3901857
Hexagon Head Cap Screw
Cummins®

The Cummins part number 3901857, a Hexagon Head Cap Screw, is a specialized fastener designed for use in commercial trucks. Cummins, a well-established name in the automotive industry, is renowned for its high-quality components that enhance the performance and reliability of commercial vehicles. This screw is integral to the assembly and maintenance of various truck components, ensuring secure and durable fastening solutions.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of fastener characterized by its hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. These screws are commonly used in applications requiring strong, permanent fastening. Mechanically, the hexagonal head provides a stable interface for tools, reducing the risk of cam-out and ensuring consistent torque application. The threaded shaft of the screw engages with the internal threads of a nut or directly into a tapped hole, creating a secure connection ¹.

Role of the 3901857 Hexagon Head Cap Screw in Truck Operation

This Cummins part plays a significant role in the operation and maintenance of commercial trucks. It is utilized in various applications, including securing engine components, attaching body panels, and fastening chassis parts. Its robust design ensures that critical components remain securely in place, contributing to the overall stability and performance of the truck. Proper use of this screw helps maintain the integrity of truck assemblies, reducing the likelihood of mechanical failures ².

Key Features of the 3901857 Hexagon Head Cap Screw

The 3901857 boasts several key features that enhance its functionality and durability. It is typically made from high-strength steel, providing excellent resistance to wear and corrosion. The screw features a fine or coarse thread, depending on the specific application, allowing it to grip firmly in various materials. The hexagonal head is designed for easy engagement with standard tools, ensuring efficient installation and removal. Additionally, the screw may include a countersunk head for flush mounting or a flat head for standard applications, depending on the required fit.

Benefits of Using the 3901857 Hexagon Head Cap Screw

Using this Cummins part offers several benefits. Its high-strength material composition ensures enhanced durability, making it suitable for demanding commercial truck applications. The reliable fastening provided by the screw helps maintain the structural integrity of truck components. Additionally, the hexagonal head design allows for easy use with common tools, facilitating quick and efficient installation and maintenance procedures.

Installation and Usage Guidelines

Proper installation of the 3901857 is crucial for ensuring secure fastening. Begin by selecting the appropriate size and thread type for the application. Use a tap to create a threaded hole if necessary, ensuring it is clean and free of debris. Insert the screw and tighten it using a wrench or socket, applying the recommended torque specification to avoid over-tightening or under-tightening. It is important to follow manufacturer guidelines for torque values to ensure optimal performance and longevity of the fastener.

Troubleshooting Common Issues

Common issues with Hexagon Head Cap Screws include loosening due to vibration or thermal expansion and corrosion in harsh environments. To address loosening, ensure the screw is properly torqued during installation and consider using lock washers or thread lockers for added security. For corrosion, regular inspections and cleaning can help prevent buildup. If corrosion is detected, the affected screw should be replaced to maintain the integrity of the fastening.

Maintenance Tips

To prolong the lifespan of the 3901857, regular maintenance is recommended. Inspect screws periodically for signs of wear, corrosion, or loosening. Clean the screws and surrounding areas to remove dirt and debris that could contribute to corrosion. Re-tighten screws as needed, following the recommended torque specifications, to ensure they remain secure. Additionally, protect screws from environmental factors by applying a corrosion-resistant coating if operating in harsh conditions.

Cummins: A Brief 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 for quality, reliability, and innovation in the commercial truck industry. The company’s extensive product range includes engines, powertrains, and aftermarket parts, all designed to meet the rigorous demands of commercial applications. Cummins is committed to advancing technology and providing solutions that enhance the performance and efficiency of commercial vehicles.

Hexagon Head Cap Screw 3901857 Compatibility with Cummins Engines

This Cummins part is designed to fit a variety of Cummins engines, ensuring compatibility across multiple engine models. This screw is integral in securing various components within the engine assembly, providing the necessary strength and stability required for optimal engine performance.

4B3.9 and 6B5.9 Engines

The 4B3.9 and 6B5.9 engines are part of the B Series family, known for their robust design and reliability. The 3901857 is used in these engines to secure critical components, ensuring that the engine operates smoothly and efficiently.

6C8.3 and C8.3 G Engines

The 6C8.3 and C8.3 G engines are part of the C Series family, which is recognized for its versatility and power. The screw is utilized in these engines to maintain the integrity of the engine assembly, particularly in areas that require high strength and durability.

B5.9 G and B5.9 GAS PLUS CM556 Engines

Both the B5.9 G and B5.9 GAS PLUS CM556 engines benefit from the use of the 3901857. This screw is essential in securing various parts within these engines, contributing to the overall reliability and performance of the engine.

C GAS PLUS CM556 and ISBE CM800 Engines

The C GAS PLUS CM556 and ISBE CM800 engines are part of the Cummins lineup that emphasizes efficiency and power. The screw is used in these engines to ensure that all components are securely fastened, which is crucial for maintaining engine integrity and performance.

G8.3 and ISB CM550 Engines

The G8.3 and ISB CM550 engines are known for their durability and strength. The 3901857 plays a vital role in these engines by securing components that are subjected to high stress and load, ensuring the engine operates reliably.

ISB5.9G CM2180 and L10 Engines

The ISB5.9G CM2180 and L10 engines, which include both CELECT and MECHANICAL variants, are designed for high performance and efficiency. The screw is used in these engines to secure various parts, contributing to the overall robustness and reliability of the engine.

By ensuring that the 3901857 is compatible with these engines, Cummins guarantees that the screw will perform reliably in a variety of engine configurations, enhancing the overall performance and longevity of the engine.

Role of Part 3901857 Hexagon Head Cap Screw in Engine Systems

The part 3901857 is integral to the assembly and maintenance of various engine components. It is utilized in securing the Air Cleaner Bracket to the engine, ensuring that the Air Intake Plumbing remains firmly in place, which is essential for the efficient operation of the engine’s air intake system.

In the context of the Arrangement and Lifting components, this screw plays a role in maintaining the structural integrity during engine Lifting procedures, securing brackets and other components to prevent movement or dislodgement.

For the Cylinder Block, the 3901857 screw is often used to fasten components such as the Fan Bracket and the Flywheel Top Level Assembly Housing. This ensures that the Fan and Flywheel operate smoothly and are properly aligned with the cylinder block.

In the Engine Cooling System, the screw is employed in the Radiator Support and the Front Engine System. It helps in securing the Water Inlet Connection and the Oil Level Gauge Housing, contributing to the stability and efficiency of the cooling system.

Additionally, the screw is used in the Injector Plumbing and Plumbing Kit components, ensuring that the Injector connections are secure, which is vital for the precise delivery of fuel to the engine.

Overall, the 3901857 Hexagon Head Cap Screw is a versatile fastener that contributes to the secure assembly and reliable operation of various engine components.

Conclusion

The 3901857 Hexagon Head Cap Screw is a critical component in the assembly and maintenance of commercial truck engines. Its robust design, compatibility with various Cummins engines, and versatile applications make it an essential fastener for ensuring the reliability and performance of truck components. Proper installation, maintenance, and troubleshooting are key to maximizing the lifespan and effectiveness of this screw in demanding commercial applications.