3902451
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3902451 and manufactured by Cummins, is a specialized fastener designed for heavy-duty truck applications. Cummins, a well-established name in the automotive industry, produces this screw to meet the demanding requirements of truck maintenance and repair. This component is integral to ensuring the secure fastening of various truck components, contributing to the overall structural integrity and performance of heavy-duty vehicles.

Basic Concepts

Hexagon Flange Head Cap Screws are engineered with specific design principles to fulfill their role in fastening and securing components. The hexagonal head allows for efficient torque application using standard tools, ensuring that the screw can be tightened to the required specifications. The flange feature provides additional surface area, which helps distribute the load more evenly and prevents the screw from sinking into softer materials. These screws are typically made from high-strength materials to withstand the rigors of heavy-duty applications ¹.

Purpose and Role in Truck Operation

The 3902451 Hexagon Flange Head Cap Screw plays a significant role in heavy-duty truck operations by securing critical components. Its design ensures that parts remain firmly in place under various operating conditions, which is vital for the truck’s performance and safety. By maintaining the integrity of connections, this screw helps prevent component failure and ensures that the truck operates smoothly and reliably ².

Key Features

The 3902451 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance and reliability. Its hexagonal head design allows for easy and precise tightening using common tools. The flange feature provides additional bearing surface, which helps in distributing the load and reducing the risk of the screw head sinking into the material. Additionally, the screw is composed of high-strength materials, ensuring it can withstand the stresses and strains encountered in heavy-duty applications ³.

Benefits

The 3902451 Hexagon Flange Head Cap Screw offers several benefits that make it a preferred choice for heavy-duty truck applications. Its design provides enhanced fastening strength, ensuring that components remain securely attached. The flange feature contributes to resistance against loosening, even under dynamic conditions. Furthermore, its compatibility with various truck components makes it a versatile option for different fastening needs.

Installation Guidelines

Proper installation of the 3902451 Hexagon Flange Head Cap Screw is crucial for optimal performance. Begin by ensuring the mating surfaces are clean and free of debris. Use the appropriate tool to insert and tighten the screw to the specified torque settings. It is important to follow the manufacturer’s guidelines to avoid over-tightening, which can lead to damage, or under-tightening, which can compromise the fastening integrity. Regular checks post-installation can help ensure the screw remains secure.

Troubleshooting and Maintenance

Common issues with the 3902451 Hexagon Flange Head Cap Screw may include loosening or corrosion. To address loosening, re-tighten the screw to the specified torque settings and inspect for any underlying issues that may cause repeated loosening. Corrosion can be mitigated by applying a suitable anti-corrosion treatment during installation and performing regular inspections. Maintenance practices such as periodic tightening and condition checks can prolong the service life of the screw.

Compatibility and Applications

The 3902451 Hexagon Flange Head Cap Screw is designed to be compatible with a range of heavy-duty truck models and components. It is commonly used in applications where secure fastening is required, such as attaching brackets, panels, and other structural components. Its versatility and robust design make it suitable for various fastening needs in truck maintenance and repair.

Cummins Overview

Cummins Inc. is a leading manufacturer in the automotive industry, known for its high-quality engines, components, and technologies. With a rich history of innovation and a strong reputation for reliability, Cummins provides a wide range of products designed to meet the needs of heavy-duty applications. The company’s commitment to quality and performance is reflected in its offerings, including the 3902451 Hexagon Flange Head Cap Screw.

Hexagon Flange Head Cap Screw 3902451 in Cummins Engines

The Cummins Hexagon Flange Head Cap Screw part number 3902451 is a critical component in various Cummins engine models. This screw is designed to secure different parts of the engine, ensuring structural integrity and operational efficiency. Below is a detailed description of how this part fits within the specified Cummins engines.

