3934659
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3934659 and manufactured by Cummins, is a vital component in the realm of commercial trucks. Cummins, a renowned name in the industry, produces this screw to meet the demanding requirements of heavy-duty applications. This part is integral to ensuring the structural integrity and operational efficiency of various truck components.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and a flange—a flat, circular plate—attached to the underside of the head. This design allows for secure fastening and provides a larger surface area to distribute the load, reducing the risk of the screw pulling through the material. In mechanical systems, these screws are used to join components securely, ensuring stability and reliability under stress ¹.

Purpose and Role in Truck Operation

The 3934659 Hexagon Flange Head Cap Screw plays a significant role in the operation of commercial trucks by securing critical components. It is commonly used in applications where high tensile strength and resistance to vibration are required. These screws are found in engine mounts, transmission housings, and various chassis components, where they help maintain the alignment and integrity of these parts under dynamic conditions ².

Key Features

The 3934659 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance. Its hexagonal head design allows for easy tightening and loosening using a wrench, ensuring precise torque application. The flange provides additional surface area, which helps in distributing the load more evenly and preventing the screw from pulling through the material. Additionally, the screw is made from high-quality materials, offering excellent durability and resistance to corrosion.

Benefits

Using the 3934659 Hexagon Flange Head Cap Screw offers several advantages. Its robust design ensures high durability, making it suitable for heavy-duty applications. The flange enhances resistance to vibration, which is crucial in the dynamic environment of a commercial truck. Furthermore, the hexagonal head allows for straightforward installation and removal, facilitating maintenance and repair processes.

Installation Process

Proper installation of the 3934659 Hexagon Flange Head Cap Screw is vital for ensuring optimal performance and longevity. Begin by ensuring the mating surfaces are clean and free of debris. Use a torque wrench to tighten the screw to the manufacturer’s specified torque settings to avoid over-tightening, which can lead to stripping, or under-tightening, which can result in loose connections. It is also advisable to apply a thread locker to prevent the screw from loosening due to vibrations.

Troubleshooting and Maintenance

Common issues with the 3934659 Hexagon Flange Head Cap Screw include loosening due to vibrations and corrosion. Regular inspections should be conducted to check for any signs of wear or damage. If corrosion is detected, the affected area should be cleaned, and an anti-corrosive coating should be applied. In cases where the screw has loosened, it should be re-tightened to the specified torque settings. If significant damage is observed, replacement may be necessary to ensure continued reliable performance.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration systems, and related technologies. With a history spanning over a century, Cummins has established a strong reputation for quality, reliability, and innovation in the commercial truck industry. The company’s extensive product range and commitment to excellence make it a preferred choice for heavy-duty applications ³.

Compatibility with Cummins Engines

The Hexagon Flange Head Cap Screw, part number 3934659, manufactured by Cummins, is a versatile component designed to fit a variety of Cummins engines. This screw is engineered to provide a secure fastening solution, ensuring the integrity and stability of engine components.

B5.9 Series Engines

• B5.9 G
• B5.9 GAS PLUS CM556

The Hexagon Flange Head Cap Screw is compatible with the B5.9 series engines, including both the standard B5.9 G and the B5.9 GAS PLUS CM556. This screw is ideal for securing various engine components, ensuring reliable performance and durability.

ISB/ISD Series Engines

• ISB/ISD4.5 CM2150 B119
• ISB3.9 CM2220 B107
• ISB5.9G CM2180
• ISBE4 CM850

The ISB/ISD series engines, ranging from the ISB/ISD4.5 CM2150 B119 to the ISB5.9G CM2180, benefit from the use of the Hexagon Flange Head Cap Screw. This screw is designed to withstand the rigors of these engines, providing a robust fastening solution for critical engine components.

ISF Series Engines

• ISF3.8 CM2220 AN
• ISF3.8 CM2220 F103
• ISF4.5 CM2220 F123

The ISF series engines, including the ISF3.8 CM2220 AN, ISF3.8 CM2220 F103, and ISF4.5 CM2220 F123, are also compatible with the Hexagon Flange Head Cap Screw. This screw ensures that engine components remain securely fastened, contributing to the overall reliability and performance of these engines.

QSB/QSC/QSK/QSL/QST Series Engines

• QSB3.9 CM2880 B138
• QSC9 CM2250/QSL9 CM2250
• QSK60 CM850 MCRS
• QSL9 CM2250
• QSL9 CM2350 L102
• QST30 CM2350 T101

The QSB/QSC/QSK/QSL/QST series engines, such as the QSB3.9 CM2880 B138 and the QSL9 CM2350 L102, are designed to work seamlessly with the Hexagon Flange Head Cap Screw. This screw is essential for maintaining the structural integrity of these engines, ensuring that all components are securely fastened and functioning optimally.

Role of Part 3934659 Hexagon Flange Head Cap Screw in Engine Systems

Part 3934659, the Hexagon Flange Head Cap Screw, is integral in securing various components within engine systems, ensuring stability and efficiency. Its application spans across multiple critical areas:

Turbocharger Arrangement

In turbocharger setups, the Hexagon Flange Head Cap Screw is used to fasten the turbocharger to the engine block or manifold. This secure attachment is vital for maintaining the turbocharger’s alignment and operational integrity, directly influencing the engine’s performance and efficiency.

Exhaust Outlet and Manifold Connection

The screw plays a significant role in connecting the exhaust outlet to the manifold. This connection must be robust to withstand high temperatures and pressures, ensuring a leak-free seal that contributes to the engine’s overall efficiency and emission control.

Connection Support in Plumbing and Heat Shielding

Within the engine’s plumbing system, particularly in raw water pump arrangements, the Hexagon Flange Head Cap Screw is employed to secure connections. It ensures that the plumbing remains intact under varying pressures, which is essential for the cooling system’s reliability. Additionally, in heat shielding applications, the screw helps in securing shields around high-temperature components, protecting adjacent parts from heat damage and ensuring the engine’s longevity.

General Application Across Engine Components

Across various engine components, the Hexagon Flange Head Cap Screw is a go-to fastening solution due to its strength and reliability. Whether securing connections, supporting arrangements, or ensuring the integrity of shields and plumbing, its role is fundamental in maintaining the structural and operational integrity of engine systems.

Conclusion

The 3934659 Hexagon Flange Head Cap Screw is a critical component in the operation and maintenance of commercial trucks and Cummins engines. Its robust design, ease of installation, and resistance to vibration and corrosion make it an essential part for securing various engine components. Proper installation and regular maintenance are key to ensuring the longevity and reliability of this Cummins part.