3863446
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3863446, is a component manufactured by Cummins, a well-established name in the commercial truck industry. This screw is significant in the realm of truck maintenance due to its robust design and reliable performance. Cummins, known for its high-quality components, ensures that this screw meets the demanding requirements of heavy-duty applications ¹.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flange feature. In the automotive industry, these screws are commonly used for their ability to provide a secure and stable connection. Specifically, in heavy-duty trucks, they are employed to fasten various components that require strong and durable attachment points. The flange at the base of the screw head distributes the load more evenly, reducing the risk of damage to the fastened material ².

Purpose and Function

The Hexagon Flange Head Cap Screw plays a role in the operation of a truck by securing critical components and ensuring structural integrity. It is often used in applications where vibrations and dynamic loads are present, such as in the engine compartment, transmission, and chassis. By providing a secure fastening solution, this screw helps maintain the alignment and functionality of various truck parts, contributing to the overall reliability and safety of the vehicle ³.

Key Features

Several distinctive characteristics define the Hexagon Flange Head Cap Screw. The hexagonal head allows for efficient torque application using common hand tools, ensuring that the screw can be tightened to the specified torque without slipping. The flange feature at the base of the head provides additional surface area, which helps in distributing the clamping force more evenly. Additionally, these screws are typically made from high-strength materials, such as alloy steel, to withstand the rigors of heavy-duty use.

Benefits

Using a Hexagon Flange Head Cap Screw offers several advantages. The design of the screw enhances fastening security, making it less likely to loosen over time compared to standard cap screws. The flange feature also contributes to this security by providing a wider contact area. Furthermore, the material composition of these screws ensures durability under heavy-duty conditions, resisting corrosion and maintaining strength even when exposed to harsh environments.

Installation and Usage

Proper installation of the Hexagon Flange Head Cap Screw is vital to ensure its effectiveness. 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. Common tools used for installation include torque wrenches and socket sets. Following the manufacturer’s guidelines for torque values ensures that the screw is installed correctly and functions as intended.

Troubleshooting and Maintenance

Identifying common issues with the Hexagon Flange Head Cap Screw, such as loosening or corrosion, is important for maintaining the truck’s performance. Regular inspections can help detect these problems early. If loosening is detected, re-tightening to the specified torque is usually sufficient. In cases of corrosion, cleaning the affected area and applying a suitable anti-corrosion treatment can help extend the screw’s lifespan. Routine maintenance practices, including checking for proper torque and ensuring that all fasteners are in good condition, contribute to the longevity and performance of the truck.

Cummins: Manufacturer Overview

Cummins Inc. is a globally recognized leader in the design, manufacture, and distribution of engines and related technologies. With a history spanning over a century, Cummins has built a reputation for producing reliable and high-quality components for commercial vehicles. The company’s commitment to innovation and excellence is evident in its wide range of products, which are designed to meet the rigorous demands of heavy-duty applications. Cummins’ dedication to quality ensures that components like the Hexagon Flange Head Cap Screw are engineered to deliver consistent performance and durability.

Hexagon Flange Head Cap Screw 3863446 in Cummins Engines

The Cummins part number 3863446, a Hexagon Flange Head Cap Screw, is a critical component in several Cummins engine models. This screw is designed to secure various parts within the engine, ensuring structural integrity and operational efficiency.

Application in Specific Engines

4B3.9 and QSB6.7 CM850 (CM2850)

In the 4B3.9 and QSB6.7 CM850 (CM2850) engines, the 3863446 screw is used to fasten components that require a robust connection. These engines, known for their reliability and performance, benefit from the precision and strength of this screw in maintaining the alignment and stability of critical engine parts.

QSB7 CM2880 B117

For the QSB7 CM2880 B117 engine, the 3863446 screw plays a vital role in securing various engine components. Its design ensures that the screw can withstand the high stresses and temperatures typical of this engine model, contributing to the overall durability and longevity of the engine.

QST30 CM2350 T101

In the QST30 CM2350 T101 engine, the 3863446 screw is utilized to fasten parts that are subjected to significant mechanical forces. This engine, designed for heavy-duty applications, relies on the precision and reliability of this screw to maintain the integrity of its components under demanding conditions.

Grouping of Engines

The engines mentioned above, while differing in specifications and applications, share a common requirement for high-quality fasteners like the 3863446 screw. This part’s consistent performance across these models underscores its importance in ensuring the engines’ operational efficiency and reliability.

Role of Part 3863446 Hexagon Flange Head Cap Screw in Engine Systems

The Part 3863446 Hexagon Flange Head Cap Screw is an essential fastening component utilized in various engine systems to ensure secure and reliable connections. Its robust design allows it to withstand high stress and vibrations commonly encountered in engine environments.

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 vital for maintaining the structural integrity of the fan, ensuring efficient airflow over the engine to prevent overheating.

Engine Mounting

For engine mounting, these screws play a significant role in securing the engine to its mounting brackets. This connection is important for absorbing vibrations and ensuring the engine remains stable during operation, which contributes to the overall durability and performance of the engine.

Filter Housing

Within the filter housing, particularly for oil and fuel filters, the Hexagon Flange Head Cap Screw is employed to fasten the filter cap to the housing. This secure fit is essential for maintaining the seal, which is necessary for effective filtration and preventing leaks.

Lubricating Oil System

In the lubricating oil system, these screws are used to attach various components such as oil pumps, filters, and coolers. Ensuring these parts are tightly secured helps maintain the integrity of the oil flow, which is essential for reducing friction and wear within the engine.

Engine Control Module (ECM) Mounting

The Hexagon Flange Head Cap Screw is also utilized in mounting the Engine Control Module (ECM). Secure attachment of the ECM is important for protecting the sensitive electronic components from vibrations and ensuring reliable operation.

Fan Drive Mechanism

In the fan drive mechanism, these screws are used to secure the drive components, ensuring that the fan operates smoothly and efficiently in response to engine temperature changes.

Plumbing Connections

For plumbing connections in both fuel supply and drain systems, the Hexagon Flange Head Cap Screw is used to secure fittings and connectors. This ensures a leak-free system, which is vital for maintaining fuel integrity and preventing hazardous spills.

Auxiliary Cooling System

In auxiliary cooling systems, these screws are employed to fasten radiator components, ensuring that the cooling system operates efficiently to manage engine temperature under varying load conditions.

Conclusion

The Hexagon Flange Head Cap Screw, part number 3863446, is a vital component in Cummins engines, ensuring the secure fastening of critical parts across various engine systems. Its robust design and reliable performance contribute to the overall efficiency, durability, and safety of heavy-duty trucks. Proper installation, regular maintenance, and understanding its applications are essential for maximizing the benefits of this Cummins part.