3944655
Studded Flange Cap Screw
Cummins®

Studded flange cap screws are essential components in the assembly and maintenance of commercial trucks. They secure various parts and ensure the structural integrity of the vehicle. This discussion focuses on the 3944655 Studded Flange Cap Screw by Cummins, a model designed specifically for heavy-duty applications.

Basic Concepts

A studded flange cap screw is a type of fastener that includes a threaded stud and a flanged head. The stud extends beyond the nut, allowing for additional components to be attached. The flange provides a larger surface area for distribution of clamping force, reducing the risk of damage to the fastened material. In a truck’s mechanical system, these screws play a role in securing critical components, ensuring they remain in place under various operational conditions ¹.

Purpose and Function

The 3944655 Studded Flange Cap Screw by Cummins is designed to secure components within a truck’s mechanical system. Its primary function is to provide a strong, reliable connection between parts, which is vital for the safe and efficient operation of the vehicle. By securing components, it helps maintain the structural integrity of the truck, ensuring that parts remain in place and function correctly under the stresses of heavy-duty use ².

Key Features

The 3944655 Studded Flange Cap Screw boasts several key features that make it suitable for heavy-duty applications. It is constructed from high-quality materials, ensuring durability and resistance to wear. The threading type is designed to provide a secure fit, while the flange design distributes clamping force effectively, minimizing the risk of damage to the fastened material. These features contribute to the screw’s reliability and performance in demanding environments ³.

Benefits

The advantages of using the 3944655 Studded Flange Cap Screw include enhanced durability, resistance to vibration, and ease of installation. Its robust construction allows it to withstand the rigors of heavy-duty use, while its design helps prevent loosening due to vibration. Additionally, the flange design facilitates easy installation and removal, making it a practical choice for maintenance and repair tasks ⁴.

Troubleshooting and Maintenance

Common issues associated with studded flange cap screws include loosening due to vibration and corrosion. To address these problems, regular inspection and maintenance are recommended. Ensuring that screws are properly tightened and protected from corrosion can help prevent issues and ensure longevity. Additionally, replacing worn or damaged screws promptly can help maintain the structural integrity of the truck ⁵.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and commitment to quality, Cummins plays a significant role in the commercial truck industry. The company’s focus on developing reliable and efficient components, such as the 3944655 Studded Flange Cap Screw, underscores its dedication to enhancing the performance and durability of commercial vehicles.

Compatibility of 3944655 with Cummins Engines

The Studded Flange Cap Screw part number 3944655, manufactured by Cummins, is a crucial component in securing flanges and ensuring the integrity of various engine systems. This part is designed to fit a wide range of Cummins engines, providing a reliable fastening solution for critical applications. Below is a detailed breakdown of the engines with which this part is compatible.

Small Bore Engines

• 4B3.9
• 6B5.9

Medium Bore Engines

• 6C8.3
• B4.5 CM2350 B129B
• B5.6 CM2670 B152B
• B5.9 CM2670 B166C
• D4.0 CM2620 D103B

Large Bore Engines

• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125
• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

Cummins ISB and ISD Engines

• ISB (Chrysler)
• ISB CM2150
• ISB CM550
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB4.5 CM2350 B104
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B127

The 3944655 Studded Flange Cap Screw is engineered to meet the stringent requirements of Cummins engines, ensuring a secure and durable connection in various operational environments. Its compatibility across a broad spectrum of engine models underscores its versatility and importance in maintaining engine performance and safety.

Role of 3944655 in Engine Systems

The 3944655 Studded Flange Cap Screw is integral to the secure assembly and operation of various engine components. Its primary function is to provide a robust fastening solution that ensures components remain firmly in place under the demanding conditions within an engine system.

Turbocharger Arrangement

In turbocharger setups, the Studded Flange Cap Screw is used to secure the turbocharger to its mounting points. This ensures that the turbocharger remains stable and aligned correctly, which is essential for efficient airflow and performance. It also helps in maintaining the integrity of the turbocharger’s connection to the exhaust manifold, preventing leaks and ensuring optimal turbo efficiency.

Exhaust Manifold and Mounting

The Studded Flange Cap Screw plays a significant role in the exhaust manifold arrangement. It is employed to fasten the exhaust manifold to the cylinder block, ensuring a tight seal that prevents exhaust gases from escaping. This not only enhances engine performance but also reduces emissions. Additionally, it secures the exhaust manifold mounting, providing stability and durability under high temperatures and pressures.

Injector Plumbing

In injector plumbing systems, the Studded Flange Cap Screw is utilized to secure injectors in place. This ensures that the injectors are properly aligned and sealed, which is vital for precise fuel delivery and combustion efficiency. The secure fastening provided by this screw helps maintain the integrity of the fuel system, contributing to overall engine performance and reliability.

Long Block Assembly

Within the long block assembly, the Studded Flange Cap Screw is used to fasten various components such as the cam follower and cylinder block. This ensures that these parts remain securely in place, allowing for smooth operation and reducing the risk of mechanical failure. The screw’s design provides the necessary strength and stability required in the high-stress environment of the engine.

Exhaust Recirculation

In systems involving exhaust recirculation, the Studded Flange Cap Screw is employed to secure components that manage the flow of recirculated exhaust gases. This helps in reducing emissions and improving fuel efficiency. The screw ensures that these components are tightly fastened, maintaining the effectiveness of the recirculation process.

Heat Shield Arrangement

The Studded Flange Cap Screw is also used in the arrangement of heat shields. These shields protect nearby components from the high temperatures generated by the engine. Secure fastening with this screw ensures that the heat shields remain in place, providing consistent protection and contributing to the longevity of surrounding parts.

Manifold and Exhaust Mounting

Finally, the screw is crucial in the mounting of manifolds and exhaust systems. It ensures that these components are firmly attached, preventing vibrations and movement that could lead to damage or reduced performance. The secure attachment provided by the Studded Flange Cap Screw is essential for the durability and efficiency of the engine’s exhaust system.

Conclusion

The 3944655 Studded Flange Cap Screw by Cummins is a vital component in the assembly and maintenance of commercial trucks and Cummins engines. Its robust design, compatibility with a wide range of engines, and key features make it an essential part for ensuring the structural integrity and performance of heavy-duty vehicles. Regular maintenance and proper use of this part are crucial for the longevity and efficiency of the engine systems it supports.