3901865
Hexagon Flange Head Cap Screw
Cummins®

This article provides an overview of the Cummins Hexagon Flange Head Cap Screw, part number 3901865. It covers the basic concepts, purpose, key features, benefits, and maintenance suggestions for this component, which is used in commercial trucks.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by a hexagonal head and a flanged base. The hexagonal head allows for efficient torque application using a wrench or socket, while the flange provides additional surface area to distribute the load and prevent the screw from pulling through the material ².

Purpose and Function

The 3901865 Hexagon Flange Head Cap Screw by Cummins is designed for use in commercial trucks. It plays a role in securing various components and assemblies within the truck’s structure. The screw is commonly used in applications where a combination of high strength and resistance to loosening is required ¹.

Key Features

• Hexagonal head for easy torque application
• Flanged base to distribute load and prevent pull-through
• Manufactured from high-strength materials
• Designed for use in demanding commercial truck applications

Benefits

• Provides a secure and reliable fastening solution
• Offers resistance to loosening due to vibration
• Distributes load effectively, reducing the risk of damage to the fastened material
• Constructed from durable materials to withstand harsh operating conditions

Troubleshooting and Maintenance

Regular inspection of the 3901865 Hexagon Flange Head Cap Screw is recommended to ensure it remains in good condition. Signs of wear, corrosion, or loosening should be addressed promptly to maintain the integrity of the fastened components. Proper torque specifications should be followed during installation to avoid over-tightening or under-tightening, which can lead to failure ².

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. The company is known for its commitment to quality, innovation, and customer satisfaction. Cummins’ extensive product line includes a wide range of components and systems for the commercial truck industry.

Cummins Engine Part 3901865: Hexagon Flange Head Cap Screw

The Cummins part 3901865, a Hexagon Flange Head Cap Screw, is a critical component used in various Cummins engine models. This part is designed to secure and hold together different parts of the engine, ensuring that the engine operates smoothly and efficiently.

Application in Cummins Engines

15N CM2380 M104B, 4B3.9, 6B5.9, 6C8.3, B4.5, B4.5 CM2350 B129B, B4.5 RGT, B5.6 CM2670 B152B, B5.9 G, B5.9 GAS PLUS CM556

The Hexagon Flange Head Cap Screw is utilized in these engines to fasten various components, including but not limited to, cylinder heads, intake manifolds, and exhaust manifolds. This screw provides the necessary torque and stability, ensuring that these parts remain securely in place under the high stress and varying temperatures of engine operation.

B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C, B6.7 G CMOH6.0 B125, B6.7S, C GAS PLUS CM556

In these engines, the part 3901865 is also employed to secure critical components such as fuel injectors, turbochargers, and other ancillary parts. Its design allows it to withstand the rigorous demands of these engines, which are often used in heavy-duty applications.

D4.0 CM2620 D103B, F2.8 CM2620 F135B, F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F3.8 F102, F4.5 CM2620 F139B, F4.5 CM2670 F141C

For these engines, the Hexagon Flange Head Cap Screw is used in similar applications, ensuring that components such as valve covers, oil pans, and other structural parts are held firmly in place. The screw’s design provides the necessary strength and durability to maintain the integrity of these parts under the demanding conditions of engine operation.

The use of the Hexagon Flange Head Cap Screw in these engines highlights its versatility and importance in maintaining the structural integrity and operational efficiency of Cummins engines.

Hexagon Flange Head Cap Screw in Engine Systems

The Hexagon Flange Head Cap Screw, identified by part number 3901865, is a versatile fastener utilized across various components in engine systems. Its design allows for secure and reliable connections, ensuring the integrity and functionality of the engine’s components.

Applications

• Air Crossover Connection: Secures the crossover pipe, ensuring a tight seal and efficient airflow between the air intake and the engine’s combustion chambers.
• Air Fuel Mixer: Attaches the mixer housing to the engine block, maintaining the precise mixture of air and fuel necessary for optimal combustion.
• Coolant Heater Starting Aid: Fastens the heater element to the engine block, facilitating easier starting in cold conditions by warming the engine coolant.
• Electrical Accessories: Secures various components such as sensors and wiring harnesses, ensuring they remain in place and function correctly.
• Electronic Engine Control System: Attaches control modules and sensors, guaranteeing accurate data collection and engine performance management.
• Electronic Engine Monitor: Secures monitoring components, allowing for real-time engine diagnostics and performance tracking.
• Engine Control Engine Bill of Materials - Module: Assembles and secures various control modules, ensuring they are correctly positioned and operational.
• Engine Control Module and Engine Control Module Plumbing: Attaches the module to the engine and secures plumbing connections, respectively.
• Fuel Control Module and Fuel Supply Plumbing: Ensures that fuel lines and control modules are securely fastened, preventing leaks and ensuring consistent fuel delivery.
• Kit, HHP 12V VLV/ELEC and Kit, HHP 24V VLV/ELEC: Secures electrical components and valves, ensuring reliable operation of the high-pressure fuel systems.
• Long Block and Long Block Kit: Fastens various components to the engine block, ensuring structural integrity and proper function.
• Magnetic Switch Mounting: Secures the switch to the engine, ensuring it can accurately detect and control engine operations.
• N14 12V Pressure-Time Centinel Kit: Attaches pressure sensors and control components, maintaining the precise regulation of engine pressure.
• Oil Pan: Secures the pan to the engine block, ensuring a sealed environment for the engine oil.
• Pace Control Module: Fastens the module to the engine, allowing for precise control of engine speed and performance.
• Rear Gear Housing: Secures the housing to the engine, ensuring smooth operation of the gear system.
• Sensor, Oil: Attaches oil sensors to the engine, allowing for accurate monitoring of oil levels and conditions.
• Turbocharger and Turbocharger Arrangement: Secures turbocharger components, ensuring efficient air compression and engine performance.
• Voltage Regulator Mounting: Secures the regulator to the engine, ensuring stable electrical output.
• Water Inlet Connection: Attaches the water inlet to the engine, ensuring proper coolant flow and engine temperature regulation.

Conclusion

The Cummins Hexagon Flange Head Cap Screw, part number 3901865, is a critical component in the maintenance and operation of commercial truck engines. Its design and features make it an essential fastener for securing various engine components, ensuring the structural integrity and operational efficiency of Cummins engines. Regular maintenance and proper installation are crucial to maximizing the benefits of this part.

References