4973899
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 4973899, is a component manufactured by Cummins, a well-established name in the automotive and heavy-duty truck industry. This screw is integral to the assembly and maintenance of commercial trucks, ensuring secure fastening and reliable performance in various applications.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flanged base. The hexagonal head allows for efficient tightening and loosening using a wrench or socket, while the flange provides additional surface area for load distribution and prevents the screw from being driven too far into the material. Within a truck’s mechanical system, these screws are used to secure components, ensuring structural integrity and proper function ¹.

Purpose and Role in Truck Operation

This Cummins part plays a significant role in the operation of a truck by securing critical components and assemblies. It is commonly used in applications where high tensile strength and resistance to loosening are required. This includes fastening engine components, transmission parts, and chassis elements. The screw’s design ensures that it can withstand the dynamic loads and vibrations experienced in heavy-duty truck operations.

Key Features

The 4973899 boasts several key features that enhance its functionality and durability. Its hexagonal head design allows for precise and efficient torque application, reducing the risk of cam-out during installation. The flange at the base of the screw provides additional bearing surface, which helps in distributing the load more evenly and preventing the screw from sinking into the material. Additionally, the screw is typically made from high-strength materials, such as alloy steel, which offers excellent resistance to corrosion and wear.

Benefits

This part offers several benefits that make it a preferred choice for heavy-duty applications. Enhanced fastening security is achieved through its design, which resists loosening under vibration and dynamic loads. The flange also improves load distribution, reducing the stress on the fastened material. Furthermore, the high-strength material used in its construction ensures durability and longevity, even in demanding environments.

Installation and Usage

Proper installation of this part is vital for ensuring optimal performance. It is recommended to use the appropriate torque specifications provided by the manufacturer to achieve the correct clamping force without over-tightening, which could lead to damage. Best practices include cleaning the mating surfaces before installation to prevent corrosion and ensuring that the screw is aligned properly with the hole to avoid cross-threading.

Troubleshooting and Maintenance

Common issues with this part may include loosening due to vibration or corrosion. Regular inspection and maintenance can help identify and address these issues promptly. If loosening is detected, re-tightening to the specified torque is recommended. In cases of corrosion, cleaning the affected area and applying a suitable anti-seize compound can help prevent further issues. Routine checks during maintenance intervals will help ensure the screw remains in good condition.

Cummins Overview

Cummins is a renowned manufacturer with a long-standing reputation in the automotive and heavy-duty truck industry. The company is known for its commitment to producing high-quality components that meet the rigorous demands of commercial applications. With a history of innovation and excellence, Cummins continues to be a trusted name among professionals in the field, providing reliable and durable parts like the 4973899 ².

Hexagon Flange Head Cap Screw (Part 4973899) in Cummins Engines

The Hexagon Flange Head Cap Screw, identified by part number 4973899, is a critical component in several Cummins engine models. This screw is integral to the assembly and maintenance of these engines, ensuring secure fastening and structural integrity.

ISM CM570 and ISM11 CM876 SN

In the ISM CM570 and ISM11 CM876 SN engines, the 4973899 screw is utilized in various applications where a robust and reliable fastening solution is required. These engines are known for their durability and performance, and the use of this specific screw helps maintain the high standards of assembly and operation.

QSM11 CM570

Similarly, in the QSM11 CM570 engine, the 4973899 screw plays a crucial role in securing components together. This engine, like its counterparts, benefits from the precision and strength provided by this part, ensuring that all parts are held firmly in place during operation.

The use of the 4973899 screw across these engine models underscores its importance in maintaining the structural integrity and operational efficiency of Cummins engines. This screw is designed to withstand the rigors of engine operation, providing a reliable fastening solution that is essential for the performance and longevity of the engines.

Role of Part 4973899 Hexagon Flange Head Cap Screw in Engine Systems

The part 4973899 is integral to the assembly and operation of various engine components. Its primary function is to provide secure fastening, ensuring that components remain firmly in place under the dynamic conditions of engine operation.

Fan Assembly

In the fan assembly, the Hexagon Flange Head Cap Screw is used to attach the fan blades to the fan hub. This secure attachment is essential for maintaining the alignment and balance of the fan, which directly impacts the efficiency of air circulation within the engine compartment. Proper fastening prevents vibrations and ensures that the fan operates smoothly, contributing to optimal engine cooling.

Engine Mounting

When it comes to engine mounting, the Hexagon Flange Head Cap Screw plays a significant role in securing the engine to its mounts. This is vital for maintaining the structural integrity of the engine within the vehicle. The screw helps distribute the engine’s weight evenly and absorbs vibrations, which are common during operation. This not only enhances the durability of the engine but also contributes to a quieter and more stable ride.

Spacer Application

In applications involving spacers, the Hexagon Flange Head Cap Screw is used to maintain precise distances between components. Spacers are often employed to ensure that parts are aligned correctly and to prevent interference. The screw’s flange head provides additional surface area for torque application, allowing for tighter and more secure fastening. This is particularly important in high-stress areas where even minor misalignments can lead to significant issues.

Fan Pilot Integration

The fan pilot, which guides the fan’s movement, relies on the Hexagon Flange Head Cap Screw for secure attachment to the engine block or housing. This ensures that the fan pilot remains stationary and accurately aligned with the fan hub. The screw’s design allows for easy installation and removal, facilitating maintenance and repairs. Its flange head also prevents the screw from digging into the material, reducing the risk of damage to the fan pilot or surrounding components.

Conclusion

Overall, the Hexagon Flange Head Cap Screw is a versatile fastener that enhances the reliability and performance of engine systems by ensuring that critical components are securely and precisely attached. Its design and material properties make it well-suited for the demanding conditions of heavy-duty truck and engine applications.