3406888
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3406888, is a component manufactured by Cummins, a well-established name in the automotive and heavy-duty truck industry. This screw is significant in commercial trucks due to its role in fastening various components securely, ensuring the integrity and reliability of the vehicle’s structure and systems.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and a flange—a flat, circular plate—attached to the underside of the head. This design allows for efficient torque application and provides a larger bearing surface, which helps distribute the load more evenly. Within a fastening system, this screw serves to join two or more components together securely, resisting both tensile and shear forces.

Purpose and Role in Truck Operation

The 3406888 Hexagon Flange Head Cap Screw plays a specific role in the operation and maintenance of commercial trucks by securing critical components. Its design ensures that parts remain firmly attached under various operational stresses, contributing to the overall stability and safety of the truck. This screw is often used in applications where vibration and dynamic loads are common, making its secure fastening capabilities particularly valuable.

Key Features

The 3406888 Hexagon Flange Head Cap Screw boasts several key features that enhance its functionality. The hexagonal head allows for easy and precise tightening using standard tools, reducing the risk of cam-out. The flange provides additional surface area, which helps in distributing the clamping force more effectively and preventing the screw from pulling through the material. Additionally, the screw is typically made from high-strength materials, ensuring durability and resistance to corrosion, which is vital in the often harsh environments commercial trucks operate in.

Benefits

Using the 3406888 Hexagon Flange Head Cap Screw offers several benefits. Its design enhances fastening security, making it less likely for the screw to loosen over time compared to standard cap screws. The flange also provides added stability, which is particularly beneficial in applications subjected to vibration. Furthermore, the material properties of the screw contribute to its durability, ensuring long-term performance even under demanding conditions.

Installation Guidelines

To ensure optimal performance and longevity, proper installation of the 3406888 Hexagon Flange Head Cap Screw is crucial. Begin by ensuring the mating surfaces are clean and free of debris. Use a torque wrench to tighten the screw to the manufacturer’s specified torque settings to avoid over-tightening, which can lead to stripping, or under-tightening, which can result in insufficient clamping force. It is also advisable to apply a thread locker to the screw threads to prevent loosening due to vibration.

Troubleshooting Common Issues

Common issues with the 3406888 Hexagon Flange Head Cap Screw may include loosening, corrosion, or damage to the flange. If loosening is detected, re-tighten the screw to the specified torque and consider applying a thread locker. Corrosion can be addressed by replacing the screw and ensuring that all mating surfaces are protected with an appropriate coating. Damage to the flange may require replacement of the screw to maintain the integrity of the fastening system.

Maintenance Tips

Regular maintenance of the 3406888 Hexagon Flange Head Cap Screw is recommended to prevent issues and ensure continued reliable performance. Inspect the screw periodically for signs of loosening, corrosion, or damage. Clean the mating surfaces as needed and reapply protective coatings if necessary. Additionally, ensure that all tools used for installation and maintenance are in good condition to avoid damaging the screw or the components it secures.

Cummins Overview

Cummins is a renowned manufacturer with a long-standing reputation for producing high-quality automotive components. Founded in 1919, the company has a history of innovation and commitment to quality, which is reflected in its wide range of products, including the 3406888 Hexagon Flange Head Cap Screw. Cummins’ dedication to excellence ensures that their components meet the rigorous demands of commercial truck applications.

Hexagon Flange Head Cap Screw (Part 3406888) in Cummins Engines

The Hexagon Flange Head Cap Screw, part number 3406888, is a critical component used in various Cummins engines. This screw is designed to provide a secure fastening solution, ensuring that parts remain tightly connected under operational stresses. Here is how this part fits into the different Cummins engines:

ISM Series Engines

• ISM CM570
• ISM CM570/870
• ISM CM876
• ISM11 CM876 SN

The ISM series engines, including the ISM CM570, ISM CM570/870, ISM CM876, and ISM11 CM876 SN, utilize the Hexagon Flange Head Cap Screw in several key areas. These engines, known for their robust performance, require reliable fastening solutions to maintain structural integrity and operational efficiency. The screw is often used in applications where a secure and stable connection is essential, such as attaching components to engine blocks or other critical assemblies.

