3902112
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3902112, is a fastener produced by Cummins. This article provides an overview of this Cummins part, its purpose, key features, benefits, and maintenance suggestions.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of bolt characterized by a hexagonal head and a flanged base. The hexagonal head allows for easy tightening and loosening using a wrench or socket, while the flange provides additional surface area for distribution of clamping force. These screws are commonly used in applications requiring high strength and resistance to vibration ¹.

Purpose and Function

The 3902112 serves to secure components in heavy-duty truck assemblies. It is designed to withstand significant stress and vibration, ensuring reliable fastening in critical applications. This screw plays a role in maintaining the integrity of truck components by providing a strong and durable connection ².

Key Features

• Hexagonal head for easy tool engagement
• Flanged base for enhanced clamping force distribution
• High-strength material construction
• Designed to resist corrosion and wear
• Suitable for high-vibration environments

Benefits

• Provides secure and durable fastening
• Enhances the reliability of truck component assemblies
• Resists loosening due to vibration
• Offers corrosion resistance for prolonged service life
• Ensures consistent clamping force across the fastened components

Troubleshooting and Maintenance

Regular inspection of the 3902112 is recommended to ensure it remains tight and free of corrosion. If signs of wear or loosening are detected, the screw should be tightened or replaced as necessary. Using the correct torque specifications during installation helps maintain the screw’s integrity and performance ³.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a commitment to innovation and quality, Cummins provides reliable solutions for a variety of industries, including transportation, construction, and power generation.

Cummins Engine Compatibility with Hexagon Flange Head Cap Screw Part 3902112

The Cummins Hexagon Flange Head Cap Screw part number 3902112 is a versatile component designed to fit a variety of Cummins engines. This screw is integral in securing various parts within the engine assembly, ensuring structural integrity and operational efficiency. Below is a detailed overview of the engines that are compatible with this specific part.

Cummins 4 Series Engines

• 4B3.9
• B4.5
• B4.5 CM2350 B129B
• B5.9
• B5.9 G
• B5.9 GAS PLUS CM556

These engines, part of the Cummins 4 Series, utilize the 3902112 screw in their assembly, particularly in securing components that require a flange head cap screw.

Cummins 6 Series Engines

• 6B5.9
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• F3.8 CM2350 F120B
• F3.8 CM2620 F137B
• F3.8 F102
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C
• G8.3
• ISB CM2150
• ISB CM550
• ISB CM850
• ISB/ISD6.7 CM2150 SN
• ISB4.5 CM2350 B104
• ISB6.7 CM2250

The Cummins 6 Series engines, including both the B and F models, as well as the ISB variants, incorporate the 3902112 screw in their design. This screw is used in various applications, such as securing engine covers, brackets, and other critical components.

Cummins C Series Engines

• C GAS PLUS CM556
• C8.3 G

The C Series engines also benefit from the use of the 3902112 screw. This part is essential in maintaining the structural integrity of these engines, ensuring that all fastened components remain securely in place.

Cummins D Series Engines

• D4.0 CM2620 D103B

The D Series engines, including the D4.0 model, use the 3902112 screw in their assembly. This screw is crucial for securing various engine components, contributing to the overall reliability and performance of the engine.

The Cummins Hexagon Flange Head Cap Screw part number 3902112 is a critical component in the assembly of multiple Cummins engine series. Its use across various engine models underscores its versatility and importance in ensuring the engines’ structural integrity and operational efficiency.

Role of Part 3902112 Hexagon Flange Head Cap Screw in Engine Systems

The 3902112 is instrumental in securing and maintaining the integrity of various engine components. Its robust design ensures a firm and reliable connection, which is essential for the efficient operation of the engine system.

Air Intake Connection Kit

In the air intake connection kit, the Hexagon Flange Head Cap Screw is used to secure the connections between the air filter housing and the intake manifold. This ensures a sealed and stable connection, preventing air leaks that could affect engine performance.

