength and durability make it ideal for these demanding applications.

ISBE CM2150, ISBE CM800, ISBE4 CM850, ISC CM2150

For the ISBE and ISC engines, the Hexagon Flange Head Cap Screw 3910540 is used to secure components that are exposed to high temperatures and pressures. The screw’s design ensures that these parts remain tightly fastened, contributing to the overall reliability and performance of the engine.

Role of Part 3910540 Hexagon Flange Head Cap Screw in Engine Systems

The Hexagon Flange Head Cap Screw, identified as part 3910540, is integral to the assembly and securement of various components within engine systems. Its application spans across multiple subsystems, ensuring the stability and functionality of the engine.

Accessories and Adapters

In the realm of engine accessories, the Hexagon Flange Head Cap Screw is utilized to fasten adapters that connect different components. These adapters may include those for the fuel system, ensuring a secure and leak-free connection between the fuel pump and the fuel filter. Similarly, in the front drive system, it secures adapters that facilitate the transfer of power from the engine to the front gear train accessories.

Alternator and Engine Lubrication

At the alternator location, this screw plays a role in the alternator mounting arrangement, securing the alternator to the engine block. This ensures efficient power generation and distribution. In the engine lubrication system, it is used to connect the primer to the lubricating oil filter head, guaranteeing that the lubrication process is uninterrupted and effective.

Exhaust and Water Systems

The Hexagon Flange Head Cap Screw is also pivotal in the exhaust system, where it secures the connection at the exhaust outlet. This ensures that exhaust gases are efficiently directed away from the engine. In the water system, it is used at the water inlet connection, securing the pump to the engine, which is essential for cooling and maintaining optimal engine temperature.

Noise Reduction and Vibration Isolation

In noise reduction devices and vibration isolators, this screw is employed to secure components that minimize engine noise and isolate vibrations, contributing to a smoother operation and reduced wear on engine parts.

Fuel and Lubrication Systems

Within the fuel system, the screw is used to secure the fuel pump and the fuel module, ensuring a stable fuel supply to the engine. In the lubrication system, it connects the pump to the oil reserve, facilitating the circulation of lubricating oil throughout the engine.

Cooling and Monitoring Systems

For the auxiliary cooling system and the engine monitoring system, the Hexagon Flange Head Cap Screw is utilized to secure components that regulate engine temperature and monitor engine performance, respectively. This ensures that the engine operates within safe parameters.

Conclusion

Overall, the Hexagon Flange Head Cap Screw (part 3910540) is a fundamental component in maintaining the structural and functional integrity of various engine systems. Its widespread application across different subsystems underscores its importance in engine assembly and operation.