3936685
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3936685, is a component manufactured by Cummins, a well-established name in the automotive and heavy-duty truck industry. This screw is designed for specific applications within heavy-duty trucks, where it plays a significant role in ensuring the structural integrity and functionality of various truck components. Understanding its design, purpose, and benefits is essential for maintaining and optimizing truck performance.

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. This design allows for efficient torque application and provides a larger bearing surface, which helps distribute the load more evenly. In the automotive industry, flange head cap screws are commonly used for their ability to resist loosening under vibration and their durability in harsh environments ¹.

Purpose and Role in Truck Operations

The 3936685 Hexagon Flange Head Cap Screw is integral to heavy-duty truck operations. It is used in applications where secure fastening is required to withstand significant stress and vibration. By providing a stable and reliable connection between components, this screw contributes to the overall structural integrity and functionality of the truck. Its design ensures that critical parts remain securely fastened, even under demanding conditions ².

Key Features

The 3936685 Hexagon Flange Head Cap Screw features a hexagonal head that allows for easy and precise torque application using standard tools. The flange beneath the head provides an increased bearing surface, which helps prevent the screw from sinking into softer materials. The screw is made from high-quality materials, ensuring durability and resistance to corrosion. Its threading specifications are designed to provide a strong and secure hold, enhancing its performance and reliability in various applications ³.

Benefits

The benefits of using the 3936685 Hexagon Flange Head Cap Screw include improved torque application, resistance to loosening, and enhanced durability in harsh operating conditions. The hexagonal head design allows for efficient and precise tightening, while the flange feature provides additional stability. The material composition ensures that the screw can withstand corrosion and maintain its integrity over time. These features contribute to the overall efficiency and safety of truck operations by ensuring that components remain securely fastened ⁴.

Installation and Usage Guidelines

Proper installation of the 3936685 Hexagon Flange Head Cap Screw involves several steps to ensure a secure and lasting fastening. Begin by cleaning the mating surfaces to remove any debris or contaminants. Use a torque wrench to apply the recommended torque settings, which can be found in the manufacturer’s guidelines. Ensure that compatible fasteners and materials are used to avoid any issues with compatibility or performance. Following these best practices will help ensure that the screw provides a secure and reliable connection.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws include loosening, corrosion, and damage. To troubleshoot these problems, first, identify the cause, which could be improper torque application, environmental factors, or material incompatibility. To resolve loosening, re-tighten the screw to the recommended torque settings. For corrosion, clean the affected area and apply a suitable corrosion-resistant coating. Regular maintenance, such as periodic inspection and re-tightening, can help prolong the lifespan of the screw and ensure optimal performance.

Cummins: Manufacturer Overview

Cummins Inc. is a renowned manufacturer in the automotive industry, with a history of providing high-quality components for heavy-duty applications. The company is known for its commitment to quality and innovation, offering a wide range of products designed to meet the demanding requirements of the industry. Cummins’ focus on reliability and performance ensures that their components, including the 3936685 Hexagon Flange Head Cap Screw, are trusted by professionals for their durability and efficiency in heavy-duty truck operations.

Hexagon Flange Head Cap Screw (Part 3936685) in Cummins Engines

The Cummins part 3936685, a Hexagon Flange Head Cap Screw, is a critical component in various Cummins engine models. This screw is designed to secure different parts within the engine, ensuring structural integrity and operational efficiency. Below is a detailed look at how this part is utilized across several Cummins engines.

4B3.9 and 6B5.9 Engines

In the 4B3.9 and 6B5.9 engines, the Hexagon Flange Head Cap Screw is used to fasten components that require a secure and reliable connection. These engines, known for their robust performance, benefit from the precision and strength offered by this screw, particularly in areas where vibration and stress are common.

6C8.3 and L8.9 Engines

Similarly, in the 6C8.3 and L8.9 engines, the part 3936685 plays a vital role in maintaining the structural integrity of the engine. These engines, often used in heavy-duty applications, rely on the screw to ensure that critical components remain firmly in place, even under demanding conditions.

ISBE CM800 and QSB5.9 CM850 Engines

The ISBE CM800 and QSB5.9 CM850 engines also incorporate the Hexagon Flange Head Cap Screw in their design. This part is essential for securing various engine parts, ensuring that the engine operates smoothly and efficiently. The screw’s design allows for easy installation and removal, which is crucial during maintenance and repair processes.

QSB6.7 M CM2250 Engine

In the QSB6.7 M CM2250 engine, the Hexagon Flange Head Cap Screw is used to fasten components that are subjected to high levels of stress and vibration. The screw’s flange head provides a larger surface area for the application of torque, ensuring a secure fit that can withstand the rigors of heavy-duty operation.

Summary

The Cummins part 3936685, a Hexagon Flange Head Cap Screw, is integral to the functionality and durability of several Cummins engine models. Its use across the 4B3.9, 6B5.9, 6C8.3, L8.9, ISBE CM800, QSB5.9 CM850, and QSB6.7 M CM2250 engines highlights its versatility and importance in maintaining engine integrity and performance.

Role of Part 3936685 Hexagon Flange Head Cap Screw in Engine Systems

In the realm of engine systems, the part 3936685 Hexagon Flange Head Cap Screw is instrumental in ensuring the secure assembly and operation of various components. This screw is commonly utilized in the integration and fastening of fuel shut-off systems, which are vital for the safe and efficient operation of engines.

Fuel Shut-Off Systems

The Hexagon Flange Head Cap Screw is frequently employed in the assembly of fuel shut-off kits, such as the 4-cylinder 24V fuel shut-off kit and various other configurations including the BB 12V and 24V fuel shutoff kits. These kits are designed to halt fuel flow in emergency situations or during maintenance, ensuring safety and preventing fuel leakage. The screw’s robust design provides the necessary torque and resistance to maintain a secure connection, which is essential for the reliable operation of these kits.

Water Outlet Connections

In engine systems, the water outlet plays a significant role in regulating the flow of coolant. The Hexagon Flange Head Cap Screw is often used to fasten the water outlet to the engine block or head, ensuring a leak-proof seal. This connection is vital for maintaining the integrity of the cooling system, which in turn helps in managing engine temperature and preventing overheating.

Fuel Shutoff Valve Kits

The screw is also a key component in the assembly of fuel shutoff valve kits. These kits, which include models like the Chrysler 12V fuel shutoff kit and the Ford 12V and 24V fuel shutoff kits, rely on the secure fastening provided by the Hexagon Flange Head Cap Screw to ensure that the valve operates correctly. Proper installation of these valves is essential for the safe and efficient management of fuel flow within the engine system.

Engine Control Modules

In more complex engine systems, the Hexagon Flange Head Cap Screw may be used in the mounting and securing of engine control modules. These modules are responsible for monitoring and controlling various engine functions, and a secure attachment is necessary to ensure their proper operation and durability.

Vertical and Horizontal Fuel Shutoff Kits

For both vertical and horizontal fuel shutoff kits, the Hexagon Flange Head Cap Screw provides the necessary strength and stability. Whether it’s a horizontal 24V fuel shutoff kit or a vertical 12V or 24V fuel shutoff kit, the screw ensures that all components are firmly in place, contributing to the overall reliability and safety of the engine system.

Conclusion

In summary, the part 3936685 Hexagon Flange Head Cap Screw plays a significant role in the assembly and secure operation of various engine components, including fuel shut-off systems, water outlets, and engine control modules. Its application ensures that these critical parts function correctly, contributing to the overall performance and safety of the engine.