3896408
Hexagon Flange Head Cap Screw
Cummins®

This article provides an overview of the Hexagon Flange Head Cap Screw, part number 3896408, manufactured by Cummins. It covers the basic concepts, purpose, key features, benefits, and maintenance suggestions for this component, which is used in commercial trucks.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by a hexagonal head and a flanged base. The hexagonal head allows for easy tightening and loosening using a wrench, while the flange provides additional surface area to distribute the load and prevent the screw from sinking into the material ¹.

Purpose and Function

The 3896408 Hexagon Flange Head Cap Screw by Cummins is designed to secure various components within a commercial truck. It plays a role in joining parts that require a strong, permanent fastening solution. This screw is commonly used in applications where vibration resistance and load distribution are important ².

Key Features

• Hexagonal head for easy tool engagement
• Flanged base to distribute load and prevent sinking
• High-strength material for durability
• Corrosion-resistant coating for extended lifespan in harsh environments
• Designed to meet or exceed industry standards for commercial truck applications ³

Benefits

• Provides a strong and secure fastening solution
• Offers excellent resistance to vibration, which is common in truck operations
• Enhances the durability and reliability of truck components
• Reduces the risk of fastener failure and component detachment
• Easy to install and remove with standard tools

Troubleshooting and Maintenance

• Regularly inspect the screw for signs of corrosion, wear, or damage.
• Ensure the screw is properly tightened to the manufacturer’s specifications to maintain a secure connection.
• Replace the screw if it shows significant wear or if the flange is damaged, to prevent failure.
• Use appropriate tools to avoid damaging the hexagonal head during installation or removal.
• Apply a thread locker if specified by the manufacturer to enhance vibration resistance.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. The company is known for its commitment to quality, innovation, and customer satisfaction, providing reliable components for various industries, including commercial trucking.

Compatibility with Cummins Engines

The Hexagon Flange Head Cap Screw part number 3896408, manufactured by Cummins, is a versatile component that can be utilized across a variety of Cummins engines. This screw is designed to provide a secure fastening solution, ensuring that parts remain tightly secured under operational conditions.

ISB Series Engines

The ISB series engines, known for their robust performance and reliability, include:

• ISB CM2150
• ISB CM850
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118

These engines benefit from the use of the 3896408 screw in various applications, such as securing engine covers, brackets, and other critical components.

ISC Series Engines

The ISC series engines, recognized for their high-torque output and efficiency, include:

• ISC CM2150
• ISC CM850
• ISC8.3 CM2250

The 3896408 screw is ideal for these engines, providing the necessary strength and durability to maintain secure fastenings in demanding environments.

ISL Series Engines

The ISL series engines, designed for heavy-duty applications, include:

• ISL CM2150
• ISL G CM2180
• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

These engines utilize the 3896408 screw in numerous applications, ensuring that all parts are firmly attached and operational integrity is maintained.

ISBE Series Engines

The ISBE series engines, known for their balance of power and fuel efficiency, include:

• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

The 3896408 screw is compatible with these engines, providing reliable fastening for various engine components.

ISM Series Engines

The ISM series engines, designed for medium-duty applications, include:

• ISM CM570
• ISM CM570/870

These engines also benefit from the use of the 3896408 screw, ensuring secure fastenings in all relevant applications.

ISG Series Engines

The ISG series engines, known for their high-performance capabilities, include:

• ISG11 CM2880 G108
• ISG12 CM2880 G107
• ISG12 G CMOH6.0 G111

The 3896408 screw is suitable for these engines, providing the necessary strength and reliability for securing various engine parts.

By ensuring compatibility with a wide range of Cummins engines, the 3896408 Hexagon Flange Head Cap Screw is a crucial component for maintaining the integrity and performance of these engines.

Role of Part 3896408 Hexagon Flange Head Cap Screw in Engine Systems

In the intricate assembly of engine systems, the part 3896408 Hexagon Flange Head Cap Screw serves as a vital fastening component, ensuring the secure attachment of various elements. This screw is integral in maintaining the structural integrity and operational efficiency of the engine.

Aftercooler and Turbocharger Arrangements

Within the aftercooler and turbocharger arrangements, the Hexagon Flange Head Cap Screw is employed to fasten critical components. It secures the aftercooler to the engine block, ensuring efficient cooling of the compressed air before it enters the engine cylinders. Similarly, in the turbocharger arrangement, this screw plays a role in attaching the turbocharger to the engine, facilitating the smooth operation of the turbocharging process.

Crankcase Breather and Belt Systems

The crankcase breather system relies on the Hexagon Flange Head Cap Screw to maintain a sealed environment, preventing oil vapors and contaminants from escaping. In belt systems, including the fan drive and belt tensioner kit, this screw ensures that belts are properly tensioned and aligned, contributing to the efficient transfer of power from the engine to auxiliary components like the alternator and water pump.

Cylinder Block and Water Inlet Connection

In the cylinder block, the Hexagon Flange Head Cap Screw is used to secure various components, including the water inlet connection. This ensures a reliable flow of coolant into the engine, vital for maintaining optimal operating temperatures. The screw also plays a role in attaching the thermostat housing, regulating the flow of coolant based on engine temperature.

Drive Systems and Auxiliary Components

For drive systems such as the alternator, auxiliary pump, and water pump, the Hexagon Flange Head Cap Screw is essential in securing these components to the engine. This ensures stable operation and efficient power generation or fluid circulation as required. Additionally, in the engine stand mounting kit and fan support, this screw contributes to the overall stability and cooling efficiency of the engine setup.

Fuel System and Cooling Modules

In the fuel system, including the fuel filter, fuel pump, and fuel control module, the Hexagon Flange Head Cap Screw ensures secure attachment of components, facilitating reliable fuel delivery. Within the cooling system, it is used in the plumbing of the charge air bypass and fuel supply, as well as in the auxiliary cooling system, to maintain efficient operation and prevent leaks.

Upper Engine Gasket Kit

Finally, in the upper engine gasket kit, the Hexagon Flange Head Cap Screw is utilized to secure gaskets and seals, ensuring a tight fit and preventing leaks between engine components. This contributes to the overall sealing integrity of the engine, crucial for its performance and longevity.

Through its application in these diverse engine components, the Hexagon Flange Head Cap Screw demonstrates its versatility and importance in engine assembly and maintenance.

Conclusion

The 3896408 Hexagon Flange Head Cap Screw is a critical component in the assembly and maintenance of Cummins engines. Its robust design, compatibility with various engine series, and versatile applications make it indispensable for ensuring the structural integrity and operational efficiency of commercial trucks. Regular maintenance and proper use of this screw are essential for the longevity and reliability of engine systems.