3867147
Twelve Point Cap Screw
Cummins®

The 3867147 Twelve Point Cap Screw, manufactured by Cummins, is a specialized fastener designed for use in commercial truck applications. This part ensures structural integrity and performance by securely fastening various components within the truck’s structure. Its design and material composition are tailored to withstand the demanding conditions encountered in heavy-duty truck operations ¹.

Basic Concepts of Twelve Point Cap Screws

A Twelve Point Cap Screw features twelve sides instead of the traditional six found on hex cap screws. This design allows for a more even distribution of torque and reduces the likelihood of cam-out, where the fastener rounds off due to excessive torque. The twelve-point design also provides a greater contact area between the wrench and the screw, enhancing grip and reducing the risk of stripping. The threading on these screws is typically designed to provide a strong, secure hold, ensuring that components remain firmly attached under various operational stresses ².

Purpose and Role in Truck Operation

The 3867147 Twelve Point Cap Screw serves a specific purpose in commercial trucks by fastening critical components that require high levels of durability and resistance to loosening. It contributes to the overall operation and maintenance of truck components by providing a secure attachment point that can withstand the vibrations and stresses inherent in truck operations. This ensures that components remain in place and function correctly, which is vital for the safe and efficient operation of the vehicle ³.

Key Features

The 3867147 Twelve Point Cap Screw boasts several key features that enhance its functionality and durability. Its twelve-point design offers improved torque application and reduced cam-out compared to traditional hex cap screws. The material composition of the screw is selected to provide high strength and resistance to corrosion, ensuring longevity in harsh operating environments. Additionally, the screw may feature unique attributes such as a special coating or threading pattern that further enhances its performance ¹.

Benefits

Using the 3867147 Twelve Point Cap Screw in truck applications offers several benefits. The improved torque application allows for more efficient and secure fastening, while the reduced cam-out minimizes the risk of damage during installation or removal. The enhanced grip provided by the twelve-point design ensures a more secure hold, and the increased resistance to stripping prolongs the lifespan of the fastener. These attributes contribute to the overall reliability and performance of the truck ².

Installation Considerations

Proper installation of the 3867147 Twelve Point Cap Screw is vital to ensure a secure and lasting fit. Guidelines for installation may include specific torque specifications to avoid over-tightening, which can lead to stripping, or under-tightening, which can result in loosening. Recommended tools for installation might include a twelve-point socket wrench to ensure a proper fit and reduce the risk of cam-out. Following these guidelines helps to maintain the integrity of the fastener and the components it secures ³.

Troubleshooting and Maintenance

Common issues associated with Twelve Point Cap Screws can include loosening due to vibrations, corrosion in harsh environments, or damage from improper installation. Troubleshooting steps may involve checking for proper torque application, inspecting for signs of corrosion, and ensuring that the screw is compatible with the application. Maintenance tips to prolong the lifespan of the screw include regular inspection for signs of wear or corrosion, and re-torquing as necessary to maintain a secure fit. These practices help to ensure continued reliable performance of the fastener ¹.

Cummins Overview

Cummins Inc. is a well-established manufacturer with a strong reputation in the commercial truck industry. The company has a history of innovation and commitment to quality in manufacturing truck components. Cummins’ dedication to producing reliable and high-performance parts is evident in their range of products, including the 3867147 Twelve Point Cap Screw. This commitment ensures that truck operators can rely on Cummins components for durability, performance, and longevity in their vehicles ³.

Role of Part 3867147 Twelve Point Cap Screw in Engine Systems

The 3867147 Twelve Point Cap Screw is integral to the assembly and maintenance of various engine components. Its design allows for secure fastening, which is essential for the reliable operation of engine systems.

Camshaft Assembly

In the camshaft assembly, the Twelve Point Cap Screw ensures that the camshaft is firmly attached to the engine block or cylinder head. This secure attachment is vital for maintaining the precise alignment and timing of the camshaft, which directly influences the engine’s performance and efficiency ¹.

Gasket Coupling Kits

For the 2008 and 2009 gasket coupling kits, the Twelve Point Cap Screw plays a role in sealing and securing the gaskets in place. Proper sealing is necessary to prevent leaks and ensure that the engine operates within optimal parameters. The screw’s design allows for easy tightening and removal, facilitating efficient maintenance and replacement of gaskets ².

Performance Parts

When integrating performance parts into an engine, the Twelve Point Cap Screw is often used to secure high-stress components. Its robust design ensures that these parts remain firmly in place under extreme conditions, contributing to the overall performance and durability of the engine ³.

Service Coupling Assemblies

In the service coupling 2008 and 2009 assemblies, the Twelve Point Cap Screw is used to fasten components that connect different parts of the engine. This secure fastening is essential for the smooth transfer of power and the integrity of the engine’s operation ¹.

Short Block Kit

Within a short block kit, the Twelve Point Cap Screw is employed to attach various components such as the crankshaft, pistons, and connecting rods. Its reliable fastening capability ensures that these critical elements remain securely in place, contributing to the engine’s stability and performance ².

Conclusion

The 3867147 Twelve Point Cap Screw is a vital component in the assembly and maintenance of various Cummins engines. Its unique design and robust construction ensure secure fastening in high-stress environments, contributing to the overall reliability and performance of the engine. Proper installation and maintenance of this part are essential to ensure the longevity and efficiency of the engine systems it supports ³.