L10 Series Engines

• L10 CELECT
• L10 GAS
• L10 MECHANICAL

The L10 series engines, including the L10 CELECT, L10 GAS, and L10 MECHANICAL, also incorporate the Hexagon Flange Head Cap Screw in various configurations. These engines are designed for different applications, from marine to industrial use, and the screw plays a vital role in ensuring that all parts are securely fastened. The screw’s design allows for easy installation and removal, which is crucial for maintenance and repair operations.

M11 Series Engines

• M11 CELECT
• M11 CELECT PLUS
• M11 MECHANICAL

The M11 series engines, including the M11 CELECT, M11 CELECT PLUS, and M11 MECHANICAL, are another set of engines that benefit from the use of the Hexagon Flange Head Cap Screw. These engines are known for their versatility and performance, and the screw is used in various applications to ensure that components remain securely fastened. The screw’s flange head provides a larger surface area for torque application, enhancing the fastening process.

QSM11 Series Engines

• QSM11 CM570
• QSM11 CM876

The QSM11 series engines, including the QSM11 CM570 and QSM11 CM876, also utilize the Hexagon Flange Head Cap Screw. These engines are designed for specific applications, and the screw is used in areas where a strong and reliable fastening solution is required. The screw’s design ensures that the components remain securely attached, even under high operational stresses.

Hexagon Flange Head Cap Screw (Part 3406888) in Engine Systems

The Hexagon Flange Head Cap Screw, identified by part number 3406888, is an essential fastening component utilized across various engine systems to ensure secure and reliable connections. Its application spans multiple critical components, contributing to the overall integrity and performance of the engine.

Aftercooler

In the aftercooler system, the Hexagon Flange Head Cap Screw is employed to fasten the aftercooler to its mounting brackets. This secure attachment is vital for maintaining the structural stability of the aftercooler, which is responsible for cooling the compressed air from the turbocharger before it enters the engine’s combustion chambers. Proper fastening ensures that the aftercooler remains firmly in place, even under the dynamic conditions of engine operation.

Engine Oil Cooler

Within the engine oil cooler assembly, these screws are used to attach the cooler to the engine block or other supporting structures. The engine oil cooler plays a significant role in regulating the temperature of the engine oil, ensuring it operates within optimal ranges. Secure fastening with the Hexagon Flange Head Cap Screw prevents any potential misalignment or movement that could impair the cooler’s efficiency or cause leaks.

Oil Filter Cooler Head

The oil filter cooler head, which is part of the oil filtration system, also benefits from the use of the Hexagon Flange Head Cap Screw. This component is responsible for cooling the oil before it passes through the filter, enhancing the filtration process. The screw ensures that the cooler head is tightly secured, preventing any oil leaks and maintaining the system’s pressure integrity.

Scavenge Pump

In the scavenge pump system, the Hexagon Flange Head Cap Screw is used to attach the pump to its housing. The scavenge pump is essential for removing residual oil and contaminants from the engine sump, ensuring clean oil is circulated throughout the engine. Secure fastening is necessary to prevent any vibration-induced loosening, which could lead to pump failure or oil contamination.

Vibration Damper

Lastly, the vibration damper, which is designed to reduce engine vibrations and smooth out the power delivery, utilizes the Hexagon Flange Head Cap Screw for its attachment to the engine or other components. This secure connection is crucial for the damper to effectively absorb and dissipate vibrations, contributing to a smoother engine operation and reduced wear on engine components.

Conclusion

The Hexagon Flange Head Cap Screw (part number 3406888) plays a significant role in maintaining the structural integrity and operational efficiency of various engine systems. Its reliable fastening capabilities are instrumental in ensuring that these components perform their functions effectively, contributing to the engine’s overall performance and longevity.

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