3936684
Hexagon Flange Head Cap Screw
Cummins®

Introduction

The Hexagon Flange Head Cap Screw, identified by part number 3936684, is a component manufactured by Cummins, a prominent name in the commercial truck industry. This screw plays a significant role in the maintenance and operation of commercial trucks, ensuring the integrity and functionality of various truck components. Cummins is renowned for its high-quality truck parts, and the 3936684 screw is no exception, offering reliability and performance in demanding applications.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flanged base. This design allows for efficient torque application and provides a larger bearing surface, which helps distribute loads more evenly ¹. In the automotive industry, these screws are commonly used in mechanical assemblies where secure fastening and resistance to loosening are required. They are particularly useful in applications where access to the fastener head may be limited, as the hexagonal shape allows for easy tightening and loosening with standard tools.

Purpose and Role in Truck Operation

The 3936684 Hexagon Flange Head Cap Screw serves a specific purpose in the context of heavy-duty trucks. It is designed to fasten components that require a high degree of structural integrity and resistance to vibration. By securely holding parts together, this screw contributes to the overall stability and performance of the truck. Its role is vital in applications where components are subjected to significant stress and dynamic loads, ensuring that critical connections remain intact under operating conditions ².

Key Features

The 3936684 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance and durability. Its hexagonal head design allows for efficient torque application, making it easier to achieve the required tightening force. The flange at the base of the screw provides an increased bearing surface, which helps distribute loads more evenly and reduces the risk of the screw pulling through the material. Additionally, the screw is made from high-quality materials that offer excellent resistance to corrosion and wear, ensuring long-lasting performance in harsh environments ³.

Benefits

Using the 3936684 Hexagon Flange Head Cap Screw offers several benefits. The screw’s design allows for improved torque application, ensuring that components are securely fastened. Its resistance to loosening makes it ideal for applications where vibrations are common. Furthermore, the flanged base enhances load distribution, reducing stress on the fastening point and prolonging the lifespan of both the screw and the connected components.

Installation and Usage

Proper installation of the 3936684 Hexagon Flange Head Cap Screw is crucial for optimal performance. It is recommended to use the appropriate torque specifications provided by Cummins to ensure that the screw is tightened to the correct level. This prevents over-tightening, which can lead to damage, and under-tightening, which can result in loosening. Best practices include using a torque wrench for accurate tightening and periodically checking the fastener to ensure it remains secure during operation ⁴.

Troubleshooting and Maintenance

Common issues with the 3936684 Hexagon Flange Head Cap Screw may include loosening or corrosion. To address these problems, regular inspections should be conducted to ensure the screw remains tight and free from corrosion. If loosening is detected, re-tightening to the specified torque is recommended. In cases of corrosion, the affected screw should be replaced to maintain the integrity of the fastening. Proper maintenance, including protection from environmental factors and periodic checks, will help prolong the screw’s lifespan and ensure continued reliable operation.

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 has established a strong reputation for quality and innovation in the commercial truck industry. The company offers a wide range of products, including engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of heavy-duty applications. Cummins’ commitment to excellence and customer satisfaction makes it a trusted source for high-quality truck components.

Cummins Part 3936684 Hexagon Flange Head Cap Screw in Engine Applications

The Cummins part 3936684, a Hexagon Flange Head Cap Screw, is a critical component in various engine assemblies. This part is designed to provide secure fastening in high-stress environments, ensuring the integrity and reliability of the engine’s structure.

Application in Specific Engines

• 15N CM2380 M104B: This engine benefits from the robust fastening capabilities of the Hexagon Flange Head Cap Screw. The part is used in securing various engine components, ensuring that they remain tightly fastened under operational stresses.

• 4B3.9 and 6B5.9: These engines utilize the 3936684 screw in several key areas. The screw’s design allows for precise and reliable fastening, which is crucial for maintaining the alignment and stability of engine parts during operation.

• 6C8.3 and L8.9: In these engines, the Hexagon Flange Head Cap Screw is employed to secure components that are subject to significant mechanical forces. The screw’s flange head provides a larger surface area for the wrench, facilitating easier and more effective tightening.

Grouping of Engines

The engines 4B3.9, 6B5.9, 6C8.3, and L8.9 share a commonality in their use of the 3936684 screw for critical fastening tasks. These engines are often found in heavy-duty applications where reliability and durability are paramount. The screw’s design ensures that these engines can operate under demanding conditions without compromising on performance or safety.

Role of Part 3936684 Hexagon Flange Head Cap Screw in Engine Systems

The part 3936684 Hexagon Flange Head Cap Screw is integral to the assembly and secure operation of various engine components. This screw is utilized in fastening and securing critical elements within engine systems, ensuring stability and reliable performance.

Application in Fuel Shut-Off Systems

In the 4-cylinder 24V fuel shut-off kit, the Hexagon Flange Head Cap Screw is employed to secure the bracket solenoid kit, ensuring that the solenoid remains firmly attached to the engine block. This secure attachment is vital for the proper functioning of the solenoid, which controls the fuel shut-off valve.

For the BB 12V fuel shutoff kit and BB 24V fuel shutoff kit, the screw plays a similar role. It ensures that the solenoid and associated components are tightly fastened, preventing any movement that could disrupt the fuel shut-off process.

Integration with Throttle Control Systems

In systems involving the manual throttle lever and air shutdown device, the Hexagon Flange Head Cap Screw is used to secure the lever and device to the engine frame. This secure attachment ensures that the throttle lever operates smoothly and the air shutdown device functions correctly during engine operation.

Usage in Various Fuel Shutoff Valve Kits

Across different fuel shutoff valve kits, such as the Chrysler 12V fuel shutoff kit, Ford 12V fuel shutoff kit, and Ford 24V fuel shutoff kit, the screw is essential for fastening the valve components. It ensures that the valve remains in place and operates efficiently, contributing to the overall reliability of the fuel shutoff system.

Application in Horizontal and Vertical Fuel Shutoff Systems

For the horizontal 24V fuel shutoff kit and various vertical 12V and 24V fuel shutoff kits, the Hexagon Flange Head Cap Screw is utilized to secure the fuel shutoff valve and associated components. This ensures that the valve can perform its function without any risk of detachment or misalignment.

Role in Power Distribution and Control

In the PDC (Power Distribution Center) kit, the screw is used to secure electrical components and wiring harnesses. This ensures that the electrical connections remain stable and secure, preventing any issues that could arise from loose connections.

Ensuring Stability in Throttle and Valve Systems

The screw is also crucial in securing the throttle lever and fuel shutoff valve in place. This stability is essential for the precise control of fuel and air intake, directly impacting engine performance and efficiency.

Conclusion

In summary, the part 3936684 Hexagon Flange Head Cap Screw is a fundamental component in the secure assembly and reliable operation of various engine systems, including fuel shut-off kits, throttle control systems, and power distribution components. Its robust design and high-quality materials make it an essential part for ensuring the integrity and performance of heavy-duty engines.