3973470
Hexagon Flange Head Cap Screw
Cummins®

Introduction

The Hexagon Flange Head Cap Screw, identified by part number 3973470, is a component manufactured by Cummins, a well-established name in the commercial truck industry. This screw is significant in the realm of truck maintenance due to its robust design and reliable performance. Cummins, known for its commitment to quality and innovation, produces this screw to meet the demanding requirements of commercial truck operations.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and a flange beneath the head. The hexagonal head allows for efficient tightening and loosening using a wrench, while the flange provides a larger bearing surface that distributes the load more evenly across the fastened material. In a truck’s mechanical system, this screw plays a role in securely fastening components, ensuring they remain in place under various operational stresses ¹.

Purpose and Role in Truck Operation

The 3973470 Hexagon Flange Head Cap Screw is utilized in various applications within commercial trucks. It is commonly employed in the fastening of engine components, chassis parts, and other critical assemblies where secure and durable fastening is required. Its design ensures that it can withstand the vibrations and stresses inherent in truck operations, maintaining the integrity of the fastened components ².

Key Features

The 3973470 Hexagon Flange Head Cap Screw features a hexagonal head that facilitates easy and precise tightening with a wrench. The flange beneath the head increases the bearing surface area, which helps in distributing the load more effectively and reducing the risk of the screw pulling through the fastened material. Made from high-quality materials, this screw offers excellent resistance to corrosion and wear, contributing to its durability and long service life ³.

Benefits

Using the 3973470 Hexagon Flange Head Cap Screw in truck maintenance offers several advantages. Its design enhances fastening security, providing a reliable connection between components. The screw’s resistance to vibration ensures that fastenings remain secure under dynamic conditions. Additionally, the hexagonal head and flange design facilitate ease of installation and removal, making maintenance tasks more efficient.

Installation and Usage Guidelines

For the correct installation of the 3973470 Hexagon Flange Head Cap Screw, it is important to follow specific guidelines. Proper torque settings should be applied to ensure the screw is tightened to the manufacturer’s specifications, which helps in achieving optimal performance and longevity. Using the appropriate tools and techniques during installation is crucial to avoid over-tightening or under-tightening, both of which can lead to fastening issues.

Troubleshooting and Maintenance

Common issues with the 3973470 Hexagon Flange Head Cap Screw may include loosening due to vibration or corrosion. Regular inspections are recommended to identify any signs of wear or damage. Maintenance practices such as applying a thread locker can help prevent loosening, and replacing screws that show signs of significant wear or corrosion is advisable to ensure continued reliable operation.

Cummins: Manufacturer Overview

Cummins is a renowned manufacturer in the commercial truck industry, with a history of producing high-quality automotive components. The company is recognized for its commitment to innovation and excellence, providing solutions that meet the rigorous demands of truck operations. Cummins’ reputation is built on its dedication to quality, reliability, and customer satisfaction, making it a trusted name among professionals in the field.

Application in Cummins Engines

4B3.9 and B4.5 Engines

The 3973470 screw is integral in the assembly of the 4B3.9 and B4.5 engines. These engines are known for their robust performance and are commonly used in a variety of applications, from agricultural machinery to industrial equipment. The Hexagon Flange Head Cap Screw is used to secure various engine components, ensuring that they remain tightly fastened under operational stresses. This helps maintain the structural integrity of the engine and prevents potential failures due to loosening.

QSB3.9 and 30 CM550 Engines

In the QSB3.9 and 30 CM550 engines, the 3973470 screw plays a critical role in the engine’s assembly and maintenance. These engines are often utilized in heavy-duty applications, such as construction equipment and generators, where reliability and performance are paramount. The screw’s design allows it to withstand high torque and pressure, making it suitable for the demanding environments these engines operate in.

Importance of the Hexagon Flange Head Cap Screw

The use of the 3973470 screw in these engines highlights its importance in ensuring the longevity and efficiency of the engine. The screw’s flange head provides a larger surface area for the application of torque, which is crucial for maintaining tight connections. Additionally, the hexagon shape allows for easy and efficient tightening with a wrench or socket, facilitating quick assembly and disassembly during maintenance procedures.

Role of Part 3973470 Hexagon Flange Head Cap Screw in Engine Systems

The part 3973470 Hexagon Flange Head Cap Screw is integral in securing various components within engine systems. Its design allows for a robust connection, ensuring that parts remain firmly in place under the dynamic conditions of engine operation.

Manifold Assembly

In the manifold assembly, the Hexagon Flange Head Cap Screw is used to fasten the manifold to the engine block. This secure attachment is essential for maintaining the integrity of the manifold, which directs the air-fuel mixture into the combustion chambers. Proper fastening prevents leaks and ensures efficient airflow, contributing to optimal engine performance.

Air Intake System

Within the air intake system, this screw plays a role in attaching the air intake components to the engine. It secures the air filter housing and other intake components, ensuring a sealed and stable connection. This is important for maintaining the correct air-fuel ratio and preventing any disruptions in airflow that could affect engine efficiency.

Mounting Components

For mounting various engine components, the Hexagon Flange Head Cap Screw provides a reliable fastening solution. Whether securing the engine to the chassis or attaching auxiliary components like sensors and brackets, its flange head design offers additional surface area for a stronger hold. This is particularly beneficial in high-vibration environments typical of engine operation.

Oil Pan and Oil System

In the oil pan and broader oil system, this screw is utilized to attach the oil pan to the engine block. A secure attachment is vital for maintaining the structural integrity of the oil pan, which houses the engine’s lubricant. It also ensures that the oil pan remains sealed, preventing oil leaks that could lead to engine damage. Additionally, it may be used in securing oil filters and other oil system components, ensuring they remain in place during operation.

General Pan Attachments

Beyond specific engine components, the Hexagon Flange Head Cap Screw is often employed in attaching various pans and covers within the engine bay. This includes securing transmission pans, valve covers, and other protective enclosures. Its robust design ensures these components stay firmly in place, protecting internal mechanisms and maintaining the overall structural integrity of the engine system.

Conclusion

The Cummins part number 3973470, a Hexagon Flange Head Cap Screw, is a vital component in the assembly and maintenance of the 4B3.9, B4.5, QSB3.9, and 30 CM550 engines. Its design and material ensure that it can withstand the operational stresses of these engines, contributing to their overall reliability and performance.