3863731
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3863731, is a component manufactured by Cummins, a well-established name in the commercial truck industry. This screw is significant in the maintenance and assembly of heavy-duty trucks, providing a reliable fastening solution that meets the rigorous demands of commercial vehicle operations ¹.

Basic Concepts of Hexagon Flange Head Cap Screws

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 torque application using a wrench or socket, while the flange distributes the load over a larger area, reducing the risk of the screw pulling through the material ². In the automotive industry, flange head screws are commonly used for their ability to provide a secure and stable fastening solution, particularly in applications where vibration and dynamic loads are present.

Role and Function in Truck Operation

This Cummins part plays a role in the assembly and maintenance of truck components by providing a secure fastening mechanism. It is used in various applications across the truck, from attaching body panels to securing engine components. Its design ensures that it can withstand the stresses and vibrations inherent in truck operation, contributing to the overall integrity and safety of the vehicle ³.

Key Features

The 3863731 features a hexagonal head that facilitates easy and precise torque application. The flange beneath the head enhances the screw’s ability to resist loosening under dynamic conditions. Additionally, the screw is made from materials that offer high tensile strength and corrosion resistance, making it suitable for the demanding environments typical of heavy-duty truck applications.

Benefits of Using Hexagon Flange Head Cap Screws

Hexagon Flange Head Cap Screws offer several advantages in truck maintenance and assembly. They allow for improved torque application, ensuring that components are securely fastened. The flange design provides resistance to loosening, which is particularly beneficial in applications subject to vibration. Furthermore, their durability in harsh environments makes them a reliable choice for commercial truck usage ⁴.

Installation and Usage Guidelines

To ensure optimal performance and longevity, the 3863731 should be installed using the correct torque specifications. This involves using the appropriate tools, such as a torque wrench, to apply the recommended torque. Proper installation techniques help prevent over-tightening, which can lead to damage, and under-tightening, which can result in loosening.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws may include loosening over time or corrosion in exposed applications. Regular inspection and maintenance can help identify these issues early. To prolong the life of the screw, it is important to ensure that it is correctly installed and that any signs of wear or corrosion are addressed promptly.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emissions technologies. With a strong reputation in the commercial truck industry, Cummins is known for its commitment to quality and innovation. The company’s extensive product range and focus on customer satisfaction underscore its position as a trusted manufacturer of truck components.

Hexagon Flange Head Cap Screw 3863731 in Cummins Engines

The Cummins part number 3863731, a Hexagon Flange Head Cap Screw, is a critical component in various Cummins engines. This part is integral to the assembly and maintenance of these engines, ensuring secure fastening and structural integrity.

6B5.9 Engine

In the 6B5.9 engine, the 3863731 screw is used in several key areas, including securing engine covers and housings. Its design allows for reliable fastening, which is crucial for maintaining the engine’s operational efficiency and safety.

B3.3 Engines

The B3.3 engine series, including both the B3.3 CM2150 and B3.3 CM2250 EC variants, utilizes the 3863731 screw extensively. This screw is employed in fastening various components, ensuring that parts such as engine covers and brackets remain securely in place. The precision and durability of this screw are essential for the engine’s performance and longevity.

QSB6.7 CM850 (CM2850) Engine

In the QSB6.7 CM850 (CM2850) engine, the 3863731 screw plays a vital role in securing several critical components. Its use in this engine ensures that parts such as engine covers and structural brackets are fastened securely, contributing to the engine’s overall reliability and efficiency.

Role of Part 3863731 Hexagon Flange Head Cap Screw in Various Engine Systems

The part 3863731 Hexagon Flange Head Cap Screw is integral to the assembly and functionality of several components within engine systems. Its design and strength make it suitable for securing various parts, ensuring they remain firmly in place under operational stress.

Air Compressor Upfit Kit

In the air compressor upfit kit, the Hexagon Flange Head Cap Screw is used to secure the compressor to its mounting bracket. This ensures that the compressor remains stable during operation, which is essential for consistent air delivery and overall system reliability.

Motor and Starting Systems

For motors and starting systems, this screw plays a significant role in attaching the starting motor to the engine block. It helps in maintaining the alignment and integrity of the starting mechanism, which is vital for the engine’s startup process.

Mounting Applications

Across various mounting applications—whether it’s the air compressor, engine control module (ECM), or the starting motor—the Hexagon Flange Head Cap Screw is employed to fasten these components to their respective brackets or frames. This secure attachment is necessary to prevent vibrations and ensure that the components function correctly within the engine system.

Plumbing and Fuel Systems

In plumbing and fuel systems, the screw is used to secure fittings and connections. Its flange head provides additional surface area for torque application, ensuring that connections remain leak-free and secure, which is important for the safe and efficient operation of the engine.

Shroud and Engine Cooling Fan

For the shroud and engine cooling fan, the Hexagon Flange Head Cap Screw is utilized to attach the shroud to the fan assembly. This attachment is crucial for directing airflow effectively over the engine components, aiding in temperature regulation and overall engine performance.

Starter and Starting Motor

In the starter and starting motor assemblies, the screw is instrumental in securing the starter to the engine block. This ensures that the starter operates efficiently and reliably, contributing to the engine’s ability to start under various conditions.

The consistent use of the Hexagon Flange Head Cap Screw across these components underscores its versatility and importance in maintaining the structural integrity and operational efficiency of engine systems.

Conclusion

The 3863731 Hexagon Flange Head Cap Screw is a vital component in the maintenance and assembly of heavy-duty trucks and Cummins engines. Its design, featuring a hexagonal head and flange, ensures secure fastening and resistance to loosening under dynamic conditions. The screw’s high tensile strength and corrosion resistance make it suitable for the demanding environments of commercial truck applications. Proper installation and maintenance are crucial for ensuring the longevity and reliability of this component, contributing to the overall integrity and safety of the vehicle.