3279354
Hexagon Head Cap Screw
Cummins®

The Cummins Hexagon Head Cap Screw (Part #3279354) is a specialized fastener designed for use in heavy-duty truck applications. It is integral to the maintenance and operation of these vehicles, providing secure fastening solutions that contribute to the overall reliability and performance of truck components.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of bolt characterized by its hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. The design of the cap screw ensures a snug fit and reduces the likelihood of slippage during installation. Cap screws are widely used across various industries for their strength and reliability in fastening applications ¹.

Purpose and Role in Truck Operation

This Cummins part plays a specific role in the operation and maintenance of heavy-duty trucks. It is typically used in applications where secure and durable fastening is required, such as in the attachment of critical components or in the assembly of truck frames and chassis. Its design ensures that it can withstand the rigors of heavy-duty use, providing a reliable fastening solution ².

Key Features

The Hexagon Head Cap Screw features a robust material composition, typically high-strength steel, which enhances its durability and resistance to wear. It has a fine or coarse thread type, depending on the application, and its hexagonal head design allows for easy and secure tightening. Additionally, the screw may have special coatings or treatments to improve corrosion resistance and further enhance its performance in demanding environments ³.

Benefits

Using this part in truck applications offers several benefits. Its high strength ensures that it can securely hold components together under significant stress. The design of the screw also provides resistance to loosening, which is crucial in dynamic environments like those encountered in heavy-duty truck operation. Furthermore, the hexagonal head allows for ease of installation and removal, facilitating maintenance procedures.

Installation Guidelines

Proper installation of the Hexagon Head Cap Screw involves several steps to ensure secure fastening. Begin by cleaning the mating surfaces to remove any debris or contaminants. Use the appropriate wrench or socket to tighten the screw to the specified torque, which ensures that the fastener is neither over-tightened nor under-tightened. Follow best practices for tightening, such as using a torque wrench and adhering to the manufacturer’s guidelines for torque specifications.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws include loosening over time and corrosion. To troubleshoot these issues, regularly inspect the screws for signs of wear or damage. If a screw appears loose, re-tighten it to the specified torque. To prevent corrosion, apply a suitable lubricant or coating, and ensure that the mating surfaces are clean and free of contaminants. Regular maintenance will help prolong the life of the screw and ensure continued reliable performance.

Safety Considerations

When working with Hexagon Head Cap Screws, it is important to observe several safety considerations. Use the correct tools for installation and removal to avoid damage to the screw or surrounding components. Apply torque carefully to prevent over-tightening, which can lead to stripping or breakage. Additionally, wear appropriate personal protective equipment (PPE), such as gloves and safety glasses, to protect against injury during installation and maintenance procedures.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and commitment to quality, Cummins plays a significant role in the automotive and heavy-duty truck industry. The company’s dedication to producing high-quality components, such as the Hexagon Head Cap Screw, underscores its reputation for reliability and performance in demanding applications.

Hexagon Head Cap Screw 3279354 in Cummins Engines

The Cummins Hexagon Head Cap Screw part number 3279354 is a versatile component that finds applications across a variety of Cummins engine models. This screw is designed to provide robust fastening solutions, ensuring secure connections in critical engine assemblies.

6B5.9 and 6C8.3 Engines

In the 6B5.9 and 6C8.3 engines, the 3279354 screw is often used in various mounting and fastening applications. These engines, known for their reliability and performance, benefit from the precision and strength of this cap screw in securing components such as engine blocks, covers, and brackets.

B5.9 G and B5.9 GAS PLUS CM556 Engines

For the B5.9 G and B5.9 GAS PLUS CM556 engines, the 3279354 screw plays a role in maintaining the integrity of the engine’s structural components. Its use in these engines ensures that parts such as the cylinder head and intake manifold are securely fastened, contributing to the engine’s overall durability and efficiency.

C GAS PLUS CM556 Engine

In the C GAS PLUS CM556 engine, the 3279354 screw is employed in several key areas. Its application in fastening critical components helps maintain the engine’s structural integrity and operational efficiency, ensuring that the engine performs reliably under various conditions.

ISB CM550 and ISB CM850 Engines

The ISB CM550 and ISB CM850 engines utilize the 3279354 screw in numerous fastening applications. These engines, known for their power and efficiency, benefit from the screw’s ability to provide secure and reliable connections in areas such as the engine block, cylinder head, and various auxiliary systems.

ISL9 CM2150 SN and ISL9.5 CM2880 L138 Engines

In the ISL9 CM2150 SN and ISL9.5 CM2880 L138 engines, the 3279354 screw is used to secure a variety of components, including engine blocks, covers, and brackets. Its use in these engines ensures that all parts are tightly fastened, contributing to the engine’s overall performance and longevity.

ISM CM570, ISM CM570/870, and ISM CM876 Engines

The ISM CM570, ISM CM570/870, and ISM CM876 engines also rely on the 3279354 screw for critical fastening applications. This screw helps maintain the structural integrity of these engines by securely fastening components such as the engine block, cylinder head, and various other parts.

L8.9, L8.9 CM2670 L134C, and L8.9G CMOH2.0 L125B Engines

In the L8.9, L8.9 CM2670 L134C, and L8.9G CMOH2.0 L125B engines, the 3279354 screw is used in several key areas to ensure secure fastening of components. Its application in these engines helps maintain the structural integrity and operational efficiency of the engine.

QSL8.9 CM2150 L141 and QSL9 CM850 (CM2850) Engines

Finally, the QSL8.9 CM2150 L141 and QSL9 CM850 (CM2850) engines utilize the 3279354 screw in various fastening applications. This screw helps secure critical components, ensuring that the engine operates reliably and efficiently.

Role of Part 3279354 Hexagon Head Cap Screw in Engine Systems

Part 3279354, the Hexagon Head Cap Screw, is integral to the secure assembly and reliable operation of various engine components. Its application spans across multiple systems, ensuring that each part functions cohesively within the engine’s complex network.

Alternator Mounting

In alternator mounting applications, the Hexagon Head Cap Screw is used to firmly attach the alternator to its bracket. This secure fastening is essential for maintaining the alternator’s alignment and stability, which in turn ensures consistent power generation and reduces the risk of electrical issues stemming from a misaligned alternator.

Cylinder Head Leak Test Kit and Tester

When integrating the cylinder head leak test kit and tester, the Hexagon Head Cap Screw plays a role in securing the test apparatus to the cylinder head. This secure attachment is vital for obtaining accurate leak test results, as any movement or instability could lead to false readings and misdiagnosis of cylinder head conditions.

Drive and Alternator Systems

Within the drive and alternator systems, the Hexagon Head Cap Screw is employed to fasten components that are subject to significant vibrational forces. Its robust design ensures that these parts remain firmly in place, preventing loosening over time which could lead to inefficient operation or complete failure of the drive or alternator systems.

General Mounting Applications

Across various mounting applications, the Hexagon Head Cap Screw provides a dependable solution for attaching engine components to their respective mounts. Whether securing an alternator, a drive component, or parts of a leak test kit, this screw ensures that each component is held in the correct position, contributing to the overall stability and efficiency of the engine system.

Conclusion

The Cummins Hexagon Head Cap Screw (Part #3279354) is a critical component in the maintenance and operation of heavy-duty trucks and Cummins engines. Its robust design, high strength, and reliable performance make it an essential fastener for securing critical components across various engine systems. Proper installation, regular maintenance, and adherence to safety guidelines ensure the continued reliability and efficiency of these components in demanding applications.