3910901
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3910901 and manufactured by Cummins, is a component of significance in the realm of heavy-duty trucks. Cummins, a well-established name in the automotive industry, is recognized for producing high-quality truck components that enhance the performance and reliability of heavy-duty vehicles.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and a flange beneath the head. This design allows for efficient torque application and provides a larger bearing surface, which helps distribute the load more evenly ¹. In the context of heavy-duty truck components, these screws play a role in securing various parts, ensuring they remain firmly in place under the demanding conditions these vehicles often encounter.

Role in Truck Operation

This Cummins part serves a purpose in the operation of a truck by securing components that are subject to significant stress and vibration. Its applications span across different systems within the truck, including but not limited to, the engine, transmission, and chassis. By providing a secure attachment point, it contributes to the overall stability and functionality of these systems.

Key Features

The 3910901 boasts several key features that make it suitable for heavy-duty applications. Its hexagonal head design allows for easy tightening and loosening using common tools, while the flange offers additional resistance against loosening due to vibration. The material properties of this screw, typically a high-strength alloy, ensure it can withstand the rigors of heavy-duty use, offering durability and reliability.

Benefits

Utilizing this part provides several advantages. Its design contributes to durability, making it less prone to failure under stress. The resistance to loosening ensures that components remain securely fastened, even in the face of significant vibration. Additionally, the ease of installation, thanks to its hexagonal head, allows for quick and efficient assembly or replacement, minimizing downtime.

Installation Process

Installing the 3910901 requires the use of appropriate tools, such as a socket wrench, to ensure it is tightened to the manufacturer’s specified torque settings. It is important to follow best practices during installation, such as cleaning the mating surfaces to ensure a proper fit and using a thread locker where applicable to prevent loosening. Careful attention to these details will help ensure the screw performs its intended function effectively.

Troubleshooting and Maintenance

Common issues with the 3910901 may include loosening over time due to vibration or corrosion. Regular inspection and maintenance, such as checking for proper torque and signs of corrosion, can help identify and address these issues before they lead to failure. If significant wear or damage is observed, considering replacement is advisable to maintain the integrity of the secured components.

Cummins Overview

Cummins is a manufacturer with a rich history in the automotive industry, particularly known for its contributions to the heavy-duty truck sector. The company’s commitment to quality and innovation has established it as a trusted source for truck components, including fasteners like the 3910901. Cummins’ role in the industry is characterized by a dedication to enhancing the performance, efficiency, and reliability of heavy-duty vehicles.

Hexagon Flange Head Cap Screw 3910901 Compatibility with Cummins Engines

The Hexagon Flange Head Cap Screw part number 3910901, manufactured by Cummins, is a versatile component that fits a wide range of Cummins engines. This screw is designed to provide a secure fastening solution in various engine applications, ensuring reliability and durability. Below is a detailed overview of the engines with which this part is compatible.

Compatible Engines

• 4B3.9
• 6B5.9
• 6C8.3
• B4.5
• B5.6 CM2670 B152B
• B5.9 G
• B5.9 GAS PLUS CM556
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 G CMOH6.0 B125
• C GAS PLUS CM556
• C8.3 G
• D4.0 CM2620 D103B
• F3.8 F102
• G8.3
• ISB CM2150
• ISB CM550
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B140
• ISB5.9 CM2880 B149
• ISB5.9G CM2180
• ISB6.7 CM2250
• ISB6.7 G CM2180 B118

Grouping by Engine Series

The Hexagon Flange Head Cap Screw 3910901 is compatible with several Cummins engine series, each with its own set of specifications and applications. Here is a grouping of the engines by series:

• 4B3.9, 6B5.9, 6C8.3, B4.5, B5.6 CM2670 B152B, B5.9 G, B5.9 GAS PLUS CM556, B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 G CMOH6.0 B125, C GAS PLUS CM556, C8.3 G, D4.0 CM2620 D103B, F3.8 F102, G8.3
• ISB Series: ISB CM2150, ISB CM550, ISB/ISD4.5 CM2150 B119, ISB/ISD6.7 CM2150 SN, ISB5.9 CM2880 B110, ISB5.9 CM2880 B140, ISB5.9 CM2880 B149, ISB5.9G CM2180, ISB6.7 CM2250, ISB6.7 G CM2180 B118

This screw is engineered to meet the stringent requirements of Cummins engines, ensuring that it provides a reliable and secure fastening solution across various engine models.

Hexagon Flange Head Cap Screw (Part 3910901) in Engine Systems

The Hexagon Flange Head Cap Screw, identified by part number 3910901, is integral to the assembly and securement of various components within engine systems. Its robust design ensures reliable fastening across a range of applications.

Alternator Systems

In alternator systems, the Hexagon Flange Head Cap Screw is utilized for securing the alternator to its mounting bracket. This ensures the alternator remains firmly in place, allowing for efficient power generation and transfer to the battery. Additionally, it plays a role in the alternator drive arrangement, where it secures the drive belt to the alternator pulley, ensuring smooth operation and consistent power output.

Compressor and Refrigerant Systems

Within compressor and refrigerant systems, this screw is employed to fasten the compressor to its mounting points. This securement is vital for maintaining the structural integrity of the compressor, which is essential for efficient refrigerant circulation and cooling performance.

Water Pump and Cooling Systems

For water pump and cooling systems, the Hexagon Flange Head Cap Screw is used in the mounting of the water pump to the engine block. It also secures the water pump drive pulley, ensuring the pump operates efficiently to circulate coolant throughout the engine, maintaining optimal operating temperatures.

Idler Pulley and Belt Systems

In idler pulley and belt systems, this screw is crucial for attaching idler pulleys to their supports. This securement ensures the idler pulleys maintain proper tension on the drive belts, which is necessary for the efficient operation of auxiliary components such as the alternator, water pump, and air conditioning compressor.

Engine Harness and Electrical Systems

Within engine harness and electrical systems, the Hexagon Flange Head Cap Screw is used to secure sensors, such as the oil pressure sensor, to the engine block. This ensures accurate readings and reliable performance of the engine’s monitoring systems.

Miscellaneous Applications

Beyond these specific applications, the Hexagon Flange Head Cap Screw is also used in the mounting of the starting motor, securing the fan drive to the engine, and attaching various brackets and supports throughout the engine compartment. Its versatility and strength make it a preferred choice for a wide range of fastening applications within engine systems.

Conclusion

The Hexagon Flange Head Cap Screw part number 3910901, manufactured by Cummins, is a critical component in the realm of heavy-duty trucks, offering durability, reliability, and ease of installation. Its compatibility with a wide range of Cummins engines and its application across various engine systems underscore its importance in maintaining the performance and efficiency of heavy-duty vehicles.