3903464
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3903464, is a component manufactured by Cummins. This screw is significant in the realm of commercial truck maintenance due to its robust design and reliable performance. Cummins, a well-established name in the industry, ensures that this part meets the high standards required for heavy-duty applications ¹.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and a flange that sits against the surface being fastened. This design allows for secure and stable connections, making it ideal for various fastening applications. The hexagonal head provides a larger surface area for torque application, facilitating easier and more efficient tightening and loosening. The flange serves to distribute the load more evenly across the surface, reducing the risk of damage to the material being fastened ².

Role in Truck Operation

This Cummins part plays a role in the operation and maintenance of commercial trucks by securing critical components and assemblies. It is commonly used in applications where vibration resistance and secure fastening are paramount. These applications include, but are not limited to, engine mounts, transmission housings, and chassis components. The screw’s design ensures that these parts remain firmly in place, contributing to the overall stability and performance of the truck ¹.

Key Features

The 3903464 boasts several key features that enhance its performance and durability. Its hexagonal flange head design allows for efficient torque application and provides a stable seating surface. The screw is typically made from high-strength materials such as alloy steel, which offers excellent resistance to corrosion and wear. Additionally, the screw may feature a zinc or black oxide coating to further protect against environmental factors and improve longevity ².

Benefits

The benefits of using the 3903464 include improved fastening security, resistance to vibration loosening, and ease of installation and removal. The flange head design ensures that the screw remains tightly secured, even in applications subject to significant vibration. This reduces the need for frequent re-tightening and maintenance. Furthermore, the hexagonal head allows for straightforward installation and removal using standard tools, enhancing efficiency in maintenance procedures ¹.

Troubleshooting and Maintenance

Common issues that may arise with Hexagon Flange Head Cap Screws include corrosion, stripping, and loosening due to vibration. To address these issues, regular inspection and maintenance are recommended. If corrosion is detected, the affected area should be cleaned, and a protective coating reapplied if necessary. Stripped screws should be replaced to ensure secure fastening. To mitigate loosening, using lock washers or thread-locking compounds can be effective. Additionally, ensuring that the screw is properly torqued to the manufacturer’s specifications will help maintain a secure connection ².

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Founded in 1919, Cummins has a long-standing reputation for quality, innovation, and reliability in the commercial truck industry. The company’s extensive product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of heavy-duty applications. Cummins’ commitment to quality is evident in their rigorous testing and quality control processes, ensuring that their products deliver reliable performance and durability ¹.

Cummins Engine Compatibility with Hexagon Flange Head Cap Screw Part 3903464

This part is designed to fit a variety of Cummins engines. This part is integral in securing various components within the engine assembly, ensuring stability and reliability. Below is a detailed breakdown of the engines that are compatible with this specific screw:

15N CM2380 M104B

This engine model is part of the 15N series, known for its robust performance and efficiency. The Hexagon Flange Head Cap Screw is used in securing critical engine components, ensuring the integrity of the assembly.

4B3.9, 6B5.9, 6C8.3, B3.9 G, B4.5 CM2350 B129B, B4.5 RGT, B5.6 CM2670 B152B, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556

These engines, ranging from 4B3.9 to B5.9 GAS PLUS CM556, are part of the broader Cummins lineup. The Hexagon Flange Head Cap Screw is essential in these engines for securing various parts, including but not limited to, cylinder heads, intake manifolds, and exhaust systems.

B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C, B6.7 G CMOH6.0 B125, B6.7S, C GAS PLUS CM556

The B6.7 series engines, including models like B6.7 CM2350 B135B and B6.7 CM2670 B164C, utilize the Hexagon Flange Head Cap Screw for securing critical engine components. This screw ensures that parts such as the cylinder heads and various engine mounts are firmly in place.

C8.3 G

This engine model benefits from the Hexagon Flange Head Cap Screw for securing components that require a robust and reliable fastening solution. The screw’s design ensures that parts remain securely fastened under various operating conditions.

