3903857
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, specifically part #3903857 manufactured by Cummins, is a vital component in commercial truck applications. This screw is designed to secure various components within the truck’s systems, ensuring both structural integrity and optimal performance. Its robust design and high-quality materials make it a reliable choice for heavy-duty applications ¹.

Basic Concepts

The Hexagon Flange Head Cap Screw is characterized by its hexagonal head and flange features. The hexagonal head allows for efficient torque application using standard tools, ensuring secure fastening. The flange, a flat, circular plate at the head of the screw, distributes the load over a larger area, reducing the risk of the screw pulling through the material. These features contribute to the screw’s performance by providing enhanced stability and resistance to loosening under vibration ².

Purpose and Function

This Cummins part plays a significant role in truck operations by securing critical components. It is commonly used in applications where high tensile strength and resistance to vibration are required. By fastening components securely, it helps maintain the structural integrity and performance of truck systems, ensuring that parts remain in place under various operating conditions ³.

Key Features

The 3903857 Hexagon Flange Head Cap Screw boasts several key features that enhance its durability and performance. It is typically made from high-strength steel, which provides excellent tensile strength and resistance to wear. The screw features a coarse thread type, which allows for quick and secure fastening. Additionally, it may have special coatings or treatments, such as zinc plating, to improve corrosion resistance and extend its service life.

Benefits

The benefits of using the 3903857 Hexagon Flange Head Cap Screw include improved fastening strength, resistance to vibration loosening, and ease of installation and removal. Its design ensures a secure hold on components, reducing the likelihood of failure due to loosening. The hexagonal head allows for straightforward installation and removal using common tools, making it a practical choice for maintenance and repair tasks.

Troubleshooting and Maintenance

Common issues with the 3903857 Hexagon Flange Head Cap Screw may include signs of wear, corrosion, or failure. Regular inspection for these signs can help identify potential problems early. Maintenance tips to ensure longevity and reliable performance include proper torque application during installation, using the correct tools to avoid damage to the hexagonal head, and applying appropriate coatings or treatments to protect against corrosion.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history of innovation and quality, Cummins is committed to providing reliable and efficient solutions for the automotive and engine manufacturing industries. Their product range includes a variety of components designed to meet the demanding requirements of commercial and industrial applications.

Cummins Engine Compatibility with Part 3903857

This Cummins part is a versatile component that fits various Cummins engines. This screw is designed to secure different parts within the engine assembly, ensuring structural integrity and operational efficiency. Below is a detailed breakdown of the engines that are compatible with this part:

4B3.9 and 6B5.9 Engines

The 4B3.9 and 6B5.9 engines are part of the B-series family, known for their robust performance and reliability. The 3903857 screw is used in these engines to fasten various components, including cylinder heads and engine blocks, ensuring that these parts remain securely in place under high-stress conditions.

6C8.3 and B3.9 G Engines

The 6C8.3 and B3.9 G engines also benefit from the use of the 3903857 screw. These engines are typically used in heavy-duty applications, and the screw’s design helps maintain the structural integrity of the engine during operation.

B4.5 and B5.9 Engines

The B4.5 and B5.9 engines are part of the B-series family, which is known for its versatility and durability. The 3903857 screw is used to secure various engine components, ensuring that the engine operates smoothly and efficiently.

B5.9 CM2670 B166C and B5.9 G Engines

The B5.9 CM2670 B166C and B5.9 G engines are high-performance models that require precise fastening to maintain their operational integrity. The 3903857 screw is used in these engines to secure critical components, ensuring that the engine operates at peak efficiency.

B5.9 GAS PLUS CM556 and G5.9 Engines

The B5.9 GAS PLUS CM556 and G5.9 engines are designed for high-performance applications. The 3903857 screw is used to fasten various parts within these engines, ensuring that they can withstand the rigors of heavy-duty use.

G5.9 CM558 and ISB Engines

The G5.9 CM558 and ISB engines are part of the Cummins lineup, known for their reliability and performance. The 3903857 screw is used in these engines to secure various components, ensuring that the engine operates smoothly and efficiently.

ISB CM550, ISB CM850, ISB3.9 CM2220 B107, ISB5.9 CM2880 B127, ISB5.9G CM2180

The ISB series engines, including the ISB CM550, ISB CM850, ISB3.9 CM2220 B107, ISB5.9 CM2880 B127, and ISB5.9G CM2180, are designed for a wide range of applications. The 3903857 screw is used to fasten various parts within these engines, ensuring that they can operate under different conditions.

QSB3.9 and QSB5.9 Engines

The QSB3.9 and QSB5.9 engines are part of the QSB series, known for their versatility and durability. The 3903857 screw is used in these engines to secure various components, ensuring that the engine operates smoothly and efficiently.

QSB3.9 30 CM550, QSB3.9 CM2880 B138, QSB5.9 30 CM550, QSB5.9 44 CM550, QSB5.9 CM2880 B139, QSB5.9 CM850, QSB5.9G

The QSB3.9 and QSB5.9 engines, including the QSB3.9 30 CM550, QSB3.9 CM2880 B138, QSB5.9 30 CM550, QSB5.9 44 CM550, QSB5.9 CM2880 B139, QSB5.9 CM850, and QSB5.9G, are designed for a wide range of applications. The 3903857 screw is used to fasten various parts within these engines, ensuring that they can operate under different conditions.

Role of Part 3903857 Hexagon Flange Head Cap Screw in Engine Systems

This part is integral in securing and maintaining the structural integrity of various engine components. Its design allows for efficient torque transfer and reliable fastening, which is essential in high-stress environments.

Adapter

In engine systems, adapters are often used to connect different components, ensuring compatibility and smooth operation. The Hexagon Flange Head Cap Screw plays a significant role in securing these adapters, preventing any misalignment or disconnection that could lead to operational inefficiencies or damage.

Front Drive

The front drive system is responsible for transmitting power from the engine to the wheels. The Hexagon Flange Head Cap Screw is used to fasten components within the front drive system, ensuring that all parts remain securely in place. This is particularly important in maintaining the alignment and efficiency of the drive system.

Damper

Dampers are designed to reduce vibrations and ensure smooth operation of the engine. The Hexagon Flange Head Cap Screw is employed to secure damper components, ensuring they are firmly attached and can effectively perform their function. This helps in maintaining the overall stability and performance of the engine.

Vibration

Managing vibration is key to the longevity and performance of an engine. The Hexagon Flange Head Cap Screw is used in various points throughout the engine to secure components that are susceptible to vibration. By ensuring these parts are tightly fastened, the screw helps in minimizing unwanted movement and stress on the engine.

Pulley

Pulleys are essential in transmitting power through belts in engine systems. The Hexagon Flange Head Cap Screw is utilized to secure pulleys to their mounts, ensuring they operate smoothly and efficiently. This fastening is vital for the consistent performance of belt-driven systems.

Crankshaft

The crankshaft is a central component in the engine, converting linear piston motion into rotational force. The Hexagon Flange Head Cap Screw is used in various applications around the crankshaft, such as securing sensors, balancers, or other auxiliary components. This ensures that all crankshaft-related parts function harmoniously and contribute to the engine’s overall performance.

Conclusion

The 3903857 Hexagon Flange Head Cap Screw is a critical component in ensuring the structural integrity and performance of Cummins engines. Its robust design, high-quality materials, and versatile applications make it an indispensable part in heavy-duty truck and engine systems. Regular maintenance and proper installation are essential to maximize its benefits and ensure reliable operation.