3934054
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3934054, is a component manufactured by Cummins, a leader in the commercial truck industry. This screw is significant in the realm of commercial trucks due to its robust design and reliable performance, contributing to the overall efficiency and safety of truck operations.

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 the material. Within mechanical systems, these screws play a role in securely joining components, ensuring structural integrity and operational stability ¹.

Purpose and Role in Truck Operation

This Cummins part serves a specific purpose in commercial truck operations by fastening critical components and assemblies. It is commonly used in applications where high tensile strength and resistance to vibration are required. This screw supports various systems within the truck, including engine components, chassis parts, and other structural elements, ensuring they remain securely attached under dynamic operating conditions ².

Key Features

The 3934054 features a hexagonal head design that facilitates easy and precise tightening with standard wrenches or sockets. The flange at the base of the screw head provides additional bearing surface, enhancing the screw’s ability to distribute load and resist sinking into softer materials. Additionally, the screw is crafted from high-quality materials, offering excellent durability and corrosion resistance, which are vital for withstanding the harsh environments often encountered in commercial trucking.

Benefits

Utilizing the 3934054 offers several advantages. Its design enhances fastening security, providing a stable and reliable connection between components. The screw’s resistance to vibration helps maintain the integrity of fastenings over time, reducing the need for frequent re-tightening. Furthermore, the ease of installation and removal, thanks to its hexagonal head, simplifies maintenance procedures and reduces downtime for commercial trucks.

Installation and Usage Guidelines

Proper installation of the 3934054 involves several steps to ensure a secure fit. Begin by selecting the appropriate drill bit size for the pilot hole, ensuring it matches the screw’s diameter. Drill the pilot hole into the material, taking care to maintain perpendicular alignment. Insert the screw into the hole and use a wrench or socket to tighten it to the specified torque setting, which can be found in the manufacturer’s guidelines. It is important to avoid over-tightening, as this can lead to damage or stripping of the screw or the material.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws include loosening due to vibration, corrosion, and damage from over-tightening. To identify problems, regularly inspect screws for signs of wear, corrosion, or loosening. Maintenance tips to prolong the lifespan of the screw include applying an anti-seize compound to prevent corrosion and ensuring screws are tightened to the correct torque specification. Replacing screws that show significant wear or damage is also recommended to maintain reliable performance.

Safety Considerations

When handling, installing, and maintaining the 3934054, it is important to follow safety guidelines to prevent accidents. Wear appropriate personal protective equipment, such as gloves and safety glasses, to protect against injury. Use the correct tools for installation and removal to avoid damaging the screw or the surrounding material. Additionally, ensure that all screws are properly tightened to the specified torque to prevent loosening and potential failure.

Cummins Overview

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 has established a reputation for quality, innovation, and reliability in the commercial truck industry. The company’s commitment to excellence is evident in its wide range of products, which are designed to meet the demanding requirements of commercial applications, ensuring optimal performance and durability ³.

Hexagon Flange Head Cap Screw 3934054 in Cummins Engines

The 3934054, manufactured by Cummins, is a critical component used in various Cummins engine models. This part is integral to the assembly and maintenance of these engines, ensuring secure fastening and structural integrity.

Engine Models Utilizing 3934054

6 Series Engines

• 6B5.9
• 6C8.3
• C GAS PLUS CM556
• C8.3 G
• G8.3
• G8.3 CM558
• GTA8.3 CM558
• QSC8.3 CM554
• QSC8.3 CM850 (CM2850)

ISC Series Engines

• ISC CM2150
• ISC CM554
• ISC CM850
• ISC8.3 CM2250

ISL Series Engines

• ISL CM2150
• ISL CM554
• ISL G CM2180
• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

L Series Engines

• L GAS PLUS CM556
• L8.9
• L8.9 L121
• L9.3 L105

QSC and QSL Series Engines

• QSC9 CM2250 / QSL9 CM2250
• QSL9 CM2250

The 3934054 screw is designed to fit seamlessly into the specified engine models, providing a reliable fastening solution that meets the stringent demands of engine assembly and operation. Its use across a variety of Cummins engines underscores its versatility and importance in maintaining engine performance and durability.

Role of Part 3934054 Hexagon Flange Head Cap Screw in Engine Systems

In the intricate architecture of engine systems, the 3934054 serves as a vital fastening element. Its application spans across various components, ensuring the structural integrity and efficient operation of the engine.

Turbocharger Assembly

Within the turbocharger assembly, the Hexagon Flange Head Cap Screw is employed to secure the compressor and turbine housings. This fastening ensures that the components remain aligned and sealed, which is essential for maintaining the turbocharger’s efficiency and durability. The screw’s design allows for easy installation and removal, facilitating routine maintenance and repairs.

Fuel System Components

In the fuel system, particularly at the fuel filter and pump locations, the Hexagon Flange Head Cap Screw plays a significant role. It is used to attach the fuel filter housing, ensuring a leak-proof seal that prevents fuel contamination and maintains system pressure. Similarly, at the fuel pump, the screw secures the pump housing, contributing to the stability and reliability of fuel delivery to the engine.

Expansion Tank and Cooling System

The expansion tank, a component of the cooling system, utilizes the Hexagon Flange Head Cap Screw to attach the tank to the engine block or radiator. This secure attachment is vital for managing the coolant volume fluctuations, which occur due to temperature changes, thereby maintaining optimal engine temperature and preventing overheating.

Filter Housings

Across various filter housings, including air and oil filters, the Hexagon Flange Head Cap Screw is instrumental in ensuring a tight seal. This seal is crucial for the effective filtration of contaminants, which is essential for the longevity and performance of the engine.

Water Pump and Related Components

In the water pump and associated components, the Hexagon Flange Head Cap Screw is used to secure the pump housing and impeller. This securement is essential for the efficient circulation of coolant throughout the engine, which is paramount for thermal management and engine protection.

General Application

Beyond specific components, the Hexagon Flange Head Cap Screw is widely used throughout engine systems for its versatility and reliability. Its application in securing brackets, covers, and other ancillary components underscores its importance in maintaining the overall structural integrity and operational efficiency of the engine.

Conclusion

The 3934054 Hexagon Flange Head Cap Screw is a critical component in the commercial truck and engine industry, offering robust fastening solutions that enhance the efficiency, safety, and reliability of truck operations. Its design, featuring a hexagonal head and flanged base, ensures easy installation, secure fastening, and resistance to vibration and corrosion. Proper installation, regular maintenance, and adherence to safety guidelines are essential for maximizing the performance and lifespan of this Cummins part. Its widespread use across various Cummins engine models highlights its versatility and importance in maintaining engine performance and durability.