3521225
Hexagon Head Set Screw
Cummins®

The Cummins 3521225 Hexagon Head Set Screw is a specialized fastener designed for use in commercial trucks. Its purpose is to securely hold components in place, ensuring the structural integrity and operational efficiency of the vehicle. This screw is commonly applied in various parts of the truck, contributing to the overall reliability and performance of the machinery.

Basic Concepts of Hexagon Head Set Screws

A Hexagon Head Set Screw is a type of fastener characterized by its hexagonal socket head, which allows for easy installation and removal using a hex key. These screws are widely used in mechanical applications to secure components that require a tight fit without the need for a nut. They function by being driven into a pre-tapped hole, where the threads engage with the internal threads of the component, creating a secure connection ¹.

Role of the 3521225 Hexagon Head Set Screw in Truck Operation

The Cummins 3521225 Hexagon Head Set Screw plays a specific role in the operation and maintenance of commercial trucks. It is utilized in areas where secure fastening is required, such as in engine components, transmission systems, and chassis assemblies. Its application ensures that parts remain firmly in place, reducing the risk of mechanical failure and enhancing the truck’s operational efficiency ².

Key Features

The Cummins 3521225 Hexagon Head Set Screw is distinguished by several key features. It is made from high-quality materials, ensuring durability and resistance to wear and corrosion. The screw’s design specifications include a precise thread pitch and a robust hexagonal head, which facilitates easy and secure installation. Additionally, it may possess unique attributes such as a special coating to enhance its performance in demanding environments ³.

Benefits

Using the Cummins 3521225 Hexagon Head Set Screw offers several benefits. It provides improved security of parts, ensuring that components remain firmly attached under various operating conditions. The screw’s design allows for ease of installation and removal, making maintenance procedures more efficient. Furthermore, its high-quality construction contributes to long-term reliability, reducing the need for frequent replacements.

Installation and Usage Guidelines

Proper installation of the Cummins 3521225 Hexagon Head Set Screw is vital for optimal performance and longevity. To install, use the appropriate hex key to drive the screw into a pre-tapped hole until it achieves the desired tightness. Ensure that the screw is fully engaged with the internal threads to secure the component effectively. For removal, use the hex key to unscrew the fastener carefully, avoiding excessive force that could damage the screw or the component.

Troubleshooting and Maintenance

Common issues with Hexagon Head Set Screws include loosening over time due to vibration or wear. To address this, regularly inspect the screws during maintenance checks and tighten as necessary. If a screw appears damaged or corroded, it should be replaced to maintain the integrity of the connection. Proper lubrication can also help prevent seizing and extend the life of the screw.

Safety Considerations

When working with the Cummins 3521225 Hexagon Head Set Screw, it is important to observe several safety practices. Use the correct tools for installation and removal to avoid damaging the screw or the component. Wear appropriate personal protective equipment, such as gloves and safety glasses, to protect against injury. Additionally, ensure that the work area is clean and free from debris to prevent contamination of the screw or the component being fastened.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins is committed to quality and innovation in the automotive and engine manufacturing industry. The company’s product range includes a variety of components and systems designed to enhance the performance and reliability of commercial vehicles.

Hexagon Head Set Screw 3521225 Compatibility with Cummins Engines

The Cummins Hexagon Head Set Screw part number 3521225 is a versatile component designed to fit a variety of Cummins engines. This part is engineered to provide a secure fastening solution, ensuring the integrity and stability of engine components.

ISB and ISM Series Engines

The Hexagon Head Set Screw 3521225 is compatible with several models within the ISB and ISM series. These engines include:

• ISB5.9 CM2880 B110
• ISM CM570
• ISM11 CM876 SN
• ISX CM570
• ISX CM870
• ISX15 CM2250 SN

These engines are known for their robust performance and are often used in heavy-duty applications, such as commercial trucks and industrial machinery. The set screw is designed to fit into the specific mounting points of these engines, ensuring a tight and reliable connection.

QSK Series Engines

The Hexagon Head Set Screw 3521225 is also suitable for various QSK series engines. These include:

• QSK19 CM2350 K144G
• QSK19 CM500
• QSK19 CM850 MCRS
• QSK19G
• QSK38 CM2150 MCRS
• QSK38 CM850 MCRS
• QSK45 CM500
• QSK50 CM2150 K107
• QSK50 CM2150 MCRS
• QSK50 CM2350 K108

The QSK series engines are designed for high-performance applications, often found in marine and power generation sectors. The set screw’s design ensures it can withstand the demanding conditions these engines operate under, providing a secure fastening solution.

Other Cummins Engines

The Hexagon Head Set Screw 3521225 is also compatible with the following engines:

• 6B5.9
• 6C8.3
• B5.9 CM2670 B166C
• K19
• K38
• K50
• N14 MECHANICAL
• QSB5.9 CM2880 B139

These engines span a range of applications, from agricultural to industrial uses. The set screw’s design ensures it can fit into the specific mounting points of these engines, providing a secure fastening solution.

