3909025
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3909025, is a component manufactured by Cummins. This screw is significant in the realm of commercial trucks due to its robust design and functionality. Cummins, a well-respected name in the automotive industry, ensures that this part meets high standards of quality and performance ¹.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and a flange beneath the head. The hexagonal head allows for efficient torque application using standard tools, while the flange provides additional surface area for distribution of load and prevents the screw from sinking into the material ². Within mechanical systems, these screws are used to secure components together, ensuring stability and integrity under various operational conditions.

Purpose and Role in Truck Operation

The 3909025 Hexagon Flange Head Cap Screw serves a specific purpose in truck mechanics. It is utilized in applications where secure fastening is required, such as joining metal components, securing brackets, or attaching panels. This screw supports various systems within the truck, including the engine, transmission, and chassis, by providing a reliable connection point that can withstand significant stress and vibration ³.

Key Features

The primary features of the 3909025 Hexagon Flange Head Cap Screw include its hexagonal head design, which facilitates easy and precise tightening. The flange beneath the head enhances the screw’s ability to distribute load and resist sinking. Additionally, the screw is crafted from high-quality materials, ensuring durability and resistance to corrosion. These features make it suitable for demanding applications in commercial trucks.

Benefits

Using the 3909025 Hexagon Flange Head Cap Screw offers several advantages. Its durable construction ensures long-term reliability, while its resistance to vibration minimizes the risk of loosening over time. The ease of installation, thanks to its hexagonal head, allows for quick and efficient fastening. Furthermore, the flange design enhances the screw’s performance by providing a larger contact area, which helps in distributing the load more effectively.

Installation Process

To install the 3909025 Hexagon Flange Head Cap Screw, begin by ensuring the mating surfaces are clean and free of debris. Use a torque wrench to apply the appropriate amount of torque specified by the manufacturer to avoid over-tightening or under-tightening. It is important to follow the recommended torque settings to ensure the screw is securely fastened without causing damage to the components or the screw itself. Common pitfalls to avoid include using improper tools that may damage the hexagonal head and not checking for proper alignment before tightening.

Troubleshooting and Maintenance

Identifying common issues with the 3909025 Hexagon Flange Head Cap Screw involves checking for signs of corrosion, loosening, or damage to the head or flange. Regular maintenance practices include inspecting the screw for any wear or damage and ensuring it remains tight. If corrosion is detected, cleaning the affected area and applying a suitable anti-corrosive treatment can help. Replacement should be considered if the screw shows significant wear or if it fails to maintain a secure connection.

Manufacturer - Cummins

Cummins is a renowned manufacturer in the automotive industry, known for its commitment to quality and innovation. The company has a long-standing reputation for producing reliable and high-performance components. Cummins’ dedication to excellence is evident in their rigorous testing and quality control processes, ensuring that each part, including the 3909025 Hexagon Flange Head Cap Screw, meets the highest standards of durability and functionality.

Hexagon Flange Head Cap Screw 3909025 in Cummins Engines

The Cummins part number 3909025, a Hexagon Flange Head Cap Screw, is a critical component in several Cummins engine models. This screw is designed to secure various parts within the engine, ensuring structural integrity and operational efficiency. Here’s how it fits into different Cummins engines:

4B3.9, 6B5.9, 6C8.3, B3.3, B5.9 GAS PLUS CM556

In these engines, the 3909025 screw is often used to fasten components that require a robust connection, such as securing the cylinder head to the engine block. Its flange head design provides a large bearing surface, distributing the load evenly and preventing damage to the mating parts.

ISB/ISD4.5 CM2150 B119, ISB/ISD6.7 CM2150 SN, ISB4.5 CM2350 B104, ISB5.9 CM2880 B149, ISB5.9G CM2180

These engines utilize the 3909025 screw in various applications, including securing the turbocharger housing and other critical components. The screw’s design ensures that these parts remain tightly fastened under high-stress conditions, contributing to the engine’s overall reliability and performance.

