3919864
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3919864, is a component manufactured by Cummins, a well-established name in the automotive and heavy-duty truck industry. This screw is significant in the realm of commercial truck maintenance due to its robust design and reliable performance. Cummins, known for its commitment to quality and innovation, produces this screw to meet the demanding requirements of truck components ¹.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flange. The hexagonal head allows for efficient torque application using standard tools, while the flange provides a larger bearing surface that helps distribute load more evenly. In the context of truck components, this screw is used to secure various parts, ensuring they remain firmly in place under operational stress ².

Purpose and Role in Truck Operation

The 3919864 Hexagon Flange Head Cap Screw plays a specific role in the operation and maintenance of commercial trucks. It is applied in areas where secure fastening is required to maintain structural integrity and performance. This includes securing engine components, chassis parts, and other critical assemblies. The screw’s design ensures that it can withstand significant stress and vibration, which are common in truck operations ³.

Key Features

The 3919864 Hexagon Flange Head Cap Screw boasts several key features that contribute to its functionality and durability. Its hexagonal head design allows for easy and precise tightening using common tools. The flange characteristic provides an increased surface area that enhances load distribution and reduces the risk of the screw pulling through the material. Additionally, the screw is made from high-quality materials that offer resistance to corrosion and wear, ensuring long-term reliability.

Benefits

Using the 3919864 Hexagon Flange Head Cap Screw in truck maintenance offers several benefits. The design of the screw enhances fastening security, making it less likely to loosen over time, even under vibration. Its ease of installation and removal simplifies maintenance procedures, reducing downtime. The material properties of the screw contribute to its durability, ensuring it can withstand the harsh conditions typical in commercial truck environments.

Installation and Usage

Proper installation of the 3919864 Hexagon Flange Head Cap Screw is vital to ensure optimal performance and longevity. It is important to follow torque specifications provided by the manufacturer to avoid over-tightening, which can lead to damage, or under-tightening, which can compromise security. Best practices include using the correct tools and ensuring the mating surfaces are clean and free from debris to achieve a proper fit.

Troubleshooting and Maintenance

Common issues with the 3919864 Hexagon Flange Head Cap Screw may include loosening or corrosion. Regular inspections can help identify these problems early. If loosening is detected, re-tightening to the specified torque is recommended. In cases of corrosion, cleaning the affected area and applying a suitable anti-corrosive treatment can help. Maintenance tips include periodic checks for tightness and condition, ensuring the screw continues to perform reliably.

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 is renowned for its commitment to quality, innovation, and customer satisfaction. The company offers a wide range of products designed to meet the needs of various industries, including automotive, construction, and agriculture. Cummins’ dedication to excellence is evident in its comprehensive product range and ongoing investment in research and development.

Hexagon Flange Head Cap Screw 3919864 Compatibility with Cummins Engines

The Hexagon Flange Head Cap Screw part number 3919864, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is integral in securing components within the engine assembly, ensuring that parts remain tightly fastened and properly aligned.

ISB Series Engines

• ISB CM550
• ISB CM850
• ISB3.9 CM2220 B107
• ISB5.9 CM2880 B127

The ISB series engines benefit from the use of the 3919864 screw in various applications, including securing engine covers, manifolds, and other critical components.

QSB Series Engines

• QSB3.9 30 CM550
• QSB3.9 CM2880 B138
• QSB5.9 30 CM550
• QSB5.9 44 CM550
• QSB5.9 CM2880 B139
• QSB5.9 CM550
• QSB6.7 CM2250
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

The QSB series engines also utilize the 3919864 screw in numerous applications. This includes securing various engine parts such as the cylinder head, intake manifold, and exhaust systems.

Other Cummins Engines

• 4B3.9
• 6B5.9
• 6C8.3
• B4.5
• B5.9 CM2670 B166C
• B5.9 G
• B6.7 CM2670 B164C
• B6.7S
• C GAS PLUS CM556
• QSC8.3 CM850 (CM2850)

The 3919864 screw is also compatible with a range of other Cummins engines, including the 4B3.9, 6B5.9, and 6C8.3. It is used in securing various engine components, ensuring the integrity and performance of the engine.

This screw is engineered to meet the stringent requirements of Cummins engines, providing durability and reliability in demanding conditions.

Role of Part 3919864 Hexagon Flange Head Cap Screw in Engine Systems

The part 3919864 Hexagon Flange Head Cap Screw is integral to the assembly and securement of various components within engine systems. Its application spans across multiple subsystems, ensuring robust connections and reliable performance.

Aftercooler and Air Heater Starting

In the aftercooler and air heater starting systems, the Hexagon Flange Head Cap Screw is used to fasten critical components. It secures the aftercooler to the engine frame, ensuring efficient cooling of the compressed air. Similarly, in the air heater starting system, it plays a role in mounting the heater elements, which are essential for cold-start performance.

Air Intake and Turbocharger Systems

For the air intake connection and turbocharger arrangement, this screw is employed to mount the air intake manifold to the engine block. It also secures the turbocharger to the engine, maintaining the integrity of the air flow path and ensuring optimal turbocharger performance.

Fuel Plumbing and Injector System

In the fuel plumbing and injector system, the Hexagon Flange Head Cap Screw is utilized to secure fuel lines and injectors. This ensures a leak-free connection, which is vital for the precise delivery of fuel to the combustion chamber.

Ignition System

Within the ignition system, this screw is used to mount ignition components, such as coils and distributors, to the engine block. This securement is essential for maintaining the electrical integrity and reliability of the ignition system.

Alternator and Engine Installation

The Hexagon Flange Head Cap Screw is also pivotal in the mounting of the alternator to the engine. It ensures a stable and vibration-resistant connection, which is crucial for the alternator’s efficient operation and longevity.

Overall Engine Mounting and Plumbing

Finally, in the overall engine installation and plumbing, this screw is used extensively to secure various engine mounts, brackets, and plumbing connections. Its role in these applications ensures the engine remains securely mounted and all fluid lines are properly connected, contributing to the engine’s overall stability and performance.

Conclusion

The 3919864 Hexagon Flange Head Cap Screw is a critical component in the maintenance and operation of Cummins engines. Its robust design, ease of installation, and reliable performance make it an essential part for securing various engine components. Proper installation and regular maintenance are key to ensuring the longevity and efficiency of this Cummins part.