3968471
Twelve Point Cap Screw
Cummins®

The Twelve Point Cap Screw, Part #3968471, manufactured by Cummins, is a specialized fastener designed for use in commercial trucks. Cummins, a well-established name in the commercial truck industry, produces a range of components that ensure the reliability and efficiency of truck operations. This particular cap screw is integral to various mechanical applications within commercial trucks, providing secure fastening and contributing to the overall performance and durability of the vehicle.

Basic Concepts of Twelve Point Cap Screws

A twelve point cap screw is a type of fastener characterized by its hexagonal socket head, which offers twelve points of contact instead of the six found on traditional hex cap screws. This design allows for a greater contact area, which can enhance torque application and reduce the likelihood of cam-out during tightening ¹. Twelve point cap screws are commonly used in applications where high torque and secure fastening are required, making them suitable for various mechanical and industrial uses.

Purpose and Role in Truck Operation

The Twelve Point Cap Screw, Part #3968471, plays a specific role in the operation of commercial trucks. It is typically used in components or systems where secure and reliable fastening is necessary. This includes applications such as engine mounts, transmission components, and chassis assemblies. The screw ensures that critical parts remain firmly in place, contributing to the safe and efficient operation of the truck ².

Key Features

The Twelve Point Cap Screw, Part #3968471, features a robust design that includes a hexagonal socket head with twelve points. This design provides a larger contact area compared to standard hex cap screws, enhancing torque application and reducing the risk of cam-out. The screw is made from high-quality materials, ensuring durability and resistance to corrosion. Its threading is precise, allowing for secure and consistent fastening. Additionally, the screw may have unique characteristics such as a corrosion-resistant coating or specialized threading to meet the demanding requirements of commercial truck applications ³.

Benefits

The Twelve Point Cap Screw, Part #3968471, offers several benefits that make it suitable for use in commercial trucks. Its design allows for improved torque application, ensuring that fasteners are tightened to the required specifications without slipping. The reduced cam-out risk enhances the security of the fastening, minimizing the chance of loosening over time. Additionally, the screw’s material and construction provide enhanced resistance to corrosion, prolonging its service life and maintaining the integrity of the fastened components ⁴.

Installation Considerations

Proper installation of the Twelve Point Cap Screw, Part #3968471, is crucial to ensure secure fastening and optimal performance. It is important to follow torque specifications provided by the manufacturer to achieve the correct tightening force. Using the appropriate tools, such as a torque wrench, ensures that the screw is tightened to the specified torque without overtightening, which could damage the fastener or the components being joined. Best practices include cleaning the mating surfaces before installation to remove any debris or corrosion that could affect the fastening integrity ⁵.

Troubleshooting and Maintenance

Common issues with the Twelve Point Cap Screw, Part #3968471, may include loosening or corrosion. Regular inspection of the fasteners can help identify any signs of wear or damage. If loosening is detected, re-tightening to the specified torque is recommended. In cases of corrosion, cleaning the affected areas and applying a corrosion-resistant coating can help prolong the service life of the screw. Maintenance tips include periodic checks of the fasteners to ensure they remain secure and free from damage ⁶.

Compatibility and Application

The Twelve Point Cap Screw, Part #3968471, is designed for use in various applications within commercial trucks. It is compatible with a range of components and systems where secure fastening is required. Typical applications include engine mounts, transmission components, and chassis assemblies. When selecting fasteners for specific applications, it is important to consider compatibility with other components to ensure optimal performance and durability ⁷.

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 in the commercial truck industry for producing reliable and high-performance components. The company’s product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of commercial truck applications. Cummins’ commitment to innovation and quality ensures that their products contribute to the efficiency, reliability, and durability of commercial trucks ⁸.

Twelve Point Cap Screw 3968471 in Cummins Engines

The Twelve Point Cap Screw 3968471 is a critical component utilized across various Cummins engine models. This part is essential for securing different engine components, ensuring structural integrity and operational efficiency.

Cummins 4B3.9 and QSB3.9 30 CM550

In the Cummins 4B3.9 and QSB3.9 30 CM550 engines, the 3968471 screw is used to fasten various parts of the engine block and other critical assemblies. Its twelve-point design provides a secure grip, which is crucial for maintaining the alignment and stability of engine components under high stress ⁹.

Cummins 6B5.9 and QSB5.9 Series

For the 6B5.9 and QSB5.9 engines, including the QSB5.9 30 CM550, QSB5.9 44 CM550, and QSB6.7 CM850 (CM2850), the 3968471 screw is employed in several key areas. These include securing the cylinder head to the engine block, fastening components of the fuel injection system, and ensuring the proper alignment of various engine parts. The robust design of the screw is particularly beneficial in these engines, which are known for their high power output and durability ¹⁰.

Cummins B4.5 and B4.5 RGT

In the B4.5 and B4.5 RGT engines, the 3968471 screw is used to fasten components such as the turbocharger housing and other critical parts. Its twelve-point configuration ensures a tight and reliable connection, which is essential for the smooth operation of these engines ¹¹.

Cummins B5.9 G and B5.9 GAS PLUS CM556

For the B5.9 G and B5.9 GAS PLUS CM556 engines, the 3968471 screw is utilized in securing the engine block and other structural components. Its design provides the necessary strength and stability to withstand the operational stresses of these engines ¹².

Cummins ISB CM550 and ISBE CM800

In the ISB CM550 and ISBE CM800 engines, the 3968471 screw is used to fasten various components, including those related to the fuel system and exhaust system. The screw’s twelve-point design ensures a secure fit, which is crucial for the efficient operation of these engines ¹³.

Cummins QSB7 CM2880 B117

In the QSB7 CM2880 B117 engine, the 3968471 screw is employed to secure critical components such as the engine block and other structural parts. Its design provides the necessary strength and stability to ensure the engine operates reliably under various conditions ¹⁴.

The Twelve Point Cap Screw 3968471 is a versatile and essential component in Cummins engines, providing the necessary strength and reliability for various applications.

Role of Part 3968471 Twelve Point Cap Screw in Engine Systems

In the intricate assembly of engine systems, the part 3968471 Twelve Point Cap Screw serves as a fundamental fastening element. Its application is widespread across various components, ensuring secure and reliable connections.

Attachment and Fastening

The Twelve Point Cap Screw is primarily utilized for the secure attachment of components. In the context of the starting motor, this screw plays a significant role in attaching the motor to its mounting bracket. This attachment is essential for maintaining the structural integrity and alignment of the starting motor, which is vital for the engine’s starting process ¹⁵.

Starting Motor Mounting

When it comes to the mounting of the starting motor, the Twelve Point Cap Screw is instrumental. It provides the necessary tension and stability to keep the starting motor firmly in place. This is particularly important during the engine’s operation, where vibrations and mechanical stresses are common. The screw’s design allows for a tight and durable connection, minimizing the risk of loosening over time ¹⁶.

General Mounting Applications

Beyond the starting motor, the Twelve Point Cap Screw is also employed in various other mounting applications within the engine system. Whether it’s securing auxiliary components or attaching panels, this screw ensures that all parts remain in their designated positions, contributing to the overall efficiency and safety of the engine ¹⁷.

Conclusion

In summary, the part 3968471 Twelve Point Cap Screw is a versatile and reliable component in engine systems. Its role in attachment and mounting is indispensable, providing the necessary stability and security for the proper functioning of engine components.