3643905
Hexagon Head Cap Screw
Cummins®

The Cummins 3643905 Hexagon Head Cap Screw is a specialized fastener designed for use in commercial truck maintenance and operation. This screw plays a significant role in securing various components within the truck’s mechanical assemblies, ensuring the vehicle’s overall functionality and safety. Understanding its purpose and proper usage is vital for maintaining the integrity of commercial trucks.

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 mechanical assemblies to secure components together, providing a strong and reliable connection. The hexagonal shape of the head ensures that the screw can be turned smoothly without slipping, which is crucial for applications requiring precise torque settings ¹.

Purpose and Role in Truck Operation

This Cummins part is specifically designed for use in commercial trucks. It is employed in various assemblies, including engine components, chassis parts, and other critical systems. By securely fastening these components, the screw contributes to the truck’s overall performance and safety. Its role in maintaining the structural integrity of the truck cannot be overstated, as it ensures that all parts remain firmly in place under varying operational conditions ².

Key Features

The 3643905 boasts several key features that enhance its performance and durability. It is typically made from high-strength materials, such as alloy steel, which provides excellent resistance to wear and corrosion. The screw features a specific thread type that ensures a secure fit, and its design may include additional elements like a countersunk head for flush mounting or a coating to protect against environmental factors ³.

Benefits

Using the 3643905 offers several benefits. Its high-strength material composition and precise thread design contribute to improved reliability and durability. The screw is easy to install, requiring standard tools commonly found in any mechanic’s toolkit. Additionally, its design helps prevent loosening over time, reducing the need for frequent re-tightening and maintenance.

Installation and Usage Guidelines

Proper installation of the 3643905 is crucial for ensuring a secure fit. Begin by selecting the appropriate wrench or socket that matches the screw’s hexagonal head. Apply a consistent torque setting as specified by the manufacturer to avoid over-tightening, which can damage the screw or the components being fastened. Ensure that the screw is fully engaged with the threaded hole to maximize its holding power.

Troubleshooting Common Issues

Common issues with Hexagon Head Cap Screws include stripping and corrosion. Stripping can occur if excessive force is applied during installation or removal. To address this, use the correct tools and apply steady, even pressure. Corrosion may be prevented by selecting screws with a protective coating and ensuring that they are installed in clean, dry environments. Regular inspection and maintenance can help identify and resolve these issues promptly.

Maintenance Tips

Regular maintenance of Hexagon Head Cap Screws is essential for prolonging their lifespan and ensuring reliable performance. Inspect screws periodically for signs of wear, corrosion, or loosening. Re-tighten screws as necessary, following the manufacturer’s torque specifications. Keeping the screws and surrounding areas clean and dry will also help prevent corrosion and extend the screws’ service life.

Cummins Overview

Cummins Inc. is a leading manufacturer of diesel engines with a rich history of innovation and quality in the automotive industry. Founded in 1919, Cummins has grown to become a global powerhouse, known for its commitment to producing reliable and efficient engines. The company’s extensive product line includes a variety of components and fasteners, such as the 3643905, which are designed to meet the demanding requirements of commercial truck applications.

Hexagon Head Cap Screw 3643905 in Cummins Engines

The 3643905, manufactured by Cummins, is a critical component in several of their engine models. This screw is integral to the assembly and maintenance of the engines, ensuring structural integrity and proper functioning.

GTA38 G CMEICS G116C

In the GTA38 G CMEICS G116C engine, the 3643905 is used in various applications where secure fastening is required. Its design allows for efficient torque transfer, which is essential for maintaining the alignment and stability of engine components.

K38, K50, KTA38GC CM558, QSK38 CM2150 MCRS, QSK38 CM850 MCRS

For the K38, K50, and KTA38GC CM558 engines, the 3643905 plays a vital role in the assembly of the engine’s internal and external components. Its robust construction ensures that it can withstand the operational stresses and temperatures within these engines.

Similarly, in the QSK38 CM2150 MCRS and QSK38 CM850 MCRS engines, the screw is used in multiple locations to secure various parts. Its hexagon head design facilitates easy and precise tightening, which is crucial for the performance and longevity of these engines.

QSK50 CM2150 K107, QSK50 CM2150 MCRS, QSK50 CM2350 K108

In the QSK50 series engines, including the CM2150 K107, CM2150 MCRS, and CM2350 K108 models, the 3643905 is employed in numerous critical applications. Its use in these engines ensures that components are held firmly in place, contributing to the overall reliability and efficiency of the engine.

Role of Part 3643905 Hexagon Head Cap Screw in Engine Systems

In the intricate assembly of engine systems, the 3643905 serves as a fundamental fastening element. This screw is integral in securing various components, ensuring the structural integrity and operational efficiency of the engine.

Integration with Base Components

The Hexagon Head Cap Screw is commonly used to attach base parts to the engine block. This connection is vital for maintaining the alignment and stability of the base, which in turn supports the overall engine structure. The screw’s design allows for secure fastening, preventing any shifting or misalignment that could lead to performance issues.

Securing the Engine Block and Cylinder

Within the engine block, the Hexagon Head Cap Screw plays a role in fastening components such as the cylinder. This ensures that the cylinder remains firmly in place, which is essential for the precise operation of the engine. The screw’s hexagonal head provides a robust grip, facilitating easy and secure tightening.

Application in Long Block Assembly

In the context of a long block assembly, specifically the Long Block Assy. - 50, the Hexagon Head Cap Screw is used to secure various parts. This includes fastening the main bearings, which are critical for the smooth rotation of the crankshaft. The screw’s reliable fastening capability ensures that these components remain in optimal position, contributing to the engine’s overall performance.

Ensuring Stability of Base and Parts

The screw is also employed in securing the base and other parts within the engine system. This includes attaching the base to the engine block and ensuring that all parts are held in place with the required tension. The consistent and secure fastening provided by the Hexagon Head Cap Screw is essential for the durability and reliability of the engine.

Conclusion

In summary, the 3643905 is a key component in the fastening and stability of various engine parts, contributing to the efficient and reliable operation of the engine system.