3943157
Studded Flange Cap Screw
Cummins®

Introduction

The Studded Flange Cap Screw, part number 3943157, is a component manufactured by Cummins, a prominent entity in the automotive industry, especially in commercial truck applications. This screw is vital for the mechanical systems of trucks, ensuring secure fastening and dependable operation.

Basic Concepts

A Studded Flange Cap Screw is a fastener that includes a threaded stud and a flanged head. The stud is designed to be inserted through holes in components, and the flanged head provides a broad surface area for tightening, which helps distribute the clamping force more evenly. In a truck’s mechanical system, this screw plays a role in securing various components together, ensuring they remain firmly in place under operational stress ¹.

Purpose and Role in Truck Operation

The 3943157 Studded Flange Cap Screw is utilized in several truck systems where secure fastening is required. It is commonly found in engine components, transmission systems, and chassis assemblies. By providing a strong and stable connection, it contributes to the overall integrity and performance of the truck ².

Key Features

The 3943157 Studded Flange Cap Screw is crafted from high-quality materials, typically a durable alloy steel, which offers excellent strength and resistance to wear. Its design includes a hexagonal flange head that allows for easy tightening with standard tools, and the studded feature ensures it can be used in applications where through-bolting is necessary. These characteristics enhance its performance and reliability in demanding truck environments.

Benefits

Using the 3943157 Studded Flange Cap Screw offers several advantages. Its robust material composition and design contribute to durability, ensuring it can withstand the rigors of commercial truck use. The screw’s reliable performance reduces the likelihood of fastening failures, which can lead to component misalignment or damage. Additionally, its ease of installation and maintenance supports efficient truck operation and reduces downtime.

Installation and Usage

Proper installation of the 3943157 Studded Flange Cap Screw involves ensuring the stud is correctly aligned with the holes in the components it is meant to secure. It should be tightened to the manufacturer’s specified torque settings to ensure a secure fit without over-tightening, which could damage the screw or the components. Safety considerations include wearing appropriate personal protective equipment and ensuring the work area is secure to prevent accidents.

Troubleshooting and Maintenance

Regular inspection of the 3943157 Studded Flange Cap Screw for signs of wear, corrosion, or loosening is recommended to maintain its effectiveness. If any issues are detected, the screw should be replaced or tightened as necessary. Keeping the screw and surrounding areas clean and free of debris can also help prevent premature wear and ensure optimal performance.

Manufacturer - Cummins

Cummins is a reputable manufacturer in the automotive industry, known for its commitment to quality and innovation in truck components. With a history of producing reliable and high-performance parts, Cummins has established a strong reputation among commercial truck operators and maintenance professionals. The company’s dedication to excellence is reflected in the design and manufacturing of the 3943157 Studded Flange Cap Screw ³.

Engine Compatibility with Studded Flange Cap Screw 3943157

The Studded Flange Cap Screw 3943157, manufactured by Cummins, is compatible with various engine models. This part is essential for securing flanges and ensuring a tight seal in several applications. Below is a detailed breakdown of the engine models that are compatible with this part:

Cummins ISB and ISBE Series

• ISB CM550
• ISBE CM800

The Studded Flange Cap Screw 3943157 is integral to the ISB and ISBE series engines, providing robust fastening for flanges that are critical in maintaining system integrity. These engines are known for their reliability and performance, and the use of this screw ensures that all flange connections are secure.

Cummins ISC and ISL Series

• ISC CM554
• ISL CM554

In the ISC and ISL series engines, the Studded Flange Cap Screw 3943157 is used extensively for securing various flanges. These engines are designed for heavy-duty applications, and the screw’s design helps in maintaining the structural integrity of the engine under demanding conditions.

Cummins QSB and QSC Series

• QSB5.9 44 CM550
• QSC8.3 CM554

For the QSB and QSC series engines, the Studded Flange Cap Screw 3943157 is utilized to ensure that flanges are tightly secured. These engines are often used in industrial and agricultural applications, where reliability and durability are paramount.

Cummins QSL Series

• QSL9 CM554

In the QSL series engines, the Studded Flange Cap Screw 3943157 plays a crucial role in maintaining the integrity of flange connections. This engine is designed for demanding environments, and the screw’s design helps in ensuring that all connections are secure and leak-proof.

Each of these engines relies on the Studded Flange Cap Screw 3943157 for critical flange connections, ensuring that the engine operates efficiently and reliably.

Role of Part 3943157 Studded Flange Cap Screw in Engine Systems

The 3943157 studded flange cap screw is instrumental in securing and maintaining the integrity of various engine components. In the context of a turbocharger arrangement, this screw plays a significant role in ensuring that the turbocharger is properly mounted and aligned within the engine system.

Turbocharger Mounting

In turbocharger mounting, the 3943157 screw is used to fasten the turbocharger to the engine block or the exhaust manifold. This secure attachment is essential for withstanding the high temperatures and pressures generated during operation. The screw’s studded flange design provides additional surface area and stability, reducing the risk of loosening over time.

Turbocharger Arrangement

Within the turbocharger arrangement, the 3943157 screw is often employed to connect various components such as the compressor housing, turbine housing, and the center housing. These connections must be robust to handle the dynamic forces and thermal expansions that occur during engine operation. The screw ensures that all parts remain aligned and function efficiently, contributing to the overall performance and reliability of the turbocharger system.

General Engine Component Arrangement

Beyond the turbocharger, the 3943157 screw is also utilized in other engine component arrangements. It is commonly found in applications where secure fastening is required, such as in the attachment of sensor brackets, fuel injector mounts, and various engine covers. Its design allows for easy installation and removal, facilitating maintenance and repairs.

Conclusion

In summary, the 3943157 studded flange cap screw is a versatile and reliable fastener that enhances the structural integrity and operational efficiency of engine systems, particularly in high-stress applications like turbocharger arrangements and mountings.