4891025
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 4891025, is a component manufactured by Cummins, a well-established name in the commercial truck industry. This screw is integral to the assembly and maintenance of commercial trucks, ensuring secure fastening and reliable performance under demanding conditions.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and a flange beneath the head. The hexagonal head allows for efficient tightening and loosening using a wrench, while the flange provides additional surface area to distribute the load and prevent the screw from sinking into the material. In a truck’s assembly, this screw plays a role in securing various components, ensuring they remain firmly in place despite vibrations and other stresses encountered during operation ¹.

Purpose and Role in Truck Operation

The 4891025 Hexagon Flange Head Cap Screw is designed to play a specific role in the operation and maintenance of commercial trucks. It is used to fasten critical components, ensuring they remain securely attached throughout the vehicle’s operation. This screw helps maintain the structural integrity of the truck, contributing to safe and efficient performance. Its design allows it to withstand significant stress, making it suitable for use in various parts of the truck, from the engine compartment to the chassis ².

Key Features

The 4891025 Hexagon Flange Head Cap Screw boasts several key features that enhance its functionality and reliability. Its hexagonal head design enables easy and precise tightening using standard tools. The flange beneath the head provides additional bearing surface, which helps distribute the load and prevents the screw from embedding into the material. Additionally, the screw is made from high-quality materials, ensuring it can withstand the rigors of commercial truck use, including exposure to varying temperatures and mechanical stress ³.

Benefits

The 4891025 Hexagon Flange Head Cap Screw offers several benefits that make it a preferred choice for commercial truck applications. Its durable construction ensures long-lasting performance, reducing the need for frequent replacements. The flange design enhances resistance to loosening, which is crucial in environments where vibrations are common. Additionally, the hexagonal head allows for straightforward installation and removal, facilitating easier maintenance and repairs.

Installation Process

Proper installation of the 4891025 Hexagon Flange Head Cap Screw is vital to ensure optimal performance and longevity. Begin by selecting the appropriate drill bit to create a pilot hole, which helps guide the screw and prevents it from wandering. Next, use a wrench to tighten the screw until it reaches the desired torque specification, ensuring it is secure without over-tightening, which could damage the screw or the surrounding material. Regularly check the screw to ensure it remains tight and has not loosened due to vibrations or other factors.

Troubleshooting and Maintenance

Identifying common issues with the 4891025 Hexagon Flange Head Cap Screw can help maintain its effectiveness and prolong its lifespan. Common problems include loosening due to vibrations and corrosion from exposure to the elements. To troubleshoot, regularly inspect the screw for signs of wear or damage. If loosening is detected, re-tighten the screw to the specified torque. To prevent corrosion, apply a suitable protective coating or use screws made from corrosion-resistant materials. Routine maintenance, including periodic checks and re-tightening, can help ensure the screw continues to perform reliably.

Compatibility and Applications

The 4891025 Hexagon Flange Head Cap Screw is designed for use in various applications within the commercial trucking industry. It is compatible with a range of truck models, particularly those manufactured or maintained by Cummins. This screw is commonly used in engine compartments, chassis assemblies, and other critical areas where secure fastening is required. Its versatile design makes it suitable for a wide array of fastening tasks, ensuring it can meet the diverse needs of commercial truck operators.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Founded in 1919, Cummins has built a reputation for innovation, quality, and reliability in the commercial truck industry. The company offers a comprehensive range of products and services, including engines, powertrains, and aftermarket parts, designed to meet the demanding requirements of commercial transportation. Cummins’ commitment to excellence and customer satisfaction has made it a trusted name among truck manufacturers and operators worldwide.

Hexagon Flange Head Cap Screw 4891025 in Cummins Engines

The Cummins Hexagon Flange Head Cap Screw part number 4891025 is a critical component in various Cummins engine models. This screw is designed to provide secure fastening in applications where high strength and durability are essential. Here is how it fits into the specified Cummins engines:

ISB CM850 and ISBE4 CM850

The ISB CM850 and ISBE4 CM850 engines both benefit from the use of the 4891025 screw. This part is typically used in applications requiring robust fastening solutions, such as securing engine covers or other critical components.

ISB/ISD4.5 CM2150 B119 and ISB/ISD6.7 CM2150 SN

In the ISB/ISD4.5 CM2150 B119 and ISB/ISD6.7 CM2150 SN engines, the 4891025 screw is employed in several key areas. These engines, known for their power and reliability, use this screw to ensure that various parts are securely fastened, maintaining the integrity of the engine’s structure and performance.

ISBE CM2150 and ISBE CM800

The ISBE CM2150 and ISBE CM800 engines also incorporate the 4891025 screw in their design. This screw is used in critical fastening applications where high torque and durability are necessary to withstand the operational stresses of these engines.

ISF3.8 CM2220 AN

In the ISF3.8 CM2220 AN engine, the 4891025 screw is utilized to secure various components, ensuring that the engine operates efficiently and reliably. This screw’s design allows it to provide the necessary strength and stability in demanding environments.

Each of these engines relies on the 4891025 screw for its specific fastening needs, ensuring that the engine components remain securely attached under various operational conditions.

Role of Part 4891025 Hexagon Flange Head Cap Screw in Engine Systems

The 4891025 Hexagon Flange Head Cap Screw is instrumental in securing and maintaining the integrity of various engine components. Its primary function is to provide a robust fastening solution that ensures components remain firmly in place under the high stresses and vibrations typical of engine operation.

Connecting Rod and Piston Assembly

In the connecting rod and piston assembly, the 4891025 screw is often used to secure the connecting rod to the crankshaft. This connection is vital for transferring the linear motion of the piston into rotational motion of the crankshaft. The flange head of the screw offers additional surface area for distribution of clamping force, reducing the risk of stripping or loosening over time.

Cylinder Head Attachment

When attaching the cylinder head to the engine block, the 4891025 screw plays a significant role. It ensures a tight and even seal across the gasket, which is essential for maintaining compression and preventing leaks. The hexagonal flange head allows for easier torque application, ensuring that the screw is tightened to the manufacturer’s specifications.

Injector Plumbing

In injector plumbing systems, these screws are used to secure fuel injectors in place. Proper fastening is essential to maintain fuel line integrity and ensure that injectors operate within their designed parameters. The flange head provides additional stability, which is particularly important in high-pressure fuel systems where vibrations can be significant.

General Engine Parts

Across various engine parts, the 4891025 screw is utilized for its reliability and ease of use. Whether securing brackets, covers, or other ancillary components, its design ensures a strong and lasting connection. This is particularly important in performance engines where components may be subjected to extreme conditions.

Performance Enhancements

In performance applications, the 4891025 screw is often chosen for its ability to withstand higher torque values without deformation. This makes it suitable for use in aftermarket upgrades where components may be more stressed than in standard applications. The screw’s design helps in maintaining the structural integrity of enhanced engine systems, contributing to overall performance and reliability.

Conclusion

The 4891025 Hexagon Flange Head Cap Screw is a vital component in the commercial trucking industry, offering reliable fastening solutions for various engine and truck components. Its design, featuring a hexagonal head and flange, ensures easy installation, secure fastening, and resistance to loosening under operational stresses. Proper installation and maintenance of this screw are essential to ensure the longevity and performance of commercial trucks and engines. Cummins’ commitment to quality and innovation is reflected in the design and functionality of this part, making it a trusted choice for truck manufacturers and operators worldwide.