Auxiliary Pump

For the auxiliary pump, this screw plays a role in attaching the pump to its mounting bracket. This secure attachment is vital for the pump’s stable operation, especially under varying engine loads.

Camshaft

In camshaft applications, the screw is employed to fasten the camshaft to the engine block or head. This secure fitting is necessary to maintain proper valve timing and engine operation.

Catalytic Converter

The Hexagon Flange Head Cap Screw is utilized in the mounting of the catalytic converter to the exhaust system. This ensures that the converter remains firmly in place, contributing to effective emission control.

Engine Oil Cooler

For the engine oil cooler, the screw is used to attach the cooler to the engine block or mounting bracket. This secure attachment is important for the efficient cooling of engine oil, which is crucial for engine longevity.

Front Gear Cover

In the front gear cover, the screw is used to fasten the cover to the engine block. This ensures that the cover remains securely in place, protecting the internal components from contaminants.

Fuel Pump Coupling

The screw is instrumental in securing the fuel pump coupling to the engine or fuel system. This stable connection is essential for the reliable delivery of fuel to the engine.

Guard Package

In the guard package, the screw is used to attach the guards to the engine components. This secure fitting protects sensitive parts from damage due to debris or impacts.

Heat Exchanger

For the heat exchanger, the screw is employed to fasten the exchanger to its mounting location. This secure attachment ensures efficient heat transfer and system performance.

Injector

In injector applications, the screw is used to secure the injector to the engine block or cylinder head. This ensures a stable and sealed connection, which is vital for precise fuel delivery.

Lubricating Oil Cooler Module

The screw is utilized in attaching the lubricating oil cooler module to the engine. This secure fitting is important for the efficient cooling of lubricating oil, which is essential for engine health.

Oil Control Valve

In the oil control valve, the screw is used to fasten the valve to the engine block or cylinder head. This ensures a stable connection, which is necessary for the valve’s effective operation.

Oil Level Gauge

For the oil level gauge, the screw is employed to secure the gauge to the engine block. This stable attachment ensures accurate oil level readings, which are important for engine maintenance.

Oil Pan Mounting

In oil pan mounting, the screw is used to fasten the oil pan to the engine block. This secure fitting is essential for containing engine oil and protecting the engine’s lower components.

On Board Spares

The screw is utilized in securing on board spares to the engine or vehicle. This ensures that spare parts are readily available and securely stored.

Performance Parts

In performance parts, the screw is used to attach various components to the engine. This secure fitting is important for the reliable operation of performance-enhancing parts.

Raw Water Pump Plumbing

For raw water pump plumbing, the screw is employed to secure the plumbing connections. This ensures a sealed and stable connection, which is vital for the efficient operation of the water pump.

Refrigerant Compressor

In refrigerant compressor applications, the screw is used to fasten the compressor to its mounting location. This secure attachment is essential for the reliable operation of the compressor.

Thermostat Housing

The screw is utilized in attaching the thermostat housing to the engine. This secure fitting ensures proper thermostat function and engine temperature control.

Turbocharger Arrangement

In turbocharger arrangements, the screw is used to secure the turbocharger to the engine. This stable connection is important for the efficient operation of the turbocharger.

Turbocharger Location

For turbocharger location, the screw is employed to fasten the turbocharger to its designated location on the engine. This ensures a stable and secure fitting.

Water Inlet Connection

In water inlet connections, the screw is used to secure the inlet to the engine or cooling system. This stable connection is vital for the efficient flow of coolant.

Water Pump

For the water pump, the screw is utilized to fasten the pump to the engine block. This secure attachment ensures the reliable operation of the water pump, which is essential for engine cooling.

Conclusion

The 3902112 Hexagon Flange Head Cap Screw is a critical component in the assembly and maintenance of Cummins engines. Its robust design, resistance to corrosion and vibration, and versatile applications make it an essential part for ensuring the structural integrity and operational efficiency of engine systems. Regular maintenance and proper installation are key to maximizing the performance and longevity of this part.