3349015
Hexagon Head Cap Screw
Cummins®

The 3349015 Hexagon Head Cap Screw, manufactured by Cummins, is a vital component in the maintenance and operation of commercial trucks. Cummins, a well-established name in the automotive industry, is renowned for its commitment to quality and innovation. This particular screw is designed to meet the rigorous demands of heavy-duty applications, ensuring reliable performance and durability in various 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. The hexagonal design prevents the tool from slipping off the screw head, providing a secure grip and enabling precise torque application. This design is particularly advantageous in high-stress environments where consistent and reliable fastening is required ¹.

Purpose of the 3349015 Hexagon Head Cap Screw in Truck Operation

This Cummins part plays a significant role in the assembly and maintenance of commercial trucks. It is commonly used in applications where strong, durable fastening is necessary. Examples include securing engine components, attaching body panels, and fastening various structural elements. Its robust design ensures that critical parts remain securely in place, contributing to the overall safety and efficiency of the vehicle.

Key Features

The 3349015 Hexagon Head Cap Screw boasts several key features that make it suitable for heavy-duty applications. It is typically made from high-strength steel, ensuring durability and resistance to wear. The screw features a fine or coarse thread, depending on the specific application, allowing for versatile use in different truck components. Additionally, it may be coated with a protective layer to enhance corrosion resistance, further extending its lifespan in harsh operating conditions ².

Benefits

Using this Cummins part offers several benefits. Its high-strength material composition ensures it can withstand significant loads and stresses, making it ideal for commercial truck applications. The screw’s resistance to corrosion helps maintain its integrity over time, even in challenging environments. Furthermore, the hexagonal head design allows for easy installation and removal using standard tools, simplifying maintenance procedures.

Installation Guidelines

Proper installation of the 3349015 Hexagon Head Cap Screw is crucial for ensuring secure fastening. Begin by cleaning the mating surfaces to remove any debris or contaminants. Use a torque wrench to apply the recommended torque specifications, which can typically be found in the vehicle’s maintenance manual or on the packaging. It is important to avoid over-tightening, as this can damage the screw or the components being fastened. Following these guidelines will help achieve a secure and lasting connection.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws include loosening over time due to vibration or thermal expansion, and corrosion in exposed applications. 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. In cases of corrosion, consider replacing the screw with a coated variant to prevent further degradation. Regular maintenance and timely replacement of worn screws will help ensure the continued reliable performance of the truck.

Cummins: Manufacturer Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Founded in 1919, Cummins has a long-standing reputation for quality, innovation, and customer satisfaction. The company is committed to advancing technology and sustainability in the automotive industry, providing reliable components that meet the demanding needs of commercial vehicle operators. Cummins’ dedication to excellence is evident in their wide range of products, including the 3349015 Hexagon Head Cap Screw ³.

Application in Cummins Engines

QSB4.5 CM850 (CM2850) and QSL9 CM850 (CM2850)

This part is utilized in the QSB4.5 CM850 (CM2850) and QSL9 CM850 (CM2850) engines. These engines are part of Cummins’ QSB and QSL series, known for their reliability and performance in various industrial and agricultural applications. The screw is integral in securing various engine components, ensuring the integrity of the engine’s structure and function.

QSL8.9 CM2150 L141

In the QSL8.9 CM2150 L141 engine, this Cummins part plays a crucial role in maintaining the engine’s assembly. This engine is part of the QSL series, which is designed for heavy-duty applications. The screw’s robust design ensures that it can withstand the high stresses and operational demands of this engine model.

K38 and K50

The part number 3349015 is also compatible with the K38 and K50 engines. These engines are known for their versatility and are used in a range of applications, from construction equipment to marine vessels. The Hexagon Head Cap Screw is essential in these engines for securing various parts, contributing to the overall durability and performance of the engine.

Importance of the Hexagon Head Cap Screw

This part is a vital component in Cummins engines due to its ability to provide a strong and reliable fastening solution. Its design allows for easy installation and removal, which is crucial during maintenance and repair operations. The screw’s material and construction ensure it can handle the operational stresses and environmental conditions that Cummins engines often encounter.

Role of Part 3349015 Hexagon Head Cap Screw in Engine Systems

This part is integral to the assembly and secure functioning of various components within engine systems. Its applications span across multiple critical areas, ensuring the structural integrity and operational efficiency of the engine.

Engine Cooling System

In the engine cooling system, the Hexagon Head Cap Screw is employed to fasten components such as the heat exchanger, manifold, and water pump. It secures the heat exchanger mounting, ensuring that the heat exchanger remains firmly in place, facilitating efficient heat dissipation from the engine. Similarly, it is used in the manifold to maintain the structural integrity of the manifold housing, which is essential for directing coolant flow.

Hose and Tube Mounting

The screw is also pivotal in securing hose mounts and plain mounts. It ensures that hoses and tubes, such as the raw water hose and seawater pipe, are tightly fastened to their respective mounts. This is vital for preventing leaks and ensuring a consistent flow of coolant or seawater through the system.

Sea Water Pump and Tube Mounting

In the sea water pump mounting and sea water tube mounting, the Hexagon Head Cap Screw plays a significant role. It secures the pump to its base, ensuring that the pump operates efficiently without any undue movement. Additionally, it fastens the sea water tube mounting, which is crucial for the proper transfer of seawater to the engine cooling system.

Water Transfer and Bypass

The screw is utilized in the water transfer tubes and water bypass tube mountings. It ensures that these tubes are securely attached to their mounts, facilitating the smooth transfer of water within the engine cooling system. This is essential for maintaining the engine’s temperature within optimal ranges.

Water Inlet and Elbow Mounting

Finally, the Hexagon Head Cap Screw is used in the water inlet connection mounting and water tube and elbow mounting. It secures these components, ensuring that the water inlet and elbows are firmly in place, which is essential for the efficient operation of the engine cooling system.

Conclusion

Overall, the 3349015 Hexagon Head Cap Screw is a fundamental component in the assembly and secure functioning of various engine system components, contributing to the overall efficiency and reliability of the engine.