3422903
Hexagon Head Cap Screw
Cummins®

The Cummins 3422903 Hexagon Head Cap Screw is a specialized fastener designed for use in commercial truck maintenance and operation. This part plays a significant role in ensuring the structural integrity and efficient operation of various truck components. Its design and material composition are tailored to meet the demanding requirements of heavy-duty applications.

Basic Concepts of Hexagon Head Cap Screws

Hexagon Head Cap Screws are characterized by a hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. These screws provide a secure connection between components, distributing load and stress evenly across the threaded area. They are commonly made from materials such as carbon steel, stainless steel, or alloy steel, and feature various threading types, including coarse and fine threads, to accommodate different applications ¹.

Purpose of the 3422903 Hexagon Head Cap Screw in Truck Operation

This Cummins part is integral to the assembly and maintenance of commercial trucks. It is used in applications where secure fastening is required, such as joining engine components, transmission parts, and chassis assemblies. Common applications include securing engine covers, attaching brackets, and fastening structural components.

Key Features

The 3422903 features a hexagonal head design that facilitates easy installation and removal using standard tools. It is typically made from high-strength materials to ensure durability under heavy loads. The screw’s thread specifications are designed to provide a strong, secure connection that resists loosening due to vibration, a common issue in truck operations.

Benefits

Using the 3422903 offers several benefits. Its design enhances fastening security, ensuring components remain firmly attached under operational stress. The screw’s resistance to vibration loosening helps maintain the integrity of connections over time. Additionally, the hexagonal head allows for straightforward installation and removal, reducing maintenance time and effort.

Installation Guidelines

Proper installation of the 3422903 involves several steps. Begin by ensuring the mating surfaces are clean and free of debris. Use a wrench or socket to tighten the screw to the specified torque, which ensures a secure connection without over-tightening. Recommended tools include a torque wrench for precise application of torque and a suitable wrench or socket for the hexagonal head.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws include loosening due to vibration and corrosion. To address these, periodic inspections should be conducted to check for signs of wear or corrosion. Re-torquing screws at recommended intervals can help maintain secure connections. If corrosion is detected, cleaning the affected area and applying a suitable anti-corrosive treatment can prolong the screw’s lifespan ².

Cummins: Manufacturer Overview

Cummins Inc. is a leading manufacturer in the commercial truck industry, known for its commitment to quality and innovation. With a diverse product range that includes engines, powertrains, and aftermarket parts, Cummins has established a reputation for reliability and performance. The company’s focus on advanced manufacturing techniques and rigorous quality control ensures that its components, like the 3422903, meet the high standards required for heavy-duty applications.

Hexagon Head Cap Screw 3422903 in Cummins Engines

The Cummins 3422903 is a critical component in several Cummins engine models. This screw is integral to the assembly and maintenance of the engines, ensuring secure fastening of various parts.

QSV81G, QSV91G, QSW/QSV82, QSW27, QSW36, and QSW73

In the QSV81G, QSV91G, QSW/QSV82, QSW27, QSW36, and QSW73 engines, the 3422903 is used in multiple applications. These engines, known for their reliability and performance, require robust fastening solutions to maintain structural integrity and operational efficiency. The screw’s design, featuring a hexagonal head, allows for easy and precise tightening with standard tools, ensuring that the components remain securely fastened under operational stresses.

QSV91-G4 CM558/CM700 V102

For the QSV91-G4 CM558/CM700 V102 engine, the 3422903 plays a crucial role in the engine’s assembly. This engine variant, designed for high-performance applications, necessitates the use of high-quality fasteners to withstand the rigors of demanding environments. The screw’s material and construction are specifically chosen to provide durability and resistance to fatigue, ensuring long-term reliability and performance.

The use of the 3422903 across these engines highlights its versatility and importance in maintaining the structural and operational integrity of Cummins engines. Its consistent application across different engine models underscores the importance of standardized, high-quality components in engine assembly and maintenance.

Role of Part 3422903 Hexagon Head Cap Screw in Engine Systems

Part 3422903 is integral to the secure assembly and operation of various engine components. It is used extensively in the air intake assembly connection to ensure a tight and reliable seal, which is essential for optimal airflow into the engine. In the arrangement of components, this screw helps maintain the structural integrity and alignment of parts, ensuring efficient operation.

Within the turbocharger system, Part 3422903 is employed to secure the turbocharger arrangement, contributing to the stable mounting of the turbocharger. This is vital for the turbocharger’s performance and durability. Similarly, in the charge air assembly cooler, it plays a role in securing the cooler to its mounting points, ensuring that the charge air is effectively cooled before entering the combustion chamber ³.

The exhaust assembly also benefits from the use of this screw. It is utilized in the exhaust assembly manifold and the exhaust manifold to secure manifold components, ensuring that exhaust gases are efficiently directed away from the engine. Additionally, in the exhaust manifold manifold and the general manifold connections, Part 3422903 helps in maintaining the integrity of the exhaust path, preventing leaks and ensuring smooth operation.

In the multiduct assembly connection and multiduct connection, this screw is essential for securing ductwork, which is critical for the proper routing of air and gases within the engine system. Furthermore, in the turbocharger L6 assembly and turbocharger L8 assembly, it ensures that all components are firmly attached, supporting the turbocharger’s function in boosting engine performance.

Overall, Part 3422903 Hexagon Head Cap Screw is a fundamental component in the secure and efficient operation of various engine systems, contributing to the reliability and performance of the engine as a whole.

Conclusion

The Cummins 3422903 Hexagon Head Cap Screw is a vital component in the maintenance and operation of commercial trucks and Cummins engines. Its design, material composition, and application across various engine systems highlight its importance in ensuring structural integrity, efficient operation, and long-term reliability. Proper installation, maintenance, and understanding of its role in engine systems are crucial for maximizing the performance and lifespan of this essential fastener.