3945231
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, specifically part #3945231 manufactured by Cummins, plays a significant role in the assembly and maintenance of commercial trucks. This screw is designed to provide secure fastening in various truck systems, ensuring components remain firmly in place under operational stress.

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 to distribute load and prevent the screw from sinking into softer materials. These screws are commonly made from materials such as steel or stainless steel, chosen for their strength and resistance to corrosion. In the automotive industry, they are used to secure a wide range of components, from engine parts to chassis elements ¹.

Functionality

The Hexagon Flange Head Cap Screw operates by threading into a pre-drilled hole in the components it is meant to secure. Once tightened, the screw exerts clamping force, holding the components together. The flange at the base of the screw helps to distribute the load across a larger area, reducing the risk of the screw pulling through the material. This design also aids in transmitting torque effectively, ensuring that the fastened components remain securely in place during operation ².

Role in Truck Operation

Part #3945231 by Cummins is specifically designed for use in commercial truck applications. It plays a role in various truck systems, including the engine, transmission, and chassis. By securely fastening critical components, this screw helps maintain the structural integrity and operational efficiency of the truck. Its applications range from attaching engine covers to securing transmission components, highlighting its versatility and importance in truck maintenance and assembly.

Key Features

The 3945231 Hexagon Flange Head Cap Screw features a hexagonal head that allows for easy and precise torque application. The flange at the base of the screw provides additional stability and load distribution, preventing the screw from sinking into the material. Made from high-quality materials, this screw offers durability and resistance to corrosion, ensuring long-term performance in demanding truck environments.

Benefits

Using the 3945231 Hexagon Flange Head Cap Screw offers several advantages. Its durable construction and resistance to corrosion make it suitable for long-term use in harsh truck environments. The flange design enhances stability and load distribution, reducing the risk of component failure. Additionally, the hexagonal head allows for straightforward installation and removal, facilitating efficient truck maintenance and repair processes.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws include loosening due to vibration and corrosion. Regular inspection and tightening can help prevent these issues. If corrosion is detected, replacing the screw with a new one made from corrosion-resistant material is recommended. Proper torque application during installation is crucial to ensure the screw remains securely fastened without over-tightening, which could damage the components or the screw itself.

About Cummins

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 renowned for its commitment to quality and innovation in the commercial truck industry. The company offers a wide range of products designed to meet the demanding requirements of truck operators, emphasizing durability, efficiency, and reliability in all its offerings.

Hexagon Flange Head Cap Screw (Part 3945231) in Cummins Engines

The Hexagon Flange Head Cap Screw, identified by part number 3945231, is a critical component in various Cummins engines. This screw is designed to provide a secure fastening solution, ensuring that parts remain tightly connected under operational stresses. The following Cummins engines utilize this screw in their assembly:

ISC Series

• ISC CM2150
• ISC8.3 CM2250

ISL Series

• ISL CM2150
• ISL CM554
• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

QSC/QSL Series

• QSC9 CM2250/QSL9 CM2250
• QSL8.9 CM2150 L141
• QSL9 CM2250
• QSL9 CM2350 L102
• QSL9 CM850 (CM2850)

The Hexagon Flange Head Cap Screw is integral to the assembly and maintenance of these engines, ensuring that various components are fastened securely. Its use across multiple engine series highlights its versatility and importance in maintaining engine integrity.

Role of Part 3945231 Hexagon Flange Head Cap Screw in Engine Systems

In the context of engine systems, the part 3945231 Hexagon Flange Head Cap Screw is instrumental in ensuring the secure assembly and operation of various components.

Engine Brake (12V) Kit

Within the engine brake (12V) kit, this screw is utilized to fasten critical components that contribute to the effective functioning of the engine braking system. It ensures that the components remain firmly in place, allowing for consistent and reliable performance of the braking mechanism. The screw’s design helps in distributing the load evenly, reducing the risk of component failure under stress.

Engine Brake Kit

In a standard engine brake kit, the Hexagon Flange Head Cap Screw plays a significant role in securing the brake components. Its flange head provides additional surface area for torque application, which is essential for maintaining the integrity of the brake system. This ensures that the brake components operate smoothly and efficiently, contributing to the overall safety and performance of the engine.

Rocker Lever

The rocker lever, a pivotal component in the valve train of an engine, relies on the Hexagon Flange Head Cap Screw for secure attachment to the engine block or cylinder head. This screw ensures that the rocker lever remains in the correct position, allowing for precise valve operation. The flange head of the screw prevents it from sinking into the softer materials, maintaining a stable connection.

Rocker Lever Assembly

In the rocker lever assembly, the Hexagon Flange Head Cap Screw is used to fasten the rocker lever to the assembly base. This secure attachment is vital for the synchronized movement of the valves, which is essential for the engine’s combustion process. The screw’s design ensures that the assembly remains intact under the high stresses and vibrations experienced during engine operation.

Conclusion

The 3945231 Hexagon Flange Head Cap Screw by Cummins is a vital component in the assembly and maintenance of commercial trucks and engines. Its robust design, characterized by a hexagonal head and flanged base, ensures secure fastening and efficient torque application. The screw’s durability and resistance to corrosion make it ideal for long-term use in demanding environments. Regular maintenance and proper torque application are essential to maximize its performance and longevity.