3916518
Hexagon Flange Head Cap Screw
Cummins®

The Cummins Hexagon Flange Head Cap Screw, identified by part number 3916518, is a critical component in the assembly and maintenance of commercial trucks, especially heavy-duty vehicles. This part is designed to offer secure and reliable fastening for various truck components, ensuring the vehicle’s structural integrity and functionality.

Basic Concepts

A Hexagon Flange Head Cap Screw is a fastener characterized by its hexagonal head and flange. The hexagonal head facilitates easy tightening and loosening with a wrench, while the flange provides a larger bearing surface that evenly distributes the load across the fastened material. Typically made from steel or stainless steel, these screws are chosen for their strength and durability. The design of this Cummins part allows it to effectively secure components together, withstanding significant stress and vibration ¹.

Purpose and Function

The 3916518 Hexagon Flange Head Cap Screw is essential for the assembly and maintenance of truck components. It ensures parts are securely fastened, which is crucial for the safe operation of heavy-duty trucks. This screw contributes to the structural integrity of the truck by providing a reliable fastening solution that can endure the rigors of commercial use. Its design allows for efficient assembly and disassembly, facilitating maintenance and repair processes ².

Key Features

The 3916518 features a hexagonal head that offers accessibility for wrenches, making installation and removal straightforward. The flange provides an increased bearing surface, which helps to prevent the screw from sinking into the material being fastened. Additionally, the cap screw design allows for the use of a nut if required, offering versatility in application. The screw’s thread pitch is designed to ensure a secure fit, and it may include special coatings or treatments to enhance corrosion resistance, ensuring durability in harsh environments ³.

Benefits

The 3916518 offers several benefits, including improved fastening security due to its design and material properties. The ease of installation and removal is enhanced by the hexagonal head, while the flange contributes to resistance against vibration loosening. Furthermore, the screw’s durability is ensured through the use of high-quality materials and corrosion-resistant coatings, making it suitable for the demanding conditions encountered in commercial truck operations.

Troubleshooting and Maintenance

Common issues with the 3916518, such as loosening or corrosion, can often be addressed through proper maintenance practices. Regular inspections and torque checks are recommended to ensure the screw remains securely fastened and functions as intended. Should corrosion be detected, cleaning and reapplying a corrosion-resistant coating may be necessary. Additionally, ensuring that the screw is correctly torqued during installation can prevent loosening over time.

About Cummins

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 itself as an expert in diesel engines and related technologies. The company is committed to quality and innovation, providing reliable and efficient solutions for the commercial vehicle industry. Cummins’ expertise in engine and component manufacturing ensures that their products, including the 3916518, meet the high standards required for heavy-duty applications.

Cummins Engines Utilizing the 3916518

The Cummins Hexagon Flange Head Cap Screw part number 3916518 is a versatile component utilized across a variety of Cummins engine models. This screw is designed to provide secure fastening in applications where a strong, reliable connection is essential. Below is a detailed overview of the engines where this part is applicable, grouped by engine series for clarity.

Cummins B Series Engines

• B3.3
• B4.5
• B5.6
• B5.9
• B5.9 G
• B5.9 GAS PLUS CM556

Cummins C Series Engines

• C GAS PLUS CM556

Cummins 4 Series Engines

• 4B3.9

Cummins 6 Series Engines

• 6B5.9
• 6C8.3

Cummins G Series Engines

• G5.9
• G5.9 CM558
• G8.3
• G8.3 CM558
• G8.3 G

Cummins ISB and ISD Series Engines

• ISB CM550
• ISB/ISD4.5 CM2150 B119
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B140
• ISB5.9 CM2880 B149
• ISB5.9G CM2180

Cummins ISBE and ISC Series Engines

• ISBE CM800
• ISC CM2150
• ISC CM554
• ISC CM850

The 3916518 is integral to maintaining the structural integrity of these engines, ensuring that various components are securely fastened and aligned. Its application across such a diverse range of engine models underscores its importance in the Cummins engine ecosystem.

Role of Part 3916518 in Engine Systems

The 3916518 is integral in securing various components within engine systems, ensuring stability and proper function.

Aftercooler

In the aftercooler system, this screw is used to fasten the aftercooler to its mounting brackets. This secure attachment is essential for maintaining the structural integrity and alignment of the aftercooler, which is vital for efficient cooling of compressed air.

Alternator and Its Mounting

For the alternator, the Hexagon Flange Head Cap Screw is employed in securing the alternator to its designated location on the engine. This ensures that the alternator remains firmly in place, allowing it to function without vibration or movement that could affect its performance.

Turbocharger Arrangement and Location

Within the turbocharger system, these screws are utilized to attach the turbocharger to its mounting points. This secure fitting is necessary for the turbocharger to operate efficiently, as any movement could lead to decreased performance or damage.

Compressor and Refrigerant System

In the refrigerant compressor assembly, the screw is used to fasten components such as the compressor cover and cam follower. This secure attachment ensures that the compressor operates smoothly, without any parts shifting or becoming misaligned.

Engine Cooling System

The Hexagon Flange Head Cap Screw plays a role in the engine cooling system by securing the water inlet and radiator components. This ensures a tight seal and proper alignment, which is essential for efficient coolant flow and engine temperature regulation.

Exhaust Manifold and Fuel System

For the exhaust manifold and fuel filter location, these screws are used to mount these components securely. This is important for maintaining the integrity of the exhaust system and ensuring that the fuel filter remains in the correct position for optimal fuel flow.

Wiring Harness and Brace Assembly

In the wiring harness and brace assembly, the screw is used to secure wiring connections and braces. This ensures that electrical connections remain intact and that the wiring harness is protected from damage.

Oil Pan and Mounting Points

The screw is also utilized in securing the oil pan to its mounting points. This is crucial for maintaining the structural integrity of the oil pan and ensuring that it remains sealed to prevent oil leaks.

Fan and Its Components

For the fan and its associated components such as the fan pilot and spacer, the Hexagon Flange Head Cap Screw is used to ensure these parts are securely attached. This is important for the efficient operation of the fan and for maintaining proper airflow within the engine compartment.

Engine Control and Fuel Control Modules

In the engine control module (ECM) and fuel control module (FCM), these screws are used to secure the modules to their mounting points. This ensures that the modules remain in place and operate without interference from vibrations or movement.

Conclusion

Overall, the 3916518 Hexagon Flange Head Cap Screw is a versatile fastener that plays a significant role in the secure attachment and efficient operation of various engine system components. Its design, material properties, and application across a wide range of Cummins engines highlight its importance in maintaining the structural integrity and functionality of heavy-duty vehicles.