3968466
Twelve Point Cap Screw
Cummins®

The Twelve Point Cap Screw, identified by part number 3968466, is a specialized fastener produced by Cummins, a leading manufacturer in the commercial truck industry. This screw is integral to the maintenance and assembly of heavy-duty trucks, ensuring secure and reliable connections across various components. The part number 3968466 denotes a specific design tailored for the demanding conditions encountered in commercial truck operations.

Basic Concepts of Twelve Point Cap Screws

A Twelve Point Cap Screw is a type of fastener characterized by its twelve-sided head, which provides a greater contact area compared to traditional six-point screws. This design allows for more torque to be applied without the risk of rounding off the head, which is a common issue with six-point fasteners ¹. The twelve-point design also facilitates easier and more precise socket engagement, reducing the likelihood of slippage during installation or removal.

Purpose of the 3968466 Twelve Point Cap Screw in Truck Operation

The 3968466 Twelve Point Cap Screw serves a vital role in the assembly and ongoing function of commercial trucks. It is commonly used in applications where high torque and secure fastening are required, such as in the attachment of engine components, chassis parts, and other critical assemblies. Its design ensures that connections remain tight under the dynamic loads and vibrations experienced by heavy-duty trucks ².

Key Features

The 3968466 Twelve Point Cap Screw is crafted from high-strength materials, typically alloy steel, to withstand the rigors of truck operation. It features a precise thread pitch that ensures optimal engagement with mating components, enhancing the overall security of the fastener. Additionally, the screw may be treated with special coatings to resist corrosion and wear, further contributing to its durability and performance in harsh environments ³.

Benefits

Utilizing the 3968466 Twelve Point Cap Screw offers several advantages over standard cap screws. Its increased torque capacity allows for tighter and more secure connections, while the resistance to stripping ensures longevity and reliability. The enhanced grip provided by the twelve-point design reduces the risk of fastener failure, contributing to the overall safety and efficiency of truck operations.

Installation Guidelines

Proper installation of the 3968466 Twelve Point Cap Screw is crucial for achieving optimal performance. It is recommended to use the appropriate socket tool to engage the screw, ensuring a snug fit without over-tightening. Torque specifications provided by the manufacturer should be adhered to, using a calibrated torque wrench to apply the correct amount of force. Following these guidelines helps to maintain the integrity of the fastener and the components it secures.

Troubleshooting and Maintenance

Common issues with Twelve Point Cap Screws include stripping, corrosion, and loosening over time. Regular inspection of these fasteners is recommended to identify any signs of wear or damage. Maintenance practices such as applying anti-seize compound during installation can help prevent corrosion, while periodic tightening checks ensure that connections remain secure. Replacement of the screw should be considered if significant wear or damage is observed.

Cummins: Manufacturer Overview

Cummins Inc. is a globally recognized leader in the design, manufacture, and distribution of engines and related technologies. With a rich history of innovation and quality, Cummins has established a strong reputation in the commercial truck industry. The company’s commitment to excellence is evident in its wide range of products, including the 3968466 Twelve Point Cap Screw, which embodies Cummins’ dedication to providing reliable and high-performance components for the trucking sector.

Twelve Point Cap Screw 3968466 in Cummins Engines

The Twelve Point Cap Screw 3968466 is a critical component in various Cummins engines, providing essential fastening capabilities across a range of engine models. This screw is designed to secure different parts within the engine, ensuring structural integrity and operational efficiency.

ISC Series Engines

The ISC series engines, including ISC CM2150, ISC CM554, ISC CM850, and ISC8.3 CM2250, utilize the Twelve Point Cap Screw 3968466 in multiple applications. These engines are known for their robust performance and reliability, and the screw plays a vital role in maintaining the alignment and stability of various engine components.

ISL Series Engines

Similarly, the ISL series engines, such as ISL CM2150, ISL CM554, ISL G CM2180, ISL9 CM2150 SN, ISL9 CM2250, and ISL9.5 CM2880 L138, incorporate the Twelve Point Cap Screw 3968466 in their design. These engines are designed for heavy-duty applications, and the screw is essential for securing parts that endure significant stress and movement.

L Series Engines

The L series engines, including L GAS PLUS CM556, L8.9, L8.9 CM2670 L134C, L8.9 L121, L8.9G CMOH2.0 L125B, L9 CM2670 L128B, L9.3 L105, and L9.5 L117, also rely on the Twelve Point Cap Screw 3968466. These engines are engineered for high performance and durability, and the screw is integral to maintaining the precise fit and function of various engine parts.

G Series Engines

The G series engines, such as 6C8.3, C GAS PLUS CM556, C8.3 G, G8.3, G8.3 CM558, GTA8.3 CM558, and L8.9G CMOH2.0 L125B, incorporate the Twelve Point Cap Screw 3968466 in their construction. These engines are designed for specific applications, and the screw ensures that all components are securely fastened, contributing to the overall reliability and efficiency of the engine.

ISZ Series Engine

The ISZ13 CM2150 Z105 engine also utilizes the Twelve Point Cap Screw 3968466. This engine is designed for specialized applications, and the screw is crucial for maintaining the integrity of its components.

Overall, the Twelve Point Cap Screw 3968466 is a fundamental component in a wide range of Cummins engines, ensuring that all parts are securely fastened and the engine operates efficiently.

Role of Part 3968466 Twelve Point Cap Screw in Engