3864129
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3864129, is a component manufactured by Cummins. This screw plays a significant role in the maintenance and operation of commercial trucks. Cummins, a well-established name in the industry, ensures that this component meets the rigorous demands of heavy-duty applications.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flanged base. The hexagonal head allows for efficient torque application using standard tools, while the flange provides additional surface area for distribution of clamping force. This design is integral to mechanical systems where secure fastening and resistance to loosening are required ¹.

Purpose and Role in Truck Operation

The 3864129 Hexagon Flange Head Cap Screw serves a specific purpose in commercial trucks by securing various components and contributing to the structural integrity of the vehicle. It is often used in applications where vibrations and dynamic loads are present, ensuring that parts remain firmly attached under operating conditions ².

Key Features

The 3864129 Hexagon Flange Head Cap Screw features a hexagonal head design that facilitates easy and precise tightening. Its flange characteristics provide enhanced resistance to rotation, which is beneficial in applications where the screw may be subjected to torque. The material properties of this screw, typically high-strength steel, contribute to its effectiveness and durability in demanding environments ³.

Benefits

This screw offers several benefits, including enhanced fastening security due to its design, resistance to vibration which helps maintain tightness over time, and ease of installation and removal. These attributes make it a reliable choice for applications where consistent performance is required.

Installation and Usage

Proper installation of the 3864129 Hexagon Flange Head Cap Screw involves adhering to torque specifications provided by the manufacturer to ensure optimal performance and longevity. Best practices include using the correct tools and ensuring that the mating surfaces are clean and free from debris to achieve the desired clamping force.

Troubleshooting and Maintenance

Common issues with the 3864129 Hexagon Flange Head Cap Screw may include loosening or corrosion. Regular inspection and maintenance can help identify these problems early. Recommended practices include checking for proper torque, signs of wear, and applying appropriate coatings or treatments to prevent corrosion and extend the screw’s lifespan.

Safety Considerations

When working with the 3864129 Hexagon Flange Head Cap Screw, it is important to follow safety precautions. This includes proper handling to avoid injury, storing the screws in a dry and secure location to prevent damage, and disposing of them in accordance with environmental regulations to minimize impact.

Cummins Overview

Cummins is a reputable manufacturer with a long history in the commercial truck industry. The company offers a wide range of products designed for durability and performance. Cummins’ commitment to quality and innovation is reflected in their components, including the 3864129 Hexagon Flange Head Cap Screw, which is engineered to meet the high standards of commercial truck applications.

Cummins Hexagon Flange Head Cap Screw 3864129 in Engine Applications

The Cummins Hexagon Flange Head Cap Screw, part number 3864129, is a critical component in the assembly and maintenance of various Cummins engines. This part is designed to provide a secure fastening solution, ensuring the integrity and reliability of the engine’s components.

QSB3.3 CM2250 EC Engines

In the QSB3.3 CM2250 EC engines, the 3864129 screw is utilized in several key areas. It is often employed in securing engine covers and housings, which are essential for protecting internal components from external elements and ensuring the engine’s operational efficiency. The screw’s design, featuring a hexagonal flange head, allows for easy and precise tightening with standard tools, which is crucial during both assembly and routine maintenance.

Grouping of Engines

When considering the application of the 3864129 screw across different Cummins engines, it is evident that this part plays a versatile role. Its use in securing various engine parts underscores its importance in maintaining the structural integrity and operational efficiency of the engines. The screw’s compatibility with multiple engine models highlights its standardized design, which is engineered to meet the rigorous demands of heavy-duty engine applications.

Hexagon Flange Head Cap Screw (Part 3864129) Component Usage

The Hexagon Flange Head Cap Screw (Part 3864129) is a versatile fastener that plays a significant role in securing various components within engine systems. Its robust design and reliable performance make it an essential part in the assembly and maintenance of several key engine components.

Air Compressor and Air Compressor Upfit Kit

In the air compressor and air compressor upfit kit, the Hexagon Flange Head Cap Screw is used to secure the compressor housing to the engine block. This ensures a stable and leak-free connection, which is vital for the efficient operation of the compressor. Additionally, it helps in maintaining the alignment of the compressor with other components, ensuring optimal performance.

Compressor Coolant Plumbing and Coolant Heater Starting Aid

For the compressor coolant plumbing and coolant heater starting aid, these screws are employed to fasten the plumbing components securely. This is important for maintaining the integrity of the coolant system, preventing leaks, and ensuring consistent coolant flow, which is essential for temperature regulation in the engine.

Corrosion Resistor and Corrosion Resistor Mounting

In corrosion resistor and corrosion resistor mounting applications, the Hexagon Flange Head Cap Screw is used to attach the corrosion resistor to the engine block or other structural components. This helps in protecting the engine from corrosive elements, thereby extending the lifespan of the engine components.

Cylinder Block

Within the cylinder block, these screws are utilized to secure various attachments and accessories. Their strength and reliability ensure that these components remain firmly in place, contributing to the overall stability and performance of the engine.

Engine Control Module (ECM) and ECM Mounting

For the engine control module (ECM) and ECM mounting, the Hexagon Flange Head Cap Screw is critical in securing the ECM to its designated location. This ensures that the ECM remains stable and properly aligned, which is essential for accurate engine management and control.

Engine Control Module Plumbing

In engine control module plumbing, these screws are used to fasten plumbing components that are integral to the ECM’s operation. This includes securing sensors, connectors, and other critical components, ensuring they function correctly and remain in place under various operating conditions.

Fan Drive

The fan drive system benefits from the use of these screws to secure the fan assembly to the engine. This ensures that the fan operates efficiently and remains aligned, contributing to effective engine cooling.

Fuel Injection Pump and Fuel Pump

In the fuel injection pump and fuel pump systems, the Hexagon Flange Head Cap Screw is used to secure the pump housing and other components. This ensures that the fuel system remains intact and functions correctly, which is essential for the engine’s performance and fuel efficiency.

Idler Pulley

For the idler pulley, these screws are used to attach the pulley to the engine block or other structural components. This ensures that the pulley remains in the correct position, maintaining the proper tension in the belt system and ensuring smooth operation of the engine’s accessory drives.

Oil Fill Arrangement and Oil Filler Arrangement

In the oil fill arrangement and oil filler arrangement, the Hexagon Flange Head Cap Screw is used to secure the oil fill cap and associated components. This ensures a tight seal, preventing oil leaks and maintaining the integrity of the lubrication system.

Turbocharger Plumbing

Finally, in turbocharger plumbing, these screws are employed to secure the plumbing components that are part of the turbocharger system. This ensures that the turbocharger operates efficiently, contributing to enhanced engine performance and power output.

Conclusion

The 3864129 Hexagon Flange Head Cap Screw is a vital component in the maintenance and operation of commercial trucks and various engine systems. Its design, featuring a hexagonal head and flanged base, provides secure fastening and resistance to loosening, making it suitable for heavy-duty applications. The screw’s compatibility with multiple engine models and its use in securing critical components underscore its importance in maintaining the structural integrity and operational efficiency of engines. Proper installation, regular maintenance, and adherence to safety precautions are essential to ensure the optimal performance and longevity of this Cummins part.