3900632
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, Part #3900632 by Cummins, is a specialized fastener designed for use in commercial truck applications. Cummins, a well-established manufacturer in the automotive and heavy-duty truck industries, produces this screw to meet the demanding requirements of truck components. This part is integral to ensuring the secure fastening of various truck parts, contributing to the overall reliability and performance of commercial vehicles.

Basic Concepts

The Hexagon Flange Head Cap Screw is characterized by its hexagonal head and flanged design. The hexagonal head allows for efficient torque application using standard tools, while the flange provides additional surface area to distribute load and prevent the screw from sinking into softer materials. Commonly made from materials such as alloy steel or stainless steel, these screws are designed to withstand significant stress and corrosion. In fastening applications, the screw threads into a pre-drilled hole, creating a secure connection between components ³.

Role in Truck Operation

In the context of a commercial truck, the 3900632 Hexagon Flange Head Cap Screw plays a vital role in securing various components. It is often used in applications where vibration resistance and a strong, permanent fastening are required. This screw can be found in engine assemblies, transmission systems, and chassis components, where it helps maintain the integrity of critical connections. By securing these parts, the screw contributes to the safe and efficient operation of the truck ¹.

Key Features

The 3900632 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance and reliability. Its hexagonal head design allows for easy installation and removal using common tools. The flange provides additional bearing surface, which helps distribute the load and reduces the risk of the screw pulling through the material. Additionally, this screw may feature special coatings or treatments, such as zinc plating or black oxide finishing, to improve corrosion resistance and durability in harsh environments ².

Benefits

The advantages of using the 3900632 Hexagon Flange Head Cap Screw include enhanced fastening security, resistance to vibration loosening, and durability in demanding conditions. The design of the screw, combined with high-quality materials, ensures a strong and reliable connection between components. Its resistance to vibration makes it suitable for use in dynamic environments, such as those found in commercial trucks. Furthermore, the screw’s durability ensures long-term performance, even in harsh operating conditions.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws may include corrosion, stripping of the head, or loosening due to vibration. To troubleshoot these problems, regular inspections should be conducted to identify any signs of wear or damage. Maintenance practices such as applying anti-seize compound to the threads can help prevent corrosion and facilitate easier removal in the future. Additionally, ensuring that the screw is properly torqued during installation can help prevent loosening and extend the lifespan of the fastener ³.

About Cummins

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 for quality and innovation in the commercial truck industry. The company offers a wide range of products, including engines, powertrains, and aftermarket parts, designed to meet the needs of various industries and applications. Cummins’ commitment to excellence and customer satisfaction has made it a trusted name in the automotive and heavy-duty truck sectors.

Cummins Engine Compatibility with Hexagon Flange Head Cap Screw Part 3900632

The Cummins part number 3900632, a Hexagon Flange Head Cap Screw, is designed to fit a variety of Cummins engines. This screw is integral in securing various components within the engine assembly, ensuring structural integrity and operational efficiency. Here’s how it fits with the specified engines:

15N Series

• 15N CM2380 M104B

4B Series

• 4B3.9
• 4B3.9 G

6B Series

• 6B5.9
• 6B5.9 G
• 6B5.9 GAS PLUS CM556

6C Series

• 6C8.3
• 6C8.3 G

B3.9 Series

• B3.9
• B3.9 G

B4.5 Series

• B4.5
• B4.5 CM2350 B129B
• B4.5 RGT

B5.6 Series

• B5.6 CM2670 B152B

B5.9 Series

• B5.9
• B5.9 CM2670 B166C
• B5.9 CM2670 B166C

B6.7 Series

• B6.7
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125
• B6.7S

D4.0 Series

• D4.0 CM2620 D103B

F2.8 Series

• F2.8 CM2620 F135B

F3.8 Series

• F3.8
• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102

F4.5 Series

• F4.5 CM2620 F139B

The Hexagon Flange Head Cap Screw part 3900632 is a versatile component that plays a critical role in the assembly and maintenance of these Cummins engines. Its design ensures a secure fit, providing the necessary strength and stability required for engine operation.

Role of Part 3900632 Hexagon Flange Head Cap Screw in Engine Systems

The part 3900632 Hexagon Flange Head Cap Screw is integral to securing various components within engine systems, ensuring stability and proper function.