ISBE CM2150, ISBE CM800, ISBE4 CM850

In these models, the 3909025 screw is often found in applications where precise alignment and secure fastening are essential. This includes securing components related to the engine’s fuel injection system and other critical assemblies.

ISC CM2150, ISC CM554, ISC CM850, ISC8.3 CM2250

The 3909025 screw is used in these engines to fasten parts that require a strong and reliable connection. This includes securing the engine’s intake manifold and other components that are subject to high thermal and mechanical stresses.

ISF3.8 CM2220 AN

In this engine, the 3909025 screw is utilized to fasten components that need a secure and durable connection. Its design ensures that these parts remain tightly fastened, even under extreme operating conditions.

ISL CM2150, ISL CM554, ISL G CM2180, ISL9 CM2150 SN, ISL9 CM2250, ISL9.5 CM2880 L138

These engines use the 3909025 screw in various applications, including securing the engine’s exhaust system and other critical components. The screw’s flange head design provides a large bearing surface, distributing the load evenly and preventing damage to the mating parts.

ISM CM570/870

In this engine, the 3909025 screw is used to fasten components that require a robust and reliable connection. This includes securing parts related to the engine’s cooling system and other critical assemblies.

Role of Part 3909025 Hexagon Flange Head Cap Screw in Engine Systems

The part 3909025 Hexagon Flange Head Cap Screw is integral in securing and maintaining the structural integrity of various engine components. Its robust design ensures reliable fastening in high-stress environments.

Alternator Mounting

This screw is utilized in the alternator mounting arrangement to secure the alternator firmly to the engine block. This ensures stable operation and prevents vibrations that could lead to electrical issues.

Heat Shield Arrangement

In the heat shield arrangement, the screw helps in attaching the heat shield to the engine components, providing thermal protection to nearby parts and wiring.

Turbocharger

For turbocharger applications, the screw is employed to fasten the turbocharger to the engine block or exhaust manifold. This secure attachment is vital for the turbocharger’s efficient operation and durability.

Block Kit

Within block kits, the screw is used to assemble various components, ensuring that the block remains intact and functions as designed.

Cooler and Engine Oil System

In the engine oil system, particularly in the oil cooler and related plumbing, the screw secures fittings and connections, maintaining the integrity of the oil flow and cooling system.

Front Gear and Valve Covers

The screw is also crucial in attaching front gear and valve covers, ensuring these covers remain sealed and do not leak oil or allow contaminants into the engine.

Cylinder Block and Filter

In the cylinder block, the screw is used to secure various components and covers. Additionally, in the full flow oil filter system, it ensures the filter housing is tightly sealed, promoting efficient oil filtration.

Fuel System Components

For fuel drain plumbing, fuel injection pump, and fuel pump mounting, the screw provides the necessary fastening to ensure these components are securely attached and operate without leaks.

Electronic Control Module Wiring and Thermostat Housing

The screw is employed in securing the harness for electronic control module wiring and in thermostat housing, ensuring these critical systems function correctly and remain protected.

Refrigerant Compressor and Oil Pan

In refrigerant compressor mounting and oil pan assembly, the screw ensures these components are securely fastened, contributing to the overall stability and performance of the engine.

Corrosion Resistor and Spacer

The screw acts as a corrosion resistor in various applications, and when used as a spacer, it helps in maintaining proper alignment and spacing between components.

Fan Pilot and XPI JV System Cummins MR

In the fan pilot system and the XPI JV System for Cummins MR engines, the screw ensures that all components are securely fastened, contributing to the efficient operation of these systems.

Conclusion

The 3909025 Hexagon Flange Head Cap Screw is a vital component in the automotive industry, particularly in commercial trucks and Cummins engines. Its robust design, ease of installation, and resistance to corrosion make it an ideal choice for securing various engine components. Proper installation and maintenance of this screw ensure the longevity and reliability of the engine systems it supports.