3035921
Hexagon Head Cap Screw
Cummins®

Introduction

The Cummins Part #3035921 Hexagon Head Cap Screw is a specialized fastener designed for use in heavy-duty truck applications. This screw is integral to ensuring secure and reliable fastening in various truck components, contributing to the overall durability and performance of the vehicle.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of bolt characterized by its hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. The design of the cap screw provides a robust and secure fastening solution, commonly used in mechanical assemblies where high strength and resistance to loosening are required. The threads of the screw engage with the internal threads of a nut or directly into a tapped hole, creating a strong joint ¹.

Purpose and Role in Truck Operation

This Cummins part serves a specific purpose in truck applications by securing critical components and assemblies. It plays a role in maintaining the structural integrity of the truck, ensuring that parts remain firmly attached under various operating conditions. This screw is often used in areas where vibrations and dynamic loads are present, making its reliable performance vital for the safe and efficient operation of heavy-duty trucks ².

Key Features

The Cummins Part #3035921 features several key attributes that enhance its performance and durability. It is typically made from high-strength materials, such as alloy steel, to withstand the rigors of heavy-duty applications. The screw has a fine or coarse thread, depending on the specific application, and its hexagonal head design allows for easy and precise tightening. Additionally, the screw may include features such as a rolled thread for increased strength or a corrosion-resistant coating to extend its service life in harsh environments ³.

Benefits

Using the Cummins Part #3035921 Hexagon Head Cap Screw offers several advantages. Its high-strength material composition provides improved fastening strength, ensuring that components remain securely attached. The design of the screw resists loosening, even under vibrations and dynamic loads, which is crucial for maintaining the integrity of truck assemblies. Furthermore, the screw’s durability and resistance to corrosion contribute to its longevity, reducing the need for frequent replacements and maintenance ⁴.

Installation Guidelines

Proper installation of this Cummins part is crucial for achieving secure and effective fastening. The following guidelines should be observed:

1. Ensure the mating surface is clean and free of debris.
2. Use the appropriate wrench or socket to tighten the screw to the specified torque settings. Over-tightening or under-tightening can compromise the joint’s integrity.
3. Consider using a thread locker or anti-seize compound, as recommended, to enhance the screw’s performance and prevent loosening.
4. Inspect the screw and surrounding components periodically to ensure continued secure fastening.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws include loosening, corrosion, and damage from over-tightening. To troubleshoot these problems:

1. Check for signs of corrosion and clean the screw and mating surfaces as needed.
2. Re-tighten the screw to the specified torque if loosening is detected.
3. Replace the screw if it shows signs of damage or excessive wear. Regular maintenance practices, such as periodic inspection and re-torquing, can help prolong the life of the screw and ensure reliable performance.

Manufacturer Information - Cummins

Cummins Inc. is a renowned manufacturer in the automotive and heavy-duty truck industry, known for its commitment to quality and innovation. With a rich history of producing reliable and high-performance components, Cummins has established a strong reputation for excellence. The company’s dedication to advancing technology and maintaining stringent quality control processes ensures that its products, including the Cummins Part #3035921 Hexagon Head Cap Screw, meet the demanding requirements of heavy-duty applications.

Hexagon Head Cap Screw (Part 3035921) in Cummins Engines

The Hexagon Head Cap Screw (part number 3035921) manufactured by Cummins is a critical component in various engine configurations, including the N14 Celect Plus and QSM11 CM570. This screw is integral in ensuring the structural integrity and operational efficiency of these engines.

N14 Celect Plus

In the N14 Celect Plus engine, the Hexagon Head Cap Screw is used in multiple applications where secure fastening is essential. This includes securing various engine components, ensuring that parts remain tightly fastened under operational stresses. The screw’s design allows for easy installation and removal, which is crucial during maintenance and repair processes.

QSM11 CM570

Similarly, in the QSM11 CM570 engine, the Hexagon Head Cap Screw plays a vital role in maintaining the engine’s structural integrity. This engine, known for its robust performance, relies on the precise fit and durability of the screw to hold together critical components. The screw’s hexagonal head provides a larger surface area for tools, facilitating easier and more efficient tightening and loosening.

Common Applications

Both engines utilize the Hexagon Head Cap Screw in areas where high strength and reliability are paramount. These include:

• Cylinder Head Bolts: Ensuring the cylinder heads are securely fastened to the engine block.
• Mounting Brackets: Securing various engine mounts and brackets to the engine block or frame.
• Accessory Drives: Holding components of the accessory drive system in place.

The use of the Hexagon Head Cap Screw in these applications underscores its importance in maintaining the overall performance and longevity of the engines.

Role of Part 3035921 Hexagon Head Cap Screw in Engine Systems

The part 3035921 Hexagon Head Cap Screw is integral to the assembly and operation of various engine components. Its primary function is to secure and maintain the integrity of connections within the engine system.

In the adapter component, this screw ensures a tight and reliable connection between different sections, preventing leaks and ensuring efficient fluid or air transfer.

For the rear drive system, the screw plays a significant role in attaching the drive mechanism to the engine frame, ensuring stability and proper alignment during operation.

In the compressor unit, the screw is used to fasten critical components such as the compressor housing to the engine block. This secure attachment is essential for maintaining the compressor’s efficiency and durability.

Within the air system, particularly in the air compressor, the screw is employed to connect various parts of the compressor, ensuring that it operates smoothly without any component misalignment.

In the gear drive system, the screw is utilized to secure gear components, ensuring they remain in place and function correctly under the stress of engine operation.

For mounting purposes, the screw is often used to attach engine components to the chassis or other structural elements, providing the necessary support and stability.

Overall, the part 3035921 Hexagon Head Cap Screw is a fundamental component in ensuring the secure and efficient operation of various engine systems.

Conclusion

The Cummins Part #3035921 Hexagon Head Cap Screw is a vital component in heavy-duty truck and engine applications. Its robust design, high-strength material, and reliable performance make it essential for maintaining the structural integrity and operational efficiency of various engine systems. Proper installation, regular maintenance, and understanding its role in different engine components are crucial for ensuring the longevity and reliability of this Cummins part.