Air Connection to Elbow Mounting

This screw is used to fasten the air connection to the elbow mounting, maintaining a secure and airtight connection which is essential for efficient airflow within the engine.

Engine Control Module (ECM)

In the assembly of the Engine Control Module, the Hexagon Flange Head Cap Screw ensures that the module is firmly attached to its mounting bracket, safeguarding against vibrations that could disrupt its operation.

Engine Control Wiring Harness

The screw plays a role in securing the Engine Control Wiring Harness in place, preventing any unwanted movement that could lead to wire fatigue or disconnection.

Exhaust Outlet Connection

At the Exhaust Outlet Connection, this screw is employed to ensure a tight seal, which is vital for the efficient expulsion of exhaust gases and reduction of emissions.

Expansion Tank

In the Expansion Tank setup, the screw helps in maintaining the integrity of the connection between the tank and the cooling system, which is important for managing engine temperature.

Front Cylinder Block Cover

The Front Cylinder Block Cover is secured using this screw, ensuring that the cover remains in place and provides necessary protection to the internal components of the engine.

Front Gear Cover

For the Front Gear Cover, the screw is essential in keeping the cover tightly sealed, which is important for preventing oil leaks and maintaining the lubrication system’s efficiency.

Fuel Control Valve

In the Fuel Control Valve assembly, the screw ensures that the valve is securely mounted, which is important for precise fuel delivery and engine performance.

Fuel Filter Location and Plumbing

At the Fuel Filter Location, the screw is used to secure the filter housing, while in Fuel Filter Plumbing, it ensures that connections are tight, preventing fuel leaks and ensuring consistent fuel pressure.

Fuel Plumbing

Throughout the Fuel Plumbing system, this screw is utilized to secure various connections, ensuring that the fuel lines remain intact and function without leaks.

Fuel Pump Coupling

The screw is integral in securing the Fuel Pump Coupling, ensuring that the pump is correctly aligned and operates efficiently.

Fuel Supply Plumbing

In Fuel Supply Plumbing, the screw is used to maintain secure connections, which is vital for consistent fuel supply to the engine.

Ignition System Arrangement

Within the Ignition System Arrangement, the screw secures components such as the ignition coil and spark plug wires, ensuring reliable ignition and engine start-up.

Injector Plumbing

For Injector Plumbing, the screw ensures that injectors are firmly mounted, which is essential for precise fuel injection and engine performance.

Intake Connection Mounting

The screw is used in Intake Connection Mounting to secure the intake manifold, ensuring a tight seal which is important for optimal air intake and engine efficiency.

Long Block

In the assembly of the Long Block, the screw is utilized to secure various components, ensuring structural integrity and proper function of the engine.

Lubricating Oil Cooler Module

The screw secures the Lubricating Oil Cooler Module, ensuring that it is correctly mounted and functions efficiently to maintain engine oil temperature.

Lubricating Oil Filter Head

At the Lubricating Oil Filter Head, the screw ensures that the filter is securely attached, which is important for effective oil filtration and engine lubrication.

Muffler

In the Muffler assembly, the screw is used to secure the muffler to the exhaust system, ensuring a tight fit which is important for reducing noise and managing exhaust flow.

Oil Pan Mounting

The screw is essential in Oil Pan Mounting, ensuring that the oil pan is securely attached to the engine, which is important for containing engine oil and preventing leaks.

Overhaul Kit

Within an Overhaul Kit, the screw is used to secure various components during engine rebuilds, ensuring that all parts are correctly mounted and function as intended.

Torque Converter Oil Cooler

The screw secures the Torque Converter Oil Cooler, ensuring that it is correctly mounted and functions efficiently to maintain the transmission fluid temperature.

Turbocharger Location

At the Turbocharger Location, the screw is used to secure the turbocharger to the engine, ensuring that it is correctly aligned and operates efficiently to boost engine performance.

Valve Cover

Finally, the screw is utilized in securing the Valve Cover, ensuring that it is tightly sealed, which is important for preventing oil leaks and maintaining the valve train’s lubrication.

Conclusion

The 3900632 Hexagon Flange Head Cap Screw by Cummins is a critical component in the assembly and maintenance of commercial truck engines. Its robust design, high-quality materials, and specialized features make it an essential fastener for securing various engine components. Regular maintenance and proper installation practices are crucial to ensure the longevity and reliability of this Cummins part, contributing to the overall performance and safety of commercial vehicles.