3935477
Hexagon Flange Head Cap Screw
Cummins®

Introduction

The Hexagon Flange Head Cap Screw, identified by part number 3935477, is a crucial component in the assembly and maintenance of heavy-duty trucks. Manufactured by Cummins, a leader in the automotive and heavy-duty truck industry, this screw is utilized in various applications within heavy-duty trucks, contributing to the secure fastening of components and the overall structural integrity of the vehicle.

Basic Concepts

A Hexagon Flange Head Cap Screw is characterized by its hexagonal head and a flange that sits against the surface being fastened. This design allows for efficient torque application and provides a larger bearing surface, which helps distribute loads more evenly. Flange head screws are commonly used in mechanical systems where vibration resistance and secure fastening are required. They offer advantages such as improved load distribution and enhanced resistance to loosening ¹.

Purpose and Role in Truck Operation

This Cummins part plays a specific role in heavy-duty trucks by securely fastening components that are subject to significant stress and vibration. Its design ensures that critical parts remain firmly in place, contributing to the truck’s overall functionality and reliability. This screw is often used in applications where the fastening of metal plates, brackets, and other structural elements is necessary ².

Key Features

The 3935477 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance. It is typically made from high-strength materials such as alloy steel, which provides durability and resistance to wear. The screw features a coarse thread type, which allows for quick and secure fastening. The flange design offers a larger contact area, improving load distribution and reducing the risk of the screw pulling through the material. Additionally, the hexagonal head facilitates easy and efficient torque application using standard tools ³.

Benefits

Using the 3935477 Hexagon Flange Head Cap Screw offers several benefits. Its design allows for improved load distribution, which is crucial in applications where components are subject to dynamic loads. The screw’s resistance to vibration and loosening ensures that fastenings remain secure over time, reducing the need for frequent maintenance. Additionally, the high-strength material composition enhances the screw’s durability, making it suitable for heavy-duty applications ⁴.

Installation Guidelines

Proper installation of the 3935477 Hexagon Flange Head Cap Screw is crucial for optimal performance and longevity. Begin by ensuring that the mating surfaces are clean and free of debris. Use a torque wrench to apply the specified torque, which ensures that the screw is tightened to the manufacturer’s recommendations without over-tightening. It is also important to follow best practices such as using the correct tool for the hexagonal head to avoid damage. Regular inspection and maintenance will help ensure continued reliable performance.

Troubleshooting and Maintenance

Common issues associated with Hexagon Flange Head Cap Screws include loosening due to vibration and corrosion. To identify these issues, regularly inspect the screws for signs of movement or rust. Maintenance tips include applying a thread locker to prevent loosening and using corrosion-resistant coatings in environments where exposure to moisture is likely. Replacing screws that show signs of wear or damage will help maintain the integrity of the fastening.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history dating back to 1919, Cummins has established a strong reputation in the heavy-duty truck industry for its commitment to quality and innovation. The company’s product range includes a variety of components designed to enhance the performance and reliability of heavy-duty trucks. Cummins’ dedication to manufacturing high-quality truck components is evident in their rigorous testing and quality control processes.

Compatibility with Cummins Engines

The Hexagon Flange Head Cap Screw part number 3935477, manufactured by Cummins, is a versatile component that finds application across several of their engine models. This screw is designed to secure various parts within the engine assembly, ensuring structural integrity and operational efficiency.

G8.3 and QSB5.9 30 CM550

The 3935477 screw is compatible with the G8.3 and QSB5.9 30 CM550 engines. These engines, while distinct in their specifications, share common design elements that allow the use of this screw in similar contexts within their assemblies.

GTA8.3 CM558 and QSL9 G CM558

The GTA8.3 CM558 and QSL9 G CM558 engines also utilize the 3935477 screw. These engines are part of Cummins’ lineup designed for heavy-duty applications, and the screw’s robust design supports the rigorous demands of these high-performance engines.

ISL G CM2180 and L8.9G CMOH2.0 L125B

The ISL G CM2180 and L8.9G CMOH2.0 L125B engines are another pair where the 3935477 screw is employed. These engines are known for their reliability and efficiency, and the screw’s precision engineering ensures it fits seamlessly into their complex assemblies.

X12 CM2350 X119B

Lastly, the X12 CM2350 X119B engine incorporates the 3935477 screw. This engine is designed for specific applications requiring high power output, and the screw’s design supports the engine’s demanding operational conditions.

Role in Engine Systems

The 3935477 Hexagon Flange Head Cap Screw is integral to the assembly and functionality of various engine components. Its design allows for secure fastening, which is essential for maintaining the integrity and performance of the engine system.

Air Cleaner and Air Intake System

In the air cleaner and air intake system, the Hexagon Flange Head Cap Screw is used to secure the air cleaner housing to the engine block or intake manifold. This ensures a tight seal, preventing air leaks that could affect engine performance and fuel efficiency. Additionally, it fastens the air intake components, ensuring they remain in place under the vibrations and stresses of engine operation.

Electronic Control Module (ECM) Wiring Harness

The ECM wiring harness is critical for the communication between various engine components and the ECM. The Hexagon Flange Head Cap Screw is employed to secure the wiring harness to the engine bay, ensuring that the connections remain stable and protected from environmental factors such as moisture and debris. This stability is vital for consistent signal transmission and overall engine management.

Fuel Shutoff Valve Kit

Within the fuel shutoff valve kit, the Hexagon Flange Head Cap Screw plays a role in securing the valve to the fuel line. This ensures that the valve operates correctly, allowing for precise control over the fuel supply to the engine. Proper fastening is essential to prevent fuel leaks and ensure reliable operation of the shutoff mechanism.

Oil Level Gauge

The oil level gauge requires accurate mounting to provide reliable readings of the engine’s oil level. The Hexagon Flange Head Cap Screw is used to secure the gauge to the engine block, ensuring it remains in the correct position and orientation. This is important for maintaining proper lubrication and preventing engine damage due to low oil levels.

Air Fuel Control and Recirculation Systems

In air fuel control and recirculation systems, the Hexagon Flange Head Cap Screw is used to fasten components such as the exhaust gas recirculation (EGR) valve and air fuel ratio sensors. Secure fastening ensures these components function correctly, contributing to efficient combustion and reduced emissions.

Exhaust System

Within the exhaust system, the Hexagon Flange Head Cap Screw is utilized to secure various components, including the exhaust manifold and catalytic converter. This ensures that the exhaust system remains intact, preventing leaks that could lead to increased emissions and reduced engine performance.

Fuel Shutoff Valve

The fuel shutoff valve is a safety component that requires secure mounting to function correctly. The Hexagon Flange Head Cap Screw ensures that the valve is firmly attached to the fuel line, allowing for reliable operation in emergency situations where fuel supply needs to be immediately cut off.

Conclusion

In summary, the 3935477 Hexagon Flange Head Cap Screw is a versatile fastener that contributes to the secure assembly and reliable operation of multiple engine components. Its role in maintaining the structural integrity and functional performance of these systems cannot be overstated.