3967746
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3967746, is a specialized fastener produced by Cummins. This screw is integral to the maintenance and operation of commercial trucks, providing a secure and reliable fastening solution for various components. Cummins, a renowned manufacturer in the commercial truck industry, ensures that this part meets the rigorous demands of heavy-duty applications.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of bolt characterized by its hexagonal head and a flange that sits against the surface of the material being fastened. This design allows for efficient torque application and provides a larger bearing surface, which helps distribute the load more evenly. Within mechanical systems, these screws play a role in securing components, ensuring structural integrity and reliable operation ¹.

Purpose and Role in Truck Operation

The 3967746 Hexagon Flange Head Cap Screw serves a specific purpose in truck operations by securing critical components and assemblies. It is commonly used in applications where high torque and resistance to loosening are required. This screw supports various systems within the truck, including engine components, chassis parts, and other structural elements, ensuring they remain firmly in place under operational stress ².

Key Features

The 3967746 Hexagon Flange Head Cap Screw features a hexagonal flange head design, which allows for easy tightening and loosening using standard tools. It is typically made from high-strength materials, such as alloy steel, to ensure durability and resistance to wear. The flange provides additional surface area, enhancing the screw’s ability to withstand vibrational forces and maintain a secure hold ³.

Benefits

Using the 3967746 Hexagon Flange Head Cap Screw offers several benefits. Its design enhances fastening security, reducing the risk of loosening due to vibration. The flange head provides a larger contact area, which helps distribute the load more effectively. Additionally, the screw is easy to install and remove, making maintenance procedures more efficient ⁴.

Installation and Usage

Proper installation of the 3967746 Hexagon Flange Head Cap Screw is vital to ensure optimal performance and longevity. It should be installed using the correct torque specifications provided by the manufacturer to avoid over-tightening or under-tightening. Best practices include using a torque wrench to apply the specified torque and ensuring that the flange is seated properly against the surface to maximize load distribution.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws include loosening due to vibration and corrosion. Regular inspection and maintenance can help identify and address these issues promptly. If corrosion is detected, the affected screw should be replaced to prevent further degradation. Ensuring that all screws are tightened to the correct torque specifications during installation can help prevent loosening.

Safety Considerations

When working with Hexagon Flange Head Cap Screws, it is important to observe several safety guidelines. Proper handling and storage of the screws are necessary to prevent damage and ensure they remain clean and free from contaminants. When installing or removing screws, use the appropriate tools and follow safety protocols to avoid injury. In a commercial truck environment, always ensure that all fasteners are securely tightened to maintain the structural integrity of the vehicle.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history of innovation and quality, Cummins has established a strong reputation in the commercial truck industry. The company is committed to providing reliable and high-performance parts, including the 3967746 Hexagon Flange Head Cap Screw, to support the demanding requirements of heavy-duty applications.

Hexagon Flange Head Cap Screw 3967746 Compatibility with Cummins Engines

The Cummins part number 3967746, a Hexagon Flange Head Cap Screw, is designed to fit a variety of Cummins engines. This part is integral in securing components within the engine assembly, ensuring structural integrity and operational efficiency. Below is a detailed breakdown of the engines with which this part is compatible:

4B3.9 and 6B5.9 Engines

The 4B3.9 and 6B5.9 engines are part of the B-series family, known for their robust performance and reliability. The Hexagon Flange Head Cap Screw 3967746 is used in these engines to secure various components, including cylinder heads and engine blocks, ensuring that these parts remain tightly fastened under the high pressures and temperatures encountered during operation.

B3.9 G, B5.9 G, and G5.9 Engines

The B3.9 G, B5.9 G, and G5.9 engines are part of the G-series family, which is designed for heavy-duty applications. The 3967746 screw is used in these engines to secure critical components such as the turbocharger housing, exhaust manifolds, and other ancillary parts. This ensures that these components are securely fastened, which is crucial for maintaining the engine’s performance and longevity.

B5.9 GAS PLUS CM556 and G5.9 CM558 Engines

The B5.9 GAS PLUS CM556 and G5.9 CM558 engines are advanced versions of the G-series engines, featuring enhanced performance and efficiency. The Hexagon Flange Head Cap Screw 3967746 is used in these engines to secure components such as the intake manifold, fuel injectors, and other critical parts. This ensures that these components are tightly fastened, which is essential for maintaining the engine’s performance and efficiency.

ISB5.9G CM2180 and QSL9.3 CM2880 L113 Engines

The ISB5.9G CM2180 and QSL9.3 CM2880 L113 engines are part of the QSK-series family, known for their high power output and reliability. The 3967746 screw is used in these engines to secure components such as the cylinder heads, engine blocks, and other critical parts. This ensures that these components are tightly fastened, which is essential for maintaining the engine’s performance and reliability.

L8.9 CM2670 L134C and L9.3 L105 Engines

The L8.9 CM2670 L134C and L9.3 L105 engines are part of the L-series family, designed for medium-duty applications. The Hexagon Flange Head Cap Screw 3967746 is used in these engines to secure components such as the cylinder heads, engine blocks, and other critical parts. This ensures that these components are tightly fastened, which is essential for maintaining the engine’s performance and reliability.

In summary, the Cummins part number 3967746 is a versatile and essential component used across a wide range of Cummins engines. Its primary function is to secure various components within the engine assembly, ensuring that these parts remain tightly fastened under the high pressures and temperatures encountered during operation. This helps to maintain the engine’s performance, efficiency, and longevity.

Role of Part 3967746 Hexagon Flange Head Cap Screw in Engine Components

The part 3967746 Hexagon Flange Head Cap Screw is instrumental in securing and maintaining the integrity of various engine components. Its robust design ensures reliable fastening in high-stress environments.

Connection Points

This screw is often used at connection points where secure fastening is required to prevent leaks or component separation. For instance, it plays a significant role in the water inlet connection, ensuring that the water inlet is firmly attached to the engine block, thus maintaining a sealed system for coolant flow.

Cover Attachments

In applications involving covers, such as the front gear cover, the Hexagon Flange Head Cap Screw provides the necessary clamping force to keep the cover in place. This is vital for protecting internal components and maintaining the engine’s structural integrity.

Front Gear and Timing Pin Housing

When it comes to the front gear and timing pin housing, this screw ensures that these components remain securely fastened. Proper attachment is essential for the precise operation of the engine’s timing system, which is fundamental for engine performance and reliability.

Mounting and Intake Connections

The screw is also utilized in mounting applications, where it helps in securing various engine mounts to the chassis or other structural components. Additionally, in the intake connection, it ensures that the intake system is properly sealed and aligned, which is important for optimal air flow into the engine.

Short Block Kit

In the context of a short block kit, the Hexagon Flange Head Cap Screw is used to fasten various components within the kit, ensuring that all parts are correctly assembled and secured. This is particularly important for the initial setup and any subsequent maintenance or repair procedures.

Overall, the part 3967746 Hexagon Flange Head Cap Screw is a versatile fastener that contributes to the secure assembly and reliable operation of multiple engine components.

Conclusion

The 3967746 Hexagon Flange Head Cap Screw is a critical component in the maintenance and operation of commercial trucks. Its robust design and compatibility with various Cummins engines make it an essential fastener for securing critical components and ensuring the structural integrity and reliable operation of engine systems. Proper installation, regular maintenance, and adherence to safety guidelines are vital to maximize the performance and longevity of this part.