3866613
Hexagon Head Cap Screw
Cummins®

Introduction

The Cummins 3866613 Hexagon Head Cap Screw is a specialized fastener designed for use in commercial truck maintenance and operation. This part plays a significant role in ensuring the secure assembly of various components within a truck’s mechanical systems. Its design and material composition are tailored to withstand the rigors of heavy-duty applications, contributing to the overall reliability and performance of commercial vehicles ¹.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of fastener characterized by its hexagonal head, which allows for efficient tightening and loosening using standard tools such as wrenches or sockets. These screws are widely used in mechanical assemblies to secure components together. The hexagonal shape of the head provides a stable and consistent grip, reducing the risk of cam-out and ensuring precise torque application ².

Purpose of the Cummins 3866613 Hexagon Head Cap Screw

The Cummins 3866613 Hexagon Head Cap Screw is specifically designed for use in truck operations. It is applied in various mechanical systems within the truck, including engine components, transmission assemblies, and chassis structures. This screw ensures that critical components remain securely fastened, contributing to the safe and efficient operation of the vehicle.

Key Features

The Cummins 3866613 Hexagon Head Cap Screw boasts several key features that enhance its functionality and durability. It is made from high-quality materials, typically a grade of steel that offers excellent strength and resistance to corrosion. The screw features a specific thread type that provides a strong and secure hold, while the hexagonal head design allows for easy and precise installation using standard tools. These features collectively contribute to the screw’s ability to perform reliably in demanding environments.

Benefits

Using the Cummins 3866613 Hexagon Head Cap Screw offers several benefits. The secure fastening provided by this screw helps to maintain the integrity of mechanical assemblies, reducing the risk of component failure. Its resistance to loosening ensures that connections remain tight over time, even under vibration and stress. Additionally, the compatibility with standard tools simplifies installation and maintenance procedures, making it a practical choice for commercial truck applications.

Installation and Usage

Proper installation of the Cummins 3866613 Hexagon Head Cap Screw is crucial for ensuring its effectiveness. It is recommended to use the appropriate torque specifications to achieve the desired level of tightness without over-tightening, which could damage the screw or the components being fastened. Standard wrenches or sockets can be used for installation, and it is important to ensure that the screw is fully engaged in the threaded hole to maximize its holding power.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws include loosening over time due to vibration or thermal expansion, and corrosion in harsh environments. Regular inspection and maintenance can help identify and address these issues. If a screw shows signs of loosening, it should be re-tightened to the specified torque. In cases of corrosion, the affected screw may need to be replaced to ensure the continued reliability of the assembly ².

Safety Considerations

When working with Hexagon Head Cap Screws, it is important to observe several safety practices. Proper handling and storage of screws can prevent damage and ensure they are in good condition for use. When installing or removing screws, use the correct tools and techniques to avoid injury or damage to the components. Additionally, always follow safety guidelines and wear appropriate personal protective equipment when performing maintenance tasks.

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 is committed to quality and innovation in the commercial truck industry. The company’s product range includes a variety of components and systems designed to enhance the performance, efficiency, and reliability of commercial vehicles. Cummins’ dedication to excellence is reflected in its comprehensive approach to product development and customer support.

Compatibility with Cummins Engines

The Cummins Hexagon Head Cap Screw, part number 3866613, is a versatile component designed to fit seamlessly with various Cummins engines. This screw is integral in securing different parts within the engine assembly, ensuring structural integrity and operational efficiency.

K19 and K38 Engines

The K19 and K38 engines, both part of Cummins’ robust lineup, benefit from the precision and reliability of the 3866613 screw. This part is crucial in maintaining the alignment and stability of engine components, contributing to the overall performance of these engines.

K50 Engine

The K50 engine also utilizes the 3866613 screw. Its design ensures that critical engine parts remain securely fastened, which is essential for the engine’s durability and longevity.

QSK19 CM850 MCRS and QSK60 CM850 MCRS Engines

The QSK19 CM850 MCRS and QSK60 CM850 MCRS engines incorporate the 3866613 screw in their construction. This screw’s role is pivotal in securing various engine components, ensuring that the engines operate smoothly and efficiently.

QSK50 CM2150 K107 and QSK50 CM2150 MCRS Engines

The QSK50 CM2150 K107 and QSK50 CM2150 MCRS engines also rely on the 3866613 screw. Its application in these engines highlights its importance in maintaining the structural integrity and operational efficiency of the engine components.

Role of Part 3866613 Hexagon Head Cap Screw in Engine Systems

The part 3866613 Hexagon Head Cap Screw is integral to the secure assembly and operation of various components within engine systems. It is employed in the fastening of connections at both the raw water inlet and outlet, ensuring a tight and reliable seal that prevents leaks and maintains the integrity of the water flow system.

In the context of the heat exchanger, this screw plays a significant role in securing the plumbing connections. Its application here is vital for maintaining the structural stability of the heat exchanger, which is essential for efficient heat transfer between the engine’s cooling system and the raw water.

When it comes to the raw water pump, the 3866613 screw is used in the hose plain mount and the seawater pump mount. These applications are fundamental for securing the pump to its designated location, ensuring that it operates within the specified parameters for optimal performance.

Furthermore, in the assembly of the seawater pump mounting and the seawater pipe mount, this screw ensures that all components are held firmly in place. This is particularly important in marine environments where vibrations and the dynamic nature of the sea can lead to loosening of components if not properly secured.

Lastly, within the service kit, the 3866613 Hexagon Head Cap Screw is often included for maintenance and repair purposes. It allows for the reassembly of components after servicing, ensuring that all parts are correctly and securely fastened, which is essential for the longevity and reliability of the engine system.

Conclusion

The Cummins 3866613 Hexagon Head Cap Screw is a critical component in the maintenance and operation of commercial trucks and engines. Its design, material composition, and compatibility with various Cummins engines make it an essential part for ensuring the secure assembly and reliable performance of mechanical systems. Proper installation, regular maintenance, and adherence to safety practices are key to maximizing the benefits of this Cummins part.