3818122
Hexagon Flange Head Cap Screw
Cummins®

This article provides an overview of the Hexagon Flange Head Cap Screw, part number 3818122, 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 flange below the head. The hexagonal head allows for easy tightening and loosening using a wrench or socket, 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 3818122 Hexagon Flange Head Cap Screw plays a role in securing various components within a commercial truck. It is designed to provide a strong and reliable connection, ensuring that parts remain firmly in place under operational stresses. This screw is commonly used in applications where vibration resistance and a flush surface finish are required ².

Key Features

• Hexagonal head for easy tool engagement
• Flange below the head to distribute load and prevent sinking
• High-strength material construction
• Zinc or other coatings for corrosion resistance
• Specified thread size and pitch for particular applications

Benefits

• Enhanced fastening security due to the flange design
• Improved resistance to loosening under vibration
• Durable construction suitable for heavy-duty applications
• Corrosion-resistant coatings extend service life in various environments ³

Troubleshooting and Maintenance

Regular inspection of the Hexagon Flange Head Cap Screw is recommended to ensure it remains tight and free of corrosion. If loosening is detected, the screw should be re-tightened to the manufacturer’s specified torque. In cases of significant corrosion or damage, replacement of the screw may be necessary to maintain the integrity of the fastened components.

Cummins Engine Compatibility with Part 3818122

The Hexagon Flange Head Cap Screw, part number 3818122, manufactured by Cummins, is a versatile component that fits into various engine models. This screw is integral to the assembly and maintenance of several Cummins engines, ensuring secure fastening in critical applications.

ISM Series

• ISM CM570
• ISM11 CM876 SN

The ISM series engines, including the ISM CM570 and ISM11 CM876 SN, utilize the 3818122 screw in multiple locations throughout the engine assembly. This screw is often used in securing various engine components, ensuring that parts remain tightly fastened under operational stresses.

L10 Series

• L10 CELECT
• L10 GAS
• L10 MECHANICAL

The L10 series engines, such as the L10 CELECT, L10 GAS, and L10 MECHANICAL, also incorporate the 3818122 screw. This screw is essential in maintaining the structural integrity of the engine by securing components that are subject to high mechanical loads and vibrations.

M11 Series

• M11 CELECT
• M11 CELECT PLUS
• M11 MECHANICAL

In the M11 series engines, including the M11 CELECT, M11 CELECT PLUS, and M11 MECHANICAL, the 3818122 screw is used extensively. It plays a crucial role in fastening various parts of the engine, ensuring that the assembly remains stable and reliable under different operating conditions.

QSM11 Series

• QSM11 CM570

The QSM11 CM570 engine also relies on the 3818122 screw for its assembly. This screw is used in securing components that are critical to the engine’s operation, providing the necessary strength and durability required for high-performance applications.

The 3818122 Hexagon Flange Head Cap Screw is a critical component in the assembly and maintenance of these Cummins engines, ensuring that all parts are securely fastened and the engine operates efficiently and reliably.

Role of Part 3818122 Hexagon Flange Head Cap Screw in Engine Systems

The part 3818122 Hexagon Flange Head Cap Screw is integral in securing and maintaining the integrity of various engine components. Its robust design ensures a firm and reliable connection, which is essential for the efficient operation of the engine system.

Turbocharger Arrangement and Location

In turbocharger arrangements, the Hexagon Flange Head Cap Screw is used to secure the turbocharger to its designated location. This ensures that the turbocharger remains firmly in place, allowing it to effectively compress the intake air and enhance engine performance. The screw’s flange head provides additional surface area for a tighter grip, reducing the risk of loosening under high engine vibrations.

Exhaust Manifold and Exhaust Manifold Kit

When it comes to the exhaust manifold and exhaust manifold kit, the Hexagon Flange Head Cap Screw plays a significant role in mounting these components to the engine block. This secure attachment is vital for maintaining the structural integrity of the exhaust system, ensuring that exhaust gases are efficiently directed away from the engine. The screw’s design helps in withstanding the high temperatures and pressures associated with exhaust gases.

Alternator Mounting

The alternator, which is responsible for generating electrical power for the vehicle, requires a stable and secure mounting solution. The Hexagon Flange Head Cap Screw is employed to mount the alternator to the engine block or bracket. This ensures that the alternator remains in the correct position, allowing it to function efficiently without the risk of misalignment or detachment.

Drive and Power Turbine

In systems involving a drive and power turbine, the Hexagon Flange Head Cap Screw is used to secure various components within the turbine assembly. This includes attaching turbine blades, housing, and other critical parts. The screw’s strength and reliability are essential for maintaining the turbine’s structural integrity, ensuring smooth and efficient operation.

General Mounting Applications

Across various mounting applications within the engine system, the Hexagon Flange Head Cap Screw provides a versatile and dependable solution. Whether securing brackets, plates, or other components, its design ensures a strong and lasting connection. This is particularly important in high-stress areas where vibrations and thermal expansion can challenge the integrity of the mounting.

Conclusion

In summary, the part 3818122 Hexagon Flange Head Cap Screw is a fundamental component in ensuring the secure and efficient operation of various engine systems. Its application across different components highlights its versatility and importance in maintaining the overall performance and reliability of the engine.