3900619
Hexagon Head Cap Screw
Cummins®

The Hexagon Head Cap Screw, part number 3900619, manufactured by Cummins, is a specialized fastener designed for use in commercial trucks. Cummins, a well-established name in the commercial truck industry, produces a range of components that ensure the reliability and efficiency of truck operations. This part is integral to various fastening applications within these vehicles, contributing to the secure assembly and maintenance of truck components.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of fastener characterized by its hexagonal head, which allows for efficient tightening and loosening using standard tools such as wrenches or sockets. Mechanically, it functions by converting torque applied to the head into clamping force, which holds components together securely. These screws are commonly used in applications requiring a high degree of fastening strength and reliability ¹.

Purpose of the 3900619 Hexagon Head Cap Screw in Truck Operation

This Cummins part plays a role in the assembly and maintenance of commercial trucks by providing secure fastening in various components. It is used in applications where strong, durable fastening is required, such as in engine components, chassis assemblies, and other critical areas of the truck. Its design ensures that components remain securely attached under the demanding conditions encountered in commercial truck operations.

Key Features of the 3900619 Hexagon Head Cap Screw

The 3900619 is designed with specific features to enhance its performance and durability. It has a precise thread pitch that ensures optimal engagement with mating components, a hexagonal head that allows for easy and efficient tightening, and is made from high-grade materials that offer resistance to wear and corrosion. These design elements contribute to its reliability and longevity in commercial truck applications ².

Benefits of Using the 3900619 Hexagon Head Cap Screw

This part offers several advantages for commercial truck applications. Its durable construction ensures long-term reliability, while its resistance to loosening helps maintain secure fastening over time. Additionally, the hexagonal head design allows for easy installation and removal using standard tools, making it a practical choice for both assembly and maintenance tasks.

Installation Guidelines

Proper installation of the 3900619 is important for ensuring secure fastening and longevity. To install, align the screw with the designated hole, and use a wrench or socket to tighten it to the recommended torque specification. It is important to avoid over-tightening, which can damage the screw or the components being fastened. Regular inspection and maintenance can help ensure the screw remains in good condition and continues to perform effectively.

Maintenance and Troubleshooting

Maintaining the 3900619 involves regular inspection for signs of wear or damage, such as corrosion or loosening. If any issues are detected, the screw should be replaced to ensure continued secure fastening. Troubleshooting common issues, such as loosening or corrosion, may involve re-tightening the screw or applying a corrosion-resistant coating. Following manufacturer guidelines for maintenance can help extend the life of the screw and ensure reliable performance.

Cummins: Manufacturer Overview

Cummins Inc. is a leading manufacturer in the commercial truck industry, known for its wide range of high-quality components and systems. With a history of innovation and excellence, Cummins has established a strong reputation for producing reliable and efficient products. The company’s product range includes engines, transmissions, and various components designed to enhance the performance and durability of commercial trucks. Cummins’ commitment to quality and customer satisfaction has made it a trusted name in the industry ³.

Hexagon Head Cap Screw 3900619 Compatibility with Cummins Engines

The Cummins part number 3900619, a Hexagon Head Cap Screw, is a versatile component that can be utilized across a variety of Cummins engine models. This screw is designed to provide secure fastening in various applications, ensuring the integrity and functionality of the engine’s components.

Common Rail Diesel Engines

• 4B3.9
• 6B5.9
• B3.3
• ISC CM554
• ISL CM554
• ISM CM570
• ISM11 CM876 SN
• QSC8.3 CM554
• QSL9 CM554
• QSM11 CM570

These engines, which are part of Cummins’ Common Rail Diesel (CRD) lineup, benefit from the precision and reliability of the 3900619 screw. This part is often used in applications requiring robust fastening solutions, such as securing engine covers, brackets, and other critical components.

Natural Gas Engines

• L10 GAS

The L10 GAS engine, designed for natural gas operation, also incorporates the 3900619 screw. This engine’s unique requirements for durability and performance in a natural gas environment are well-supported by the screw’s design.

Mechanical Fuel Injection Engines

• L10 MECHANICAL
• M11 MECHANICAL
• N14 MECHANICAL

These engines, which use mechanical fuel injection systems, also utilize the 3900619 screw. The screw’s ability to provide a strong and reliable fastening solution is crucial in maintaining the structural integrity of these engines.

Electronic Fuel Injection Engines

• L10 CELECT
• M11 CELECT
• M11 CELECT PLUS

The electronic fuel injection (EFI) engines in the Cummins lineup, including the L10 CELECT, M11 CELECT, and M11 CELECT PLUS, also incorporate the 3900619 screw. This part is essential in applications where precise fastening is required to ensure the proper operation of the engine’s electronic systems.

Role of Part 3900619 Hexagon Head Cap Screw in Engine Systems

The part 3900619 Hexagon Head Cap Screw is integral to the secure assembly and operation of various engine components. Its application spans across multiple systems, ensuring the integrity and efficiency of the engine’s performance.

Fuel System Integration

In the fuel system, the Hexagon Head Cap Screw is employed in the fuel drain mounting and fuel line kit to ensure a tight and leak-proof connection. It secures the fuel filter in place, preventing any displacement that could lead to fuel leaks or inefficient fuel delivery. Additionally, it plays a role in the fuel pump plumbing and fuel tubing, where secure fastening is essential to maintain consistent fuel pressure and flow.

Cooling and Heating Systems

For the coolant heater starting system, the screw ensures that the heater components are firmly mounted, allowing for efficient heat transfer without the risk of component dislodgement. In the plumbing turbocharger coolant system, it secures connections, ensuring coolant flows smoothly to manage turbocharger temperatures effectively.

Emission Control

In the emissions rebuild kit, the Hexagon Head Cap Screw is used to secure various components, ensuring that emission control devices function correctly and meet regulatory standards. Its role in the valve fuel shutoff system is to provide a secure connection, preventing any unintended fuel release that could affect emission levels.

Turbocharger Systems

Within the turbocharger repair kit, the screw is vital for securing turbocharger components, ensuring they operate under the precise conditions required for optimal performance. It is also used in the plumbing turbocharger oil system to maintain secure oil lines, which are critical for lubricating moving parts within the turbocharger.

Electrical and Instrumentation

The screw finds its place in securing the resistor corrosion within the electrical system, ensuring stable electrical connections. In the mounting instrument panel, it provides the necessary stability for accurate readings and control.

Mechanical and Structural Components

For mechanical components such as the front gear, intake manifold connection, and valve spring compressor, the Hexagon Head Cap Screw ensures that these parts are securely fastened, contributing to the overall structural integrity and operational efficiency of the engine.

Additional Applications

The screw is also utilized in the service tool kit for securing tools and components during maintenance procedures, ensuring safety and efficiency. In the manifold pressure system, it secures connections, ensuring accurate pressure readings for engine management systems.

Conclusion

The Hexagon Head Cap Screw, part 3900619, is a versatile fastener that plays a significant role in the secure assembly and efficient operation of various engine systems. Its application across fuel, cooling, emission, turbocharger, electrical, and mechanical components underscores its importance in maintaining engine performance and reliability.