3902115
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by Part #3902115, is a component manufactured by Cummins, a well-regarded name in the automotive and heavy-duty truck industry. This screw plays a significant role in the maintenance and operation of commercial trucks, ensuring the secure fastening of various components. Its design and functionality are tailored to meet the demanding requirements of heavy-duty applications.

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 across the fastened material. Within mechanical systems, these screws are used to secure components, ensuring structural integrity and reliable operation ¹.

Purpose and Role in Truck Operation

The 3902115 Hexagon Flange Head Cap Screw serves a specific purpose in the context of commercial trucks. It is primarily used to secure components that require a high degree of fastening security and resistance to vibration. By providing a stable and robust connection, this screw helps maintain the structural integrity of the truck, ensuring that critical components remain firmly in place under various operating conditions ².

Key Features

The 3902115 Hexagon Flange Head Cap Screw boasts several key features that contribute to its effectiveness and durability. Its hexagonal head design allows for easy and efficient tightening using standard tools, reducing the risk of cam-out during installation. The flange characteristic provides an increased bearing surface, which helps distribute the load and prevents the screw from digging into the fastened material. Additionally, the screw is made from high-quality materials, ensuring it can withstand the rigors of heavy-duty applications ³.

Benefits

Using the 3902115 Hexagon Flange Head Cap Screw offers several benefits. The design enhances fastening security, making it less likely for the screw to loosen over time. Its resistance to vibration is particularly advantageous in the dynamic environment of a commercial truck, where components are subject to constant movement and stress. Furthermore, the ease of installation and removal simplifies maintenance procedures, allowing for quick and efficient component changes or repairs.

Installation and Usage

Proper installation of the 3902115 Hexagon Flange Head Cap Screw is crucial for optimal performance. It is recommended to follow torque specifications provided by the manufacturer to ensure the screw is tightened to the correct level, avoiding over-tightening or under-tightening. Best practices include using the appropriate tools and ensuring the screw is aligned correctly with the fastened material to prevent cross-threading and damage.

Troubleshooting and Maintenance

Common issues associated with Hexagon Flange Head Cap Screws include loosening due to vibration, corrosion, and damage from improper installation. Troubleshooting tips involve regularly inspecting the screws for signs of wear or corrosion and tightening them as necessary. Maintenance practices such as applying an anti-seize compound can help prolong the lifespan and reliability of the screw, ensuring it continues to perform effectively over time.

Manufacturer - Cummins

Cummins is a reputable manufacturer in the automotive and heavy-duty truck industry, known for its commitment to producing high-quality components. The company’s reputation is built on a history of innovation, reliability, and customer satisfaction. Cummins’ dedication to excellence is evident in the design and manufacturing of the 3902115 Hexagon Flange Head Cap Screw, ensuring it meets the stringent demands of commercial truck applications.

Compatibility with Cummins Engines

The Hexagon Flange Head Cap Screw part number 3902115, manufactured by Cummins, is a versatile component that fits a variety of Cummins engines. This screw is designed to secure various parts within the engine assembly, ensuring that components remain tightly fastened and in place during operation.

Cummins 4B3.9 and 6B5.9 Engines

The 4B3.9 and 6B5.9 engines benefit from the use of the 3902115 screw in several applications. This screw is often used in securing valve covers, oil pans, and other critical engine components that require a robust fastening solution.

Cummins 6C8.3 and L8.9 Engines

For the 6C8.3 and L8.9 engines, the 3902115 screw is integral in fastening various parts, including the cylinder head covers and other structural components. Its design ensures a secure fit, which is crucial for maintaining engine integrity under high stress conditions.

Cummins B4.5, B5.9, and B5.9 GAS PLUS CM556 Engines

In the B4.5, B5.9, and B5.9 GAS PLUS CM556 engines, the 3902115 screw is used to fasten components such as the turbocharger housing and other critical parts. Its flange head design provides a larger surface area for the wrench, ensuring a tight and secure fit.

Cummins B6.7 G CMOH6.0 B125 and QSB3.9 30 CM550 Engines

The B6.7 G CMOH6.0 B125 and QSB3.9 30 CM550 engines utilize the 3902115 screw in securing the cylinder heads and other engine components. This screw’s ability to withstand high torque makes it ideal for these applications.

