3679102
Twelve Point Cap Screw
Cummins®

The Twelve Point Cap Screw, Part #3679102, 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 contribute to the efficiency and reliability of truck operations. This particular cap screw is integral to various mechanical assemblies within commercial trucks, ensuring secure and durable connections.

Basic Concepts of Twelve Point Cap Screws

A Twelve Point Cap Screw is a type of fastener that features twelve points along its head, as opposed to the six points found on standard hex cap screws. This design allows for a greater contact area between the screw and the driving tool, which can enhance torque application and reduce the risk of cam-out—a situation where the tool slips off the screw head ¹. Twelve Point Cap Screws are commonly used in applications requiring high torque and resistance to loosening, making them suitable for heavy-duty mechanical assemblies.

Purpose and Role in Truck Operation

The Twelve Point Cap Screw Part #3679102 plays a specific role in the operation of commercial trucks by providing secure fastening in areas subjected to significant stress and vibration. It is often used in critical assemblies where the integrity of the connection is paramount to the overall functionality and reliability of the truck’s components. By ensuring a tight and stable connection, this cap screw contributes to the safe and efficient operation of the vehicle ².

Key Features

The Twelve Point Cap Screw Part #3679102 is characterized by several key features that enhance its performance in heavy-duty applications. Its twelve-point design allows for improved torque application and reduced cam-out risk. The screw is typically made from high-strength materials, ensuring durability under high stress conditions. Additionally, it may feature a corrosion-resistant coating to protect against environmental factors, extending its service life in demanding applications ³.

Benefits

Using the Twelve Point Cap Screw Part #3679102 offers several benefits. The enhanced torque application capability ensures that connections are tightened to the required specifications, reducing the likelihood of loosening over time. The reduced risk of cam-out during installation and removal contributes to safer and more efficient maintenance procedures. Furthermore, the durability and corrosion resistance of the screw ensure long-term performance, even in harsh operating conditions ⁴.

Installation Considerations

Proper installation of the Twelve Point Cap Screw Part #3679102 is crucial for its performance and longevity. It is recommended to use the appropriate torque specifications provided by the manufacturer to ensure the screw is tightened to the correct level. Utilizing the right tools, such as a twelve-point socket, can further enhance the installation process by providing a secure fit and reducing the risk of damage to the screw head.

Troubleshooting and Maintenance

Common issues with Twelve Point Cap Screws may include loosening due to vibration or corrosion. Regular inspection and maintenance can help identify and address these issues before they lead to more significant problems. If a screw shows signs of corrosion or damage, it should be replaced to maintain the integrity of the assembly. Additionally, ensuring that all connections are properly torqued during maintenance can prevent loosening and extend the lifespan of the fastener.

Cummins: Manufacturer Overview

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 truck industry. The company’s commitment to excellence is reflected in its product range, which is designed to meet the demanding requirements of commercial truck operations.

Twelve Point Cap Screw 3679102 Compatibility with Cummins Engines

The Twelve Point Cap Screw part number 3679102, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is designed to provide secure fastening in applications where high torque and durability are essential. Below is a detailed look at how this part fits within the specified Cummins engine lineup.

ISX Series Engines

• ISX CM570
• ISX CM870
• ISX CM871

The Twelve Point Cap Screw 3679102 is utilized in the ISX series engines, which are known for their robust performance and reliability. This screw is integral in securing various engine components, ensuring that they remain tightly fastened under operational stresses.

ISX15 Series Engines

• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101

In the ISX15 series engines, the 3679102 screw is employed to maintain the integrity of the engine’s structural components. Its twelve-point design allows for efficient torque application, which is crucial for the high-performance demands of these engines.

QSX15 Series Engines

• QSX15 CM2250
• QSX15 CM2250 ECF
• QSX15 CM2350 X105

The QSX15 series engines also benefit from the use of the Twelve Point Cap Screw 3679102. This screw is used in various applications within these engines, ensuring that all fastened parts remain secure during operation.

X15 Series Engines

• X15 CM2350 X116B
• X15 CM2350 X123B
• X15 CM2450 X134B

In the X15 series engines, the 3679102 screw is a key component in maintaining the engine’s structural integrity. Its design allows for effective fastening, which is vital for the performance and longevity of these engines.

Role of Part 3679102 Twelve Point Cap Screw in Engine Systems

The part 3679102 Twelve Point Cap Screw is instrumental in securing various components within engine systems, ensuring optimal performance and reliability.

In the assembly of the connecting rod and piston, this cap screw plays a significant role in fastening the connecting rod to the piston. This secure attachment is essential for the smooth transfer of force from the piston to the crankshaft, which is fundamental for the engine’s operation.

When it comes to the engine piston, the Twelve Point Cap Screw is often used to secure piston pins or other critical attachments. This ensures that the piston remains stable and operates efficiently within the cylinder, contributing to the engine’s overall performance.

For the injector, the cap screw is utilized to fasten the injector to the engine block or cylinder head. This secure fitting is vital for maintaining the precise fuel delivery required for combustion, directly impacting the engine’s efficiency and power output.

In the realm of performance parts, the Twelve Point Cap Screw is commonly employed to attach aftermarket components such as upgraded connecting rods, pistons, or custom injectors. Its robust design ensures that these high-performance parts remain firmly in place, even under extreme conditions, thereby enhancing the engine’s capabilities.

Conclusion

The Twelve Point Cap Screw Part #3679102 is a critical component in the operation and maintenance of commercial trucks and Cummins engines. Its unique design, high-strength materials, and corrosion-resistant properties make it an ideal choice for applications requiring secure and durable fastening. Proper installation and regular maintenance are essential to ensure the longevity and performance of this part, contributing to the overall reliability and efficiency of the vehicle.