3938036
Hexagon Flange Head Cap Screw
Cummins®

Introduction

The Hexagon Flange Head Cap Screw, specifically Part #3938036 by Cummins, is a critical component in the realm of commercial trucks. Cummins, a renowned manufacturer in the industry, produces this screw to meet the demanding requirements of heavy-duty applications. This screw is integral to the structural integrity and operational efficiency of commercial trucks.

Basic Concepts

Hexagon Flange Head Cap Screws are designed with a hexagonal head and a flanged base, which provides a larger bearing surface and enhanced resistance to loosening ¹. These screws are typically made from high-strength materials such as alloy steel, which ensures durability and reliability under heavy loads ². In the automotive industry, they are commonly used to secure critical components, ensuring that parts remain firmly in place despite vibrations and dynamic loads.

Functionality and Operation

Within the context of a commercial truck, the Hexagon Flange Head Cap Screw operates by securely fastening components together. Its hexagonal head allows for efficient torque application using standard tools, while the flange distributes the load over a larger area, reducing the risk of the screw pulling through the material ³. This design ensures that the components remain securely attached, contributing to the overall structural integrity of the truck.

Purpose of the 3938036 Hexagon Flange Head Cap Screw

This part plays a specific role in the operation of a truck. It is utilized in various truck systems and assemblies where secure fastening is paramount. This includes applications in the engine compartment, chassis, and other critical areas where components must withstand significant stress and vibration.

Key Features

The primary characteristics of the 3938036 Hexagon Flange Head Cap Screw include its hexagonal head design, which facilitates easy and precise tool engagement. The flange feature provides additional surface area for load distribution, enhancing the screw’s resistance to loosening. Additionally, its cap screw functionality ensures a clean, countersunk finish, which is often required in aesthetic and functional applications.

Benefits

This Cummins part offers several advantages. Its design enhances fastening security, making it less prone to loosening over time. The material used in its construction provides excellent durability, ensuring it can withstand the rigors of heavy-duty applications. Additionally, the flange feature contributes to improved load distribution, reducing the risk of component failure.

Installation Considerations

Proper installation of the 3938036 Hexagon Flange Head Cap Screw is crucial for its performance. It is important to adhere to the specified torque values to ensure the screw is tightened to the correct level without over-tightening, which could lead to damage. Adequate thread engagement is also necessary to ensure the screw can bear the intended load. Compatibility with other components should be verified to ensure a secure and lasting connection.

Troubleshooting and Maintenance

Common issues with the 3938036 Hexagon Flange Head Cap Screw include corrosion, loosening, or damage. Regular inspection for signs of wear or corrosion is recommended. If loosening is detected, re-tightening to the specified torque is advised. In cases of damage, replacement of the screw may be necessary to maintain structural integrity. Routine maintenance practices, such as cleaning and applying anti-corrosion treatments, can help ensure optimal performance.

Cummins Overview

Cummins Inc. is a leading manufacturer in the commercial truck industry, known for its high-quality engines, components, and technologies. Founded in 1919, Cummins has a long-standing reputation for innovation and reliability. The company offers a wide range of products designed to meet the needs of heavy-duty applications, ensuring that commercial trucks operate efficiently and reliably. The 3938036 Hexagon Flange Head Cap Screw is a testament to Cummins’ commitment to quality and performance in the automotive sector.

Cummins Engine Compatibility with Hexagon Flange Head Cap Screw Part 3938036

The Cummins Hexagon Flange Head Cap Screw part number 3938036 is a versatile component designed to fit various Cummins engine models. This screw is integral in securing different parts within the engine assembly, ensuring structural integrity and operational efficiency.

Cummins B and 6 Series Engines

The part 3938036 is compatible with several B and 6 series engines, including:

• 4B3.9
• 6B5.9
• 6C8.3
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125
• G5.9

These engines benefit from the screw’s ability to withstand high torque and pressure, making it suitable for securing various engine components.

Cummins ISB Engines

The ISB series engines also utilize the part 3938036, which is essential for maintaining the integrity of the engine’s internal and external structures. Compatible models include:

• ISB (Chrysler)
• ISB CM2150
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB5.9 CM2880 B110
• ISB6.7 CM2250
• ISB6.7 CM2350 B101

This screw is particularly useful in applications requiring robust fastening solutions, such as securing engine blocks, covers, and other critical parts.

Cummins ISBE and QSB Engines

The ISBE and QSB engines also incorporate the part 3938036 for its reliability and strength. Compatible models include:

• ISBE4 CM850
• QSB4.5 CM2250 EC
• QSB5.9 30 CM550
• QSB5.9 CM2880 B115
• QSB6.7 CM2250
• QSB6.7 CM850 (CM2850)
• QSB6.7 M CM2250
• QSB7 CM2880 B117

In these engines, the screw’s design ensures a secure fit, which is crucial for the proper functioning and longevity of the engine components.

Role of Part 3938036 Hexagon Flange Head Cap Screw in Engine Systems

The part 3938036 Hexagon Flange Head Cap Screw is integral to the secure assembly and operation of various engine components. It is employed in fastening the air intake connection to the air intake manifold cover, ensuring a tight seal that is essential for optimal airflow into the engine.

In the arrangement of the turbocharger, this screw plays a significant role in attaching the turbocharger to its designated location, maintaining the structural integrity and alignment necessary for efficient turbo operation.

For the engine mounting, the Hexagon Flange Head Cap Screw is utilized to secure the engine to its frame, providing the necessary stability during operation. Similarly, in the expansion tank mounting for the cooling system, it ensures that the tank is firmly attached, preventing leaks and maintaining system pressure.

In the fuel system, this screw is vital for the secure attachment of the fuel injection pump and fuel plumbing to the fuel pump. It ensures that the fuel lines are correctly positioned and sealed, which is important for the consistent delivery of fuel to the engine.

The screw is also used in the manifold connections, particularly where the manifold meets the air intake and fuel control module. This ensures that the manifold is securely fastened, allowing for efficient air and fuel mixture distribution.

Additionally, in the mounting of the fuel pump and the connection of the oil level gauge to the oil pan, the Hexagon Flange Head Cap Screw provides the required fastening strength.

In the plumbing systems, whether for compressor air discharge or fuel, this screw is employed to secure connections, ensuring that all lines are properly sealed and aligned.

Lastly, in the attachment of the fuel pump to the fuel tank and the expansion tank to the engine, the use of this screw is essential for maintaining the structural and functional integrity of these components.

Conclusion

The 3938036 Hexagon Flange Head Cap Screw by Cummins is a vital component in the assembly and operation of commercial truck engines. Its robust design, compatibility with various Cummins engine models, and critical role in securing engine components make it an indispensable part in the automotive industry. Proper installation, maintenance, and understanding of its applications ensure the longevity and efficiency of the engines it serves.