3863343
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3863343, is a component manufactured by Cummins, a well-established name in the commercial truck industry. This screw is significant in the realm of commercial truck maintenance due to its robust design and reliable performance. Cummins, known for its high-quality engine and powertrain components, ensures that this screw meets the stringent demands of heavy-duty applications ¹.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by a hexagonal head, a flange beneath the head, and a threaded shank. In the automotive industry, these screws are commonly used for their ability to provide secure fastening while distributing clamping force effectively. In commercial trucks, they are often employed to secure various components, ensuring both stability and durability under demanding conditions ².

Purpose and Function

The 3863343 Hexagon Flange Head Cap Screw plays a role in the operation of a truck by securing critical components and contributing to the structural integrity of the vehicle. It is designed to withstand significant stress and vibration, which are common in heavy-duty truck applications. By providing a secure fastening solution, this screw helps maintain the alignment and functionality of various truck parts ³.

Key Features

The design of the 3863343 Hexagon Flange Head Cap Screw incorporates several key features that enhance its performance. The hexagonal head allows for easy access with standard wrenches, facilitating both installation and removal. The flange under the head serves to distribute the clamping force more evenly across the fastened surface, reducing the risk of damage to the material being secured. The cap screw design ensures a tight and secure fit, which is crucial for maintaining the integrity of truck components.

Benefits

Using the 3863343 Hexagon Flange Head Cap Screw offers several advantages. Its robust construction enhances durability, making it suitable for long-term use in demanding environments. The design resists loosening over time, even under significant vibration, which is a common issue in commercial trucks. Additionally, the screw is easy to install and remove, allowing for efficient maintenance and repair processes.

Installation and Usage

Proper installation of the Hexagon Flange Head Cap Screw is vital to ensure its effectiveness. It is recommended to follow torque specifications provided by the manufacturer to achieve the correct clamping force without over-tightening, which could lead to damage. Using the appropriate tools and techniques will help secure the screw properly, ensuring a reliable connection between components.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws include corrosion and stripping. Regular inspection and maintenance can help identify these problems early. If corrosion is detected, cleaning the affected area and applying a suitable corrosion-resistant coating can prolong the screw’s lifespan. In cases of stripping, replacing the screw is typically the best course of action to maintain structural integrity.

Cummins: Manufacturer Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing reliable and high-performance components. Their product range includes engines, powertrains, and aftermarket parts, all designed to meet the rigorous demands of heavy-duty applications.

Cummins Hexagon Flange Head Cap Screw 3863343 Compatibility with Engine Models

The Cummins Hexagon Flange Head Cap Screw part number 3863343 is designed to be compatible with a variety of Cummins engine models. This part is integral in securing various engine components, ensuring stability and reliability during operation. Below is a detailed look at the compatibility of this screw with specific engine models:

Small Bore Engines

• 4B3.9
• 6B5.9
• B3.3
• QSB3.3 CM2150
• QSB3.3 CM2250 EC

These engines, categorized as small bore, often require precise fastening solutions to maintain engine integrity. The 3863343 screw fits seamlessly into these models, providing the necessary strength and durability.

Medium Bore Engines

• 6C8.3
• QSF2.8 CM2880 F105
• QSF2.8 CM2880 F114

Medium bore engines such as the 6C8.3 and QSF2.8 series benefit from the robust design of the 3863343 screw. This part is engineered to withstand the operational stresses these engines endure, ensuring long-lasting performance.

Large Bore Engines

• X15 CM2350 X116B
• X15 CM2450 X134B

For large bore engines, the 3863343 screw is a critical component in maintaining the structural integrity of the engine. These engines demand high-quality fasteners that can handle significant loads and pressures, and the 3863343 screw meets these requirements effectively.

Each of these engines, regardless of their bore size, relies on the 3863343 screw for critical fastening applications. This part’s compatibility across such a diverse range of engine models underscores its versatility and importance in the Cummins engine ecosystem.

Role of Part 3863343 Hexagon Flange Head Cap Screw in Engine Systems

The 3863343 Hexagon Flange Head Cap Screw is instrumental in securing various components within engine systems, ensuring stability and proper function. Its applications span across multiple critical areas:

• Alternator Mounting: This screw is used to firmly attach the alternator to the engine block, ensuring it remains in place while withstanding vibrations and operational stresses.

• Compressor Air Inlet Arrangement: It secures the compressor to the air inlet system, maintaining alignment and sealing to optimize airflow and compressor efficiency.

• Crankcase and Breather System: The screw plays a role in mounting components of the crankcase and breather system, ensuring that ventilation and pressure relief functions are maintained without leaks.

• Corrosion Resistor Mounting: It is employed to attach corrosion resistors, which are vital for protecting metal components from environmental degradation.

• Fan and Flywheel Assembly: The screw is utilized in the mounting of the fan and the flywheel and ring gear, ensuring these rotating components are securely fastened and balanced.

• Harness and Electronic Control Module Wiring: It aids in the secure attachment of wiring harnesses and the electronic control module, maintaining electrical integrity and safety.

• Lubricating Oil Pump and Plumbing: This screw is involved in mounting the lubricating oil pump and securing plumbing connections for exhaust recirculation air, fuel filter, and sensor lines, ensuring fluid dynamics and pressure are maintained.

• Mounting of Engine Control Module and Fan Drive: It is critical in the secure attachment of the engine control module and the fan drive, ensuring these components operate efficiently and reliably.

• Intake Connection and Oil Pan: The screw is used to mount the intake connection and secure the oil pan, maintaining the structural integrity and sealing of these components.

• Spacer and Fan Pilot: It is also used in the installation of spacers and the fan pilot, ensuring proper spacing and alignment of components for optimal engine performance.

Conclusion

The 3863343 Hexagon Flange Head Cap Screw is a vital component in the maintenance and operation of Cummins engines. Its robust design, ease of installation, and compatibility with a wide range of engine models make it an indispensable part in ensuring the stability and reliability of commercial truck engines. Regular maintenance and proper installation are key to maximizing the lifespan and effectiveness of this screw.