D4.0 CM2620 D103B, F2.8 CM2620 F135B, F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F3.8 F102, F4.5 CM2620 F139B

These engines, including the D4.0 CM2620 D103B and F3.8 CM2350 F128C, use the Hexagon Flange Head Cap Screw for securing various components. This screw is crucial in maintaining the structural integrity of parts such as the engine block, intake manifolds, and exhaust systems.

Each of these engines relies on the Hexagon Flange Head Cap Screw to ensure that components are securely fastened, contributing to the overall performance and longevity of the engine ¹.

Role of Part 3903464 Hexagon Flange Head Cap Screw in Engine Systems

This part is instrumental in securing and maintaining the integrity of various components within engine systems. Its robust design ensures reliable fastening in high-stress environments.

Aftercooler

In aftercooler systems, the Hexagon Flange Head Cap Screw is used to secure the aftercooler to the engine block, ensuring efficient cooling of compressed air before it enters the engine.

Alternator Mounting

For alternator mounting, this screw plays a key role in attaching the alternator to the engine, providing a stable connection that ensures consistent power generation.

Belt and Fan Drive

In belt and fan drive assemblies, the screw is utilized to fasten components securely, allowing for smooth operation and efficient power transmission.

Block and Cylinder

Within the engine block and cylinder assembly, the screw is employed to secure various components, contributing to the structural integrity and alignment of the engine’s internal parts.

Camshaft

The Hexagon Flange Head Cap Screw is also vital in camshaft installations, where it ensures the camshaft is properly aligned and secured, facilitating precise valve timing.

Compressor (Air and Refrigerant)

In both air and refrigerant compressor systems, this screw is used to fasten compressor components, ensuring they remain securely in place during operation.

Connection and Exhaust Outlet

For exhaust outlet connections, the screw provides a reliable fastening solution, maintaining the seal and structural integrity of the exhaust system.

Cooler (Marine Gear Oil)

In marine gear oil coolers, the screw is used to secure the cooler to the engine, ensuring efficient heat dissipation from the gear oil.

Filter (Full Flow Oil)

For full flow oil filters, the screw is essential in attaching the filter housing to the engine, ensuring a secure and leak-free connection.

Fuel Pump

In fuel pump installations, the screw is used to fasten the pump to the engine, ensuring it remains stable and operates efficiently.

Location (Air Intake Connection)

At the air intake connection, the screw secures the intake components, ensuring a proper seal and efficient airflow into the engine.

Lubricating Oil Filter Head

The screw is utilized in lubricating oil filter head assemblies to ensure a secure attachment, maintaining the integrity of the oil filtration system.

Mounting (Engine Control Module and Lubricating Oil Filter)

For mounting the engine control module and lubricating oil filter, the screw provides a stable and secure connection, essential for the proper functioning of these components.

Mounting Heat Shield

In heat shield installations, the screw ensures the shield is properly attached, protecting nearby components from excessive heat.

Oil Adapter

The screw is used in oil adapter installations to secure the adapter to the engine, ensuring a reliable connection for oil flow.

Oil Pan Top Level Assembly Adapter

In oil pan top level assembly adapters, the screw ensures the adapter is securely fastened, maintaining the integrity of the oil pan system.

Plumbing (Fuel Drain and Intercooler Water)

For fuel drain and intercooler water plumbing, the screw provides a secure connection, ensuring efficient fluid flow and system integrity.

Pump (Auxiliary)

In auxiliary pump installations, the screw is used to secure the pump to the engine, ensuring stable and efficient operation.

Resistor (Corrosion)

For corrosion resistor installations, the screw ensures the resistor is properly attached, protecting the engine from corrosive elements.

Transmission

In transmission systems, the screw is used to secure various components, ensuring the transmission operates smoothly and efficiently.

Turbocharger (Arrangement and Location)

For turbocharger arrangements and locations, the screw is essential in securing the turbocharger to the engine, ensuring it operates within the optimal parameters ².

Conclusion

The 3903464 Hexagon Flange Head Cap Screw is a critical component in the maintenance and operation of commercial trucks and Cummins engines. Its robust design, reliable performance, and compatibility with a wide range of Cummins engines make it an indispensable part for securing critical components and assemblies. Regular maintenance and proper installation are essential to ensure the longevity and efficiency of this part in heavy-duty applications.

References