4B3.9, 6B5.9, 6C8.3, B4.5, B4.5 CM2350 B129B, B5.9 G, B5.9 GAS PLUS CM556, B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C, B6.7 G CMOH6.0 B125, C GAS PLUS CM556, C8.3 G, D4.0 CM2620 D103B, F3.8 CM2350 F128C, F4.5 CM2620 F139B, G8.3, G8.3 CM558, GTA8.3 CM558

The 3902451 screw is commonly used in these engines to fasten various components, including but not limited to, the cylinder head, intake manifold, and other critical engine parts. Its flange head design provides a larger bearing surface, which is essential for distributing the load evenly and preventing damage to the engine parts.

ISB CM2150, ISB CM550, ISB CM850, ISB/ISD4.5 CM2150 B119, ISB/ISD6.7 CM2150 SN, ISB4.5 CM2350 B104

In the ISB series engines, the 3902451 screw is utilized to secure the cylinder head and other critical engine components. The ISB engines are known for their durability and efficiency, and the use of this screw ensures that these components remain tightly fastened, contributing to the engine’s overall performance and longevity.

The 3902451 screw’s compatibility across these engines highlights its versatility and importance in maintaining the structural integrity of the engine. Its use in various engine models underscores its reliability and effectiveness in securing engine components.

Role of Part 3902451 Hexagon Flange Head Cap Screw in Engine Systems

The Hexagon Flange Head Cap Screw (part number 3902451) is an essential fastening component utilized across various engine systems to ensure secure and reliable connections. Its application spans multiple critical areas within the engine assembly, contributing to the overall integrity and functionality of the engine.

Key Applications:

• Adapter and Front Drive: The screw is employed to fasten adapters and front drive components, ensuring a stable connection that can withstand operational stresses.

• Aftercooler and Arrangement: In aftercooler systems, it secures components that facilitate the cooling of compressed air, maintaining efficient engine performance.

• Turbocharger and Breather: It plays a role in attaching turbocharger components and breather systems, which are vital for managing engine pressure and ventilation.

• Crankcase and Compressor: The screw is used in the assembly of crankcase and compressor components, ensuring that these high-stress areas remain securely fastened.

• Refrigerant and Connection: In systems involving refrigerants, it secures connections that are crucial for maintaining the integrity of cooling circuits.

• Water Inlet and Drive: It fastens water inlet components and drive mechanisms, ensuring reliable fluid flow and mechanical drive integrity.

• Fan and Front Engine Support: The screw is integral in securing fan assemblies and front engine support structures, which are essential for engine cooling and structural stability.

• Housing and Front Gear: It is used in the assembly of housing units and front gear components, ensuring these parts are securely in place.

• Thermostat and Long Block: In thermostat housings and long block assemblies, the screw ensures that temperature regulation components are firmly attached.

• Main Bearing Cap Remover and Mounting: It aids in the secure attachment of main bearing cap removers and various mounting brackets throughout the engine.

• Alternator and Plumbing: The screw is utilized in alternator assemblies and plumbing connections, ensuring electrical and fluid systems are reliably fastened.

• Air Cleaner and Pulley: It secures air cleaner components and pulleys, which are critical for air intake and mechanical drive systems.

• Crankshaft and Pump: In crankshaft and pump assemblies, the screw ensures that these rotating components are securely mounted.

• Fuel and Lubricating Oil: It is used in fuel and lubricating oil systems to secure pumps and related components, ensuring smooth operation.

• Radiator and Rail: The screw fastens radiator components and structural rails, contributing to cooling efficiency and structural integrity.

• Base and Service Kit: It is included in service kits for various engine bases, ensuring that replacement parts are securely installed.

• Support and Front Engine Mounting: The screw is vital in front engine support and mounting systems, providing necessary stability.

• Auxiliary Cooling and Thermostat Housing: It secures auxiliary cooling components and thermostat housings, ensuring efficient temperature management.

• Vent and Engine Coolant: The screw is used in vent systems and engine coolant circuits, ensuring these critical systems are reliably fastened.

Conclusion

The 3902451 Hexagon Flange Head Cap Screw is a vital component in heavy-duty truck and engine applications, providing secure and reliable fastening across a variety of critical systems. Its robust design, high-strength materials, and versatile applications make it an indispensable part in maintaining the structural integrity and performance of heavy-duty vehicles and engines.