Summary

The Cummins Hexagon Head Set Screw part number 3521225 is a highly versatile component that fits a wide range of Cummins engines. Its design ensures it can provide a secure fastening solution across different engine series, including ISB, ISM, QSK, and others. This compatibility makes it an essential part for maintaining the integrity and stability of various engine components.

Role of Part 3521225 Hexagon Head Set Screw in Engine Systems

The part 3521225 Hexagon Head Set Screw is integral to the secure assembly and operation of various engine components. Its application spans across multiple systems, ensuring the stability and integrity of critical parts.

Actuator Bracket Kit

In the actuator bracket kit, the Hexagon Head Set Screw is used to firmly attach the bracket to the engine block or other mounting surfaces. This secure attachment is essential for the proper functioning of the actuator, which controls various engine parameters.

Assembly Turbocharger

Within the assembly turbocharger, this screw plays a role in securing components such as the turbine housing and compressor housing. It ensures that these parts remain aligned and tightly connected, which is vital for the efficient operation of the turbocharger.

Core Assembly H1C

For the core assembly H1C, the Hexagon Head Set Screw is employed to fasten internal components, ensuring that the assembly maintains its structural integrity under high-stress conditions.

Cylinder Head

In the cylinder head, this screw is often used to secure gaskets and other small components, contributing to the sealing and overall performance of the combustion chamber.

EBM: Turbocharger

The EBM (Electronically Controlled Boost Module) turbocharger utilizes the Hexagon Head Set Screw to secure electronic sensors and control units, ensuring precise monitoring and adjustment of boost levels.

Gear Fuel Pump Kit

Within the gear fuel pump kit, this screw is crucial for attaching the pump housing to the engine block, guaranteeing a leak-free and stable fuel delivery system.

Heat Exchanger 82 Water Cooler Turbocharger

In the heat exchanger 82 water cooler turbocharger, the screw is used to secure the cooler to the turbocharger, ensuring efficient heat dissipation and maintaining optimal turbocharger performance.

Intake Manifold

The intake manifold relies on the Hexagon Head Set Screw to secure the manifold to the cylinder head, ensuring a proper seal and efficient air intake.

Integrated Fuel System Module Service/Repair Kit

This screw is utilized in the integrated fuel system module service/repair kit to secure various components, ensuring the module’s reliability and performance.

Kit Turbocharger

In turbocharger kits, the screw is essential for assembling and securing turbocharger components, ensuring they function as a cohesive unit.

On Board Spares

For on board spares, the Hexagon Head Set Screw is used to secure spare parts, ensuring they are readily available and properly stored.

Oil Control Valve

The oil control valve uses this screw to attach to the engine block, ensuring precise oil flow management.

Oil Manifold

In the oil manifold, the screw secures various oil passages and components, contributing to the efficient distribution of oil throughout the engine.

Protective Cover

The protective cover employs the Hexagon Head Set Screw to secure the cover to the engine, safeguarding internal components from debris and damage.

Turbine Housing

The turbine housing relies on this screw to secure the housing to the turbocharger, ensuring it remains intact under high-temperature and high-pressure conditions.

Turbine Housing Heat Exchanger 80 Kit

In the turbine housing heat exchanger 80 kit, the screw is used to attach the heat exchanger to the turbine housing, enhancing cooling efficiency.

Turbine Housing Kit

This kit uses the Hexagon Head Set Screw to secure all components within the turbine housing, ensuring structural integrity and performance.

Turbine Housing Repair Kit

In the turbine housing repair kit, the screw is essential for reassembling and securing repaired components, restoring the housing to its original functionality.

Turbo HC5A

The Turbo HC5A utilizes this screw to secure various internal components, ensuring the turbocharger operates efficiently.

Turbocharger

In general turbocharger applications, the Hexagon Head Set Screw is used to secure the turbocharger to the engine, ensuring it functions correctly under various operating conditions.

Turbocharger Actuator Kit

The turbocharger actuator kit uses this screw to secure the actuator to the turbocharger, ensuring precise control of boost levels.

Turbocharger Aftermarket

Aftermarket turbochargers employ this screw to secure various components, ensuring compatibility and performance with the engine.

Turbocharger Repair Kit

In turbocharger repair kits, the screw is used to reassemble and secure repaired components, restoring the turbocharger to optimal condition.

Turbocharger T18-A Kit

The Turbocharger T18-A kit uses this screw to secure all components within the turbocharger, ensuring it functions efficiently.

Wastegate Actuator Kit

The wastegate actuator kit utilizes the Hexagon Head Set Screw to secure the actuator to the turbocharger, ensuring proper wastegate operation and boost control.

Conclusion

The Cummins 3521225 Hexagon Head Set Screw is a critical component in the maintenance and operation of commercial trucks and various Cummins engines. Its design and features ensure secure fastening, durability, and ease of use, contributing to the overall reliability and performance of the machinery. Proper installation, regular maintenance, and adherence to safety practices are essential for maximizing the benefits of this part.