4940194
Hexagon Flange Head Cap Screw
Cummins®

Introduction

This article provides an overview of the Hexagon Flange Head Cap Screw, part number 4940194, manufactured by Cummins. It covers the basic concepts, purpose, key features, benefits, and maintenance suggestions for this component, which is used in commercial trucks.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by a hexagonal head and a flanged base. The hexagonal head allows for easy tightening and loosening using a wrench, while the flange provides additional surface area for distribution of clamping force. These screws are commonly used in applications requiring secure and durable fastening ¹.

Purpose and Function

The 4940194 Hexagon Flange Head Cap Screw by Cummins is designed for use in commercial trucks. It plays a role in securing various components and assemblies within the truck’s structure. This screw ensures that parts remain firmly attached, contributing to the overall integrity and safety of the vehicle ².

Key Features

• Hexagonal head for wrench accessibility.
• Flanged base for enhanced clamping force distribution.
• High-quality material construction for durability.
• Designed to meet the demanding requirements of commercial truck applications.

Benefits

• Provides a secure and reliable fastening solution.
• Distributes clamping force effectively, reducing the risk of component loosening.
• Constructed from high-quality materials to withstand harsh operating conditions.
• Enhances the overall structural integrity of the truck.

Troubleshooting and Maintenance

Regular inspection of the Hexagon Flange Head Cap Screw is recommended to ensure it remains in good condition. Signs of wear, corrosion, or loosening should be addressed promptly. Maintenance practices may include tightening the screw to the manufacturer’s specified torque, replacing damaged screws, and ensuring that mating surfaces are clean and free of debris ³.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a strong reputation for quality and reliability, Cummins serves commercial, industrial, and transportation markets worldwide.

Hexagon Flange Head Cap Screw 4940194 in Cummins Engines

The Cummins part number 4940194, a Hexagon Flange Head Cap Screw, is integral to the assembly and maintenance of various Cummins engine models. This screw is designed to secure components within the engine, ensuring structural integrity and operational efficiency. Here’s how it fits into different Cummins engine configurations:

B Series Engines

• 6B5.9
• B4.5 CM2350 B129B
• ISB4.5 CM2350 B104

The Hexagon Flange Head Cap Screw 4940194 is used in B series engines to fasten various components, including those that require a secure and reliable connection. Its flange head design provides a larger bearing surface, distributing the load more evenly and preventing damage to the fastened parts.

D Series Engines

• D4.0 CM2620 D103B

In the D4.0 CM2620 D103B engine, the screw is utilized to secure critical components, ensuring that parts remain tightly fastened under operational stresses. The flange head allows for easier torque application and removal, facilitating maintenance tasks.

F Series Engines

• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

The F series engines, including models F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F3.8 F102, F4.5 CM2620 F139B, and F4.5 CM2620 F141C, all incorporate the 4940194 screw to fasten various engine components. The screw’s design ensures that these parts are held securely, which is crucial for the engine’s performance and longevity.

ISF Series Engines

• ISF3.8 CM2220 AN
• ISF3.8 CM2220 F103
• ISF3.8 CM2350 F109
• ISF4.5 CM2220 F123

In the ISF series engines, the 4940194 screw is used to fasten components that require a robust and reliable connection. The flange head design provides a larger surface area for torque application, which is essential for maintaining the integrity of the engine’s components.

QSF Series Engines

• QSF3.8 CM2350 F107
• QSF3.8 CM2880 F112

The QSF series engines, including the QSF3.8 CM2350 F107 and QSF3.8 CM2880 F112, also utilize the 4940194 screw to secure various parts. The screw’s design ensures that these components are held firmly in place, contributing to the overall reliability and performance of the engine.

Role of Part 4940194 Hexagon Flange Head Cap Screw in Engine Systems

The part 4940194 Hexagon Flange Head Cap Screw is an essential fastening component utilized in various engine systems to ensure secure and reliable connections between different parts. Its design and functionality contribute significantly to the overall performance and durability of the engine.

Camshaft Assembly

In the camshaft assembly, the Hexagon Flange Head Cap Screw is used to fasten the camshaft to the cylinder head. This secure attachment is vital for maintaining the precise alignment and operation of the camshaft, which controls the opening and closing of the engine’s valves. Proper fastening ensures that the camshaft operates smoothly, contributing to efficient valve timing and overall engine performance.

Connecting Rod and Piston

Within the connecting rod and piston assembly, the Hexagon Flange Head Cap Screw plays a role in securing the connecting rod to the crankshaft. This connection is fundamental for transmitting the reciprocating motion of the pistons to the rotational motion of the crankshaft. A secure fastening here ensures that the forces generated during combustion are effectively transferred, enhancing the engine’s power output and reliability.

Cylinder Head and Head

The cylinder head, which houses the combustion chamber, valves, and often the fuel injectors, relies on the Hexagon Flange Head Cap Screw to maintain a tight seal with the engine block. This seal is essential for preventing leaks and ensuring that the combustion process is contained within the cylinder. A well-fastened cylinder head contributes to optimal compression and efficient combustion, directly impacting the engine’s performance and fuel efficiency.

Injector Plumbing

In the injector plumbing system, the Hexagon Flange Head Cap Screw is used to secure fuel injectors to the cylinder head. This ensures that the injectors are properly aligned and sealed, allowing for precise fuel delivery into the combustion chamber. Secure fastening here is important for maintaining fuel system integrity, which is crucial for achieving the desired air-fuel mixture and maximizing engine performance.

General Engine Parts

Across various engine parts, the Hexagon Flange Head Cap Screw is employed to fasten components such as brackets, covers, and other ancillary parts. These connections are important for maintaining the structural integrity of the engine, ensuring that all parts remain in their intended positions under the high stresses and vibrations experienced during operation.

Performance Implications

The consistent and reliable use of the Hexagon Flange Head Cap Screw throughout the engine system contributes to enhanced performance. By ensuring that all critical components are securely fastened, the screw helps maintain the engine’s structural integrity, operational efficiency, and longevity. This, in turn, supports the engine’s ability to deliver consistent power output, improved fuel efficiency, and reduced wear and tear on internal components.

Conclusion

The 4940194 Hexagon Flange Head Cap Screw by Cummins is a critical component in the assembly and maintenance of commercial truck engines. Its design, featuring a hexagonal head and flanged base, ensures secure and reliable fastening, contributing to the overall performance and durability of the engine. Regular maintenance and inspection of this part are essential to ensure the continued integrity and efficiency of the engine system.