Cummins C8.3 G, ISB CM550, and QSB3.9 CM2880 B138 Engines

For the C8.3 G, ISB CM550, and QSB3.9 CM2880 B138 engines, the 3902115 screw is used in fastening various engine parts, including the intake manifold and other structural components. Its design ensures that these parts remain securely fastened, contributing to the engine’s overall performance and longevity.

Cummins ISBE4 CM850, ISC CM554, and ISC CM850 Engines

The ISBE4 CM850, ISC CM554, and ISC CM850 engines use the 3902115 screw in securing the engine block and other critical components. Its flange head design allows for easy and efficient tightening, ensuring that the engine remains stable during operation.

Cummins ISL CM554, ISL G CM2180, and ISL9 CM2150 SN Engines

In the ISL CM554, ISL G CM2180, and ISL9 CM2150 SN engines, the 3902115 screw is used to fasten various parts, including the turbocharger and other high-stress components. Its robust design ensures that these parts remain securely fastened, contributing to the engine’s overall performance.

Cummins QSB4.5 CM2250 EC, QSB4.5 CM850 (CM2850), and QSB5.9 30 CM550 Engines

For the QSB4.5 CM2250 EC, QSB4.5 CM850 (CM2850), and QSB5.9 30 CM550 engines, the 3902115 screw is used in securing various engine components, including the cylinder head and other critical parts. Its design ensures a secure fit, which is crucial for maintaining engine integrity under high stress conditions.

Cummins QSB5.9 44 CM550, QSB5.9 CM2880 B139, and QSB5.9 CM550 Engines

Finally, the QSB5.9 44 CM550, QSB5.9 CM2880 B139, and QSB5.9 CM550 engines use the 3902115 screw in securing various parts, including the engine block and other structural components. Its flange head design allows for easy and efficient tightening, ensuring that the engine remains stable during operation.

Role of Part 3902115 Hexagon Flange Head Cap Screw in Engine Systems

The 3902115 Hexagon Flange Head Cap Screw is instrumental in securing various components within engine systems, ensuring stability and proper function.

Adapter and Drive Systems

In the context of adapters and drive systems, this screw is often used to fasten the front drive and rear gear train accessory drives. Its hexagonal flange head provides a secure grip, facilitating easy tightening and removal, which is essential during maintenance or repair procedures.

Alternator and Turbocharger Mounting

For alternators and turbochargers, the 3902115 screw plays a significant role in their mounting. Whether it’s securing the alternator at its designated location or supporting the turbocharger, this screw ensures that these components remain firmly in place, even under the high vibrations and stresses typical of engine operation.

Fuel System Components

Within the fuel system, the screw is employed in the mounting of the fuel pump and fuel injection pump. It helps in maintaining the integrity of the fuel delivery system by ensuring that these pumps are securely attached to their respective mounts.

Engine Control Module and Accessories

The engine control module (ECM) and various accessories like the front gear train accessory and rear gear train accessory also benefit from the use of this screw. It aids in the secure attachment of these components to the cylinder block and other structural elements, ensuring reliable operation of the engine’s electronic and mechanical systems.

Compressor and Air Systems

In compressor and air systems, the 3902115 screw is used to fasten components such as the compressor cover and air filter housing. This ensures that these parts are tightly sealed, which is vital for the efficient operation of the engine’s air intake and compression systems.

Front and Rear Engine Support

The screw is also pivotal in supporting the front and rear sections of the engine. It is used in the arrangement and mounting of various engine components, contributing to the overall structural integrity of the engine assembly.

Additional Applications

Beyond these primary applications, the 3902115 screw is also utilized in the arrangement and securing of the crankshaft pulley, fuel injection pump support, and various engine guards and packages. Its versatility makes it a staple in engine construction and maintenance.

Conclusion

The 3902115 Hexagon Flange Head Cap Screw is a critical component in the maintenance and operation of commercial trucks and various Cummins engines. Its design, featuring a hexagonal head and flange, ensures efficient torque application and load distribution, making it ideal for heavy-duty applications. The screw’s key features, including easy tightening, increased bearing surface, and high-quality materials, contribute to its durability and effectiveness. Benefits such as enhanced fastening security, vibration resistance, and simplified maintenance procedures make this Cummins part invaluable in ensuring the structural integrity and reliable operation of engine systems.