3093749
Hexagon Head Cap Screw
Cummins®

The Cummins 3093749 Hexagon Head Cap Screw is a specialized fastener designed for use in commercial trucks. Cummins, a well-established name in the commercial vehicle industry, produces a range of components that ensure the reliability and efficiency of truck operations. This particular screw is integral to various truck systems, providing secure fastening in demanding environments.

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. These screws are commonly used in mechanical assemblies to secure components together. The hexagonal shape of the head provides a firm grip, reducing the risk of cam-out during installation or removal. The cap, or the underside of the head, typically features a countersunk design that sits flush with or below the surface of the material being fastened, promoting a smooth finish and reducing the likelihood of snagging ¹.

Purpose of the 3093749 Hexagon Head Cap Screw in Truck Operation

This Cummins part plays a role in the operation and maintenance of commercial trucks by securing critical components across various systems. Its applications range from fastening engine parts to securing chassis components and other structural elements. The screw ensures that these components remain firmly in place, even under the dynamic loads and vibrations experienced during truck operation ².

Key Features

The 3093749 is distinguished by several key features that enhance its performance and durability. Its hexagonal head design allows for reliable tightening and loosening, while the countersunk cap provides a smooth surface finish. The screw is made from high-strength materials, typically alloy steel, which offers excellent resistance to wear and corrosion. The threading on the screw is precision-cut to ensure a secure fit and optimal load distribution. Additionally, the screw may feature a zinc or other protective coating to further enhance its resistance to environmental factors ³.

Benefits

Using the 3093749 offers several benefits. The secure fastening provided by the hexagonal head reduces the risk of loosening over time, which is particularly important in the high-vibration environment of a commercial truck. The material composition and protective coating contribute to the screw’s longevity, even in harsh operating conditions. Additionally, the precision threading ensures that the screw can withstand significant loads without failing, contributing to the overall reliability of the truck’s systems ⁴.

Installation and Usage

Proper installation of the 3093749 is vital to ensure secure and effective fastening. The recommended torque specifications should be followed to avoid over-tightening, which can lead to stripping, or under-tightening, which can result in loosening. Appropriate tools, such as a torque wrench, should be used to achieve the correct torque. Best practices include cleaning the mating surfaces before installation to remove any debris that could affect the screw’s grip, and periodically checking the tightness of the screw to ensure it remains secure.

Troubleshooting and Maintenance

Common issues with the 3093749, such as loosening or corrosion, can often be addressed through regular maintenance. Periodically checking the screw’s tightness and reapplying torque as necessary can prevent loosening. If corrosion is detected, the affected area should be cleaned, and a corrosion-resistant coating may be applied to prevent further degradation. Regular inspections and maintenance can prolong the service life of the screw and ensure continued reliable performance.

Safety Considerations

When handling and installing the 3093749, several safety practices should be observed. Wearing appropriate personal protective equipment, such as gloves and safety glasses, can prevent injury. Ensuring that the work area is clean and free of obstacles can reduce the risk of accidents. Following the recommended torque specifications and using the correct tools are also important safety measures to prevent injury and ensure proper function.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration systems, and aftermarket parts. With a history spanning over a century, Cummins has established a reputation for quality, innovation, and reliability in the commercial vehicle industry. The company’s commitment to excellence is reflected in its extensive product range and its focus on meeting the needs of its customers through continuous improvement and technological advancement.

Hexagon Head Cap Screw 3093749 in Cummins Engines

The Cummins Hexagon Head Cap Screw part number 3093749 is a critical component in several Cummins engine models, ensuring structural integrity and proper assembly. This screw is utilized in the following engines:

• QSK19 CM2350 K105
• QSK19 CM2350 K114

These engines, part of the Cummins QSK19 series, are known for their robust design and reliability in various industrial applications. The Hexagon Head Cap Screw 3093749 plays a vital role in securing various engine components, ensuring that the assembly remains tight and stable under operational stresses.

Additionally, this screw is also used in:

• QST30 CM2350 T101
• QST30 CM552

The QST30 series engines, including the CM2350 T101 and CM552 models, benefit from the precision and strength of the 3093749 screw. This part is integral in maintaining the alignment and fastening of engine parts, contributing to the overall performance and longevity of the engine.

In these engines, the Hexagon Head Cap Screw 3093749 is typically employed in areas where high torque and durability are essential, such as in the engine block, cylinder heads, and other critical assemblies. Its design ensures a secure fit and resistance to loosening, which is crucial for the safe and efficient operation of the engines.

Role of Part 3093749 Hexagon Head Cap Screw in Engine Systems

The 3093749 is integral to the assembly and maintenance of various engine systems. Its primary function is to secure components, ensuring they remain in place under operational stress.

In the cooler system, this screw is often used to fasten the cooler housing to the engine block, maintaining the structural integrity of the cooling system.

For the engine oil system, it plays a role in securing the oil pan to the engine, ensuring a sealed environment for the oil to circulate without leaks.

Within the drive system, the screw is employed to attach drive components, such as pulleys or brackets, ensuring they are firmly in place to transfer power efficiently.

In the fuel pump assembly, it is used to secure the pump housing, ensuring it remains stable during operation, which is essential for consistent fuel delivery.

For the filter systems, whether it’s a full flow oil filter or a general filter, the screw is utilized to attach the filter housing, ensuring a secure fit that prevents oil or fuel leaks.

In the lubricating oil system, it secures components like oil galleries or passages, ensuring the lubricant is distributed effectively throughout the engine.

The fuel injection pump relies on this screw to secure its housing, ensuring precise fuel injection timing and pressure.

In the fuel supply plumbing, the screw is used to attach fittings and connectors, ensuring a leak-free fuel supply line.

For the module and engine control systems, it secures electronic components, ensuring they are protected from vibrations and remain operational.

In the electronic engine systems, it is used to fasten sensors or control units, ensuring they are accurately positioned for optimal performance.

Within the plumbing systems, such as the aftercooler water plumbing or general fuel supply plumbing, the screw secures pipes and fittings, ensuring a sealed and efficient flow of fluids.

Lastly, in the pump and fuel systems, it is used to secure pump components and fuel lines, ensuring they are firmly in place for reliable operation.

Conclusion

The Cummins 3093749 Hexagon Head Cap Screw is a critical component in the operation and maintenance of commercial trucks and Cummins engines. Its design, featuring a hexagonal head and countersunk cap, ensures secure fastening and resistance to loosening, even in high-vibration environments. Made from high-strength materials and often coated for corrosion resistance, this screw plays a vital role in securing various engine components, contributing to the overall reliability and performance of the engine systems. Proper installation, regular maintenance, and adherence to safety practices are essential to maximize the screw’s effectiveness and longevity.