3908226
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by Part #3908226, is a specialized fastener produced by Cummins. This screw is significant in heavy-duty truck applications due to its robust design and reliable performance. Cummins, a renowned manufacturer in the automotive industry, ensures that this component meets the stringent demands of heavy-duty truck operations ³.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of bolt characterized by its hexagonal head and a flange beneath the head. The hexagonal head allows for efficient torque application using standard tools, ensuring secure fastening. The flange serves multiple purposes: it acts as a washer to distribute load and prevent the screw from sinking into the material, and it also provides additional surface area for torque application, enhancing the screw’s stability ¹.

Role in Truck Operation

This Cummins part plays a vital role in the operation of heavy-duty trucks. It is utilized in various truck components and systems where secure and durable fastening is required. Common applications include engine mounts, chassis components, and body panels. The screw’s design ensures that it can withstand significant stress and vibration, maintaining a secure connection in these critical areas ².

Key Features

The 3908226 is crafted from high-strength materials, typically alloy steel, to ensure durability and resistance to wear. It features a coarse thread type, which provides excellent holding power and ease of installation. Additionally, the screw may undergo special coatings or treatments, such as zinc plating, to enhance corrosion resistance and prolong its service life. These features collectively contribute to the screw’s performance and reliability in demanding truck applications ³.

Benefits

Using this Cummins part in truck applications offers several benefits. The screw’s design enhances fastening security, reducing the risk of loosening under vibration. Its robust material composition and potential coatings provide resistance to corrosion, ensuring longevity even in harsh operating conditions. Furthermore, the flange feature aids in distributing loads evenly, preventing damage to the fastened materials ¹.

Troubleshooting and Maintenance

Common issues with the 3908226 may include loosening due to vibration or corrosion over time. To troubleshoot these issues, regular inspections should be conducted to ensure the screws remain tight and free of corrosion. Maintenance tips include applying a thread locker to prevent loosening and using corrosion-resistant coatings or treatments to protect the screws from environmental factors. Proper torque settings during installation also contribute to the screw’s longevity and performance ².

About Cummins

Cummins is a leading manufacturer with a rich history of producing high-quality automotive components. The company is known for its commitment to innovation, reliability, and customer satisfaction. Cummins’ extensive experience and dedication to excellence ensure that their products, including the 3908226, meet the highest standards of quality and performance in the automotive industry ³.

Compatibility with Cummins Engines

This part is designed to fit a variety of Cummins engines, ensuring secure fastening in multiple applications. This part is engineered to provide robust performance and durability, making it suitable for use in demanding environments.

Compatible Engines

• 4B3.9, 6B5.9, 6C8.3, B3.3, B3.9 G, B4.5, B4.5 RGT, B5.6 CM2670 B152B, B5.9 G, B5.9 GAS PLUS CM556, B6.7S, C GAS PLUS CM556, C8.3 G, G5.9, G5.9 CM558, G8.3
• ISB CM2150, ISB CM550, ISB CM850, ISB4.5 CM2350 B104, ISB5.9 CM2880 B110, ISB5.9 CM2880 B140, ISB5.9 CM2880 B149, ISB5.9G CM2180, ISB6.7 CM2250

These engines, which include a range of smaller to mid-sized models, benefit from the precise fit and secure fastening provided by the 3908226 screw. The screw’s design ensures it can withstand the operational stresses and vibrations typical in these engines, maintaining the integrity of the assembly ³.

Role in Engine Systems

This part is integral to the secure assembly and operation of various engine components. Its robust design ensures reliable fastening in high-stress environments, contributing to the overall efficiency and durability of the engine system.

Applications

• Alternator Mounting: Provides a stable connection between the alternator and the engine block.
• Belt Tensioner: Maintains the correct tension on the drive belts.
• Crankcase and Breather Kit: Secures ventilation components.
• Connection and Water Inlet: Ensures a leak-free seal.
• Cooler and Marine Gear Oil: Fastens components that regulate oil temperature.
• Coupling and Fuel Pump: Ensures a secure and vibration-resistant connection.
• Cover and Cam Follower: Maintains the precise alignment of camshafts and valve trains.
• Drive and Water Pump: Ensures the pump remains firmly attached to the engine.
• Heat Exchanger: Fastens components that facilitate efficient heat transfer.
• Fan and Engine: Secures the fan to the engine.
• Filter and Lubricating Oil: Ensures that filters are securely mounted.
• Gauge and Oil Level: Ensures that the gauge is accurately mounted.
• Harness and Electronic Control Module Wiring: Secures wiring connections.
• Ignition Control: Secures components that manage the ignition timing.
• Manifold and Exhaust: Secures the manifold to the engine.
• Engine Control and Fuel Control Modules: Ensures that these critical components are securely mounted.
• Mounting Applications: Provides a reliable fastening solution across various applications.
• Oil Cooler and Pressure Regulator Valve: Ensures that these components are securely mounted.

Conclusion

The 3908226 Hexagon Flange Head Cap Screw is a critical component in the operation and maintenance of heavy-duty trucks and Cummins engines. Its robust design, compatibility with a wide range of engines, and versatile applications make it an essential part for ensuring the secure and reliable performance of engine systems. Regular maintenance and proper installation are key to maximizing the longevity and effectiveness of this Cummins part.