4991526
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 4991526, is a specialized fastener produced by Cummins, a leading manufacturer in the commercial truck industry. This screw is integral to the maintenance and operation of commercial trucks, providing secure fastening solutions that contribute to the overall reliability and performance of truck components.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of bolt characterized by its hexagonal head and a flange beneath the head. The hexagonal head allows for efficient torque application using standard tools, while the flange distributes the load over a larger area, reducing the risk of the screw pulling through the material. Within mechanical systems, these screws are used to fasten components securely, ensuring that parts remain in place under various operational stresses ¹.

Purpose and Role in Truck Operation

This Cummins part plays a significant role in the operation and maintenance of commercial trucks. It is commonly used in applications where high tensile strength and resistance to vibration are required. These screws are often found in engine components, chassis assemblies, and other critical areas where secure fastening is paramount. Their design ensures that components remain firmly attached, even under the dynamic conditions experienced by commercial trucks.

Key Features

The 4991526 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance and durability. Its hexagonal head design allows for easy and precise tightening using standard wrenches or sockets. The flange beneath the head provides additional surface area for load distribution, minimizing the risk of the screw pulling through the material. Additionally, the screw is crafted from high-quality materials that offer excellent resistance to corrosion and wear, ensuring long-lasting performance in demanding environments ².

Benefits

Using this part in truck maintenance offers several advantages. The secure fastening provided by the hexagonal head and flange design ensures that components remain firmly in place, reducing the risk of loosening due to vibration. The high-quality material used in its construction enhances its resistance to corrosion and wear, contributing to a longer service life. Additionally, the design of the screw allows for easy installation and removal, facilitating maintenance procedures.

Installation and Usage Guidelines

To ensure optimal performance and longevity, proper installation of the 4991526 Hexagon Flange Head Cap Screw is crucial. Begin by selecting the appropriate size and grade of screw for the application. Use a torque wrench to tighten the screw to the manufacturer’s specified torque settings, ensuring that it is securely fastened without over-tightening, which could damage the screw or the surrounding material. Regularly inspect the screw for signs of wear or corrosion, and replace it if necessary to maintain secure fastening.

Troubleshooting and Maintenance

Common issues associated with Hexagon Flange Head Cap Screws include loosening due to vibration and corrosion. To troubleshoot these issues, regularly inspect the screws for signs of wear or damage. If a screw appears loose, re-tighten it to the specified torque settings. In cases of corrosion, replace the screw with a new one to ensure continued secure fastening. Implementing a routine maintenance schedule that includes the inspection and tightening of these screws can help extend their lifespan and ensure reliable operation.

Safety Considerations

When working with Hexagon Flange Head Cap Screws, it is important to observe several safety practices to prevent accidents and ensure personal safety. Always use the appropriate tools for installation and removal to avoid damaging the screw or the surrounding material. Wear personal protective equipment, such as gloves and safety glasses, to protect against potential injuries. Additionally, ensure that the work area is clean and free of debris to prevent slips and falls.

Cummins 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 reputation for quality and innovation in the commercial truck industry. The company’s extensive product range includes engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of commercial truck applications. Cummins’ commitment to quality is evident in its rigorous testing and quality control processes, ensuring that its products deliver reliable performance and durability.

Cummins Engine Part 4991526: Hexagon Flange Head Cap Screw

The Cummins part number 4991526, a Hexagon Flange Head Cap Screw, is a critical component in the assembly and maintenance of several Cummins engine models. This screw is designed to provide a secure fastening solution, ensuring that various engine parts remain tightly secured during operation.

Application in Cummins Engines

6B5.9 and 6C8.3 Engines

The 4991526 screw is utilized in the 6B5.9 and 6C8.3 engines, where it plays a pivotal role in maintaining the integrity of the engine’s structure. These engines, known for their reliability and performance, require robust fastening solutions to withstand the demanding conditions they operate under. The screw’s design allows for precise alignment and secure fastening, which is crucial for the longevity and efficiency of these engines.

L9.3 and L105 Engines

Similarly, in the L9.3 and L105 engines, the 4991526 screw is integral to the assembly process. These engines, often used in heavy-duty applications, demand high-strength fasteners to ensure that all components are securely fastened and can endure the rigors of continuous operation. The hexagon flange head design of the screw provides a larger surface area for torque application, enhancing the fastening process.

Importance of the Hexagon Flange Head Cap Screw

The use of the 4991526 screw in these engines underscores its importance in maintaining engine stability and performance. The hexagon flange head design allows for easier and more efficient tightening with tools, reducing the risk of stripping and ensuring a secure fit. This is particularly important in high-stress environments where engine components are subjected to significant forces and vibrations.

By utilizing the 4991526 screw, Cummins ensures that their engines maintain their structural integrity and operational efficiency, providing reliable performance across a range of applications.

Hexagon Flange Head Cap Screw (Part 4991526) Component Usage

The Hexagon Flange Head Cap Screw, identified by part number 4991526, is integral in the assembly and maintenance of various engine components. Its design allows for secure fastening and efficient torque transmission, making it suitable for high-stress applications within engine systems.

Camshaft Assembly

In camshaft assemblies, the Hexagon Flange Head Cap Screw is used to fasten the camshaft to the cylinder head. This ensures precise alignment and reduces the risk of misalignment, which can lead to performance issues. The screw’s flange head provides additional surface area for torque application, enhancing the stability of the camshaft within the engine block.

Cylinder Head Mounting

When mounting the cylinder head to the engine block, these screws play a significant role. They help in achieving the correct clamping force, which is essential for sealing the combustion chamber and preventing leaks. The flange head design also aids in distributing the clamping force evenly across the gasket, improving the seal integrity.

Fuel Injector Securing

For fuel injectors, the Hexagon Flange Head Cap Screw is employed to secure the injector to the cylinder head. This is vital for maintaining the injector’s position and ensuring it operates within specified tolerances. The screw’s robust design helps withstand the high pressures and temperatures associated with fuel injection systems.

Fuel Pump Coupling and Mounting

In fuel pump systems, these screws are used in both the coupling and mounting processes. For the fuel pump coupling, they ensure a secure connection between the pump and the engine, facilitating efficient fuel delivery. In fuel pump mounting, the screws help in attaching the pump to the engine block or frame, providing stability and reducing vibrations that could affect performance.

Injector Attachment

Similar to fuel injectors, direct injectors also require secure fastening to the engine components. The Hexagon Flange Head Cap Screw ensures that injectors remain firmly in place, which is crucial for precise fuel delivery and combustion efficiency. The screw’s design allows for easy torque application, making it ideal for this application.

General Performance Enhancement

Across various engine components, the use of Hexagon Flange Head Cap Screws contributes to overall performance enhancement. By providing a reliable fastening solution, these screws help in maintaining the integrity of engine assemblies, leading to improved efficiency and longevity of the engine parts.

Conclusion

The 4991526 Hexagon Flange Head Cap Screw is a vital component in the maintenance and operation of commercial trucks and Cummins engines. Its design, featuring a hexagonal head and flange, ensures secure fastening and efficient torque transmission, making it suitable for high-stress applications. The use of high-quality materials enhances its resistance to corrosion and wear, contributing to a longer service life. Proper installation, regular maintenance, and adherence to safety practices are essential for optimal performance and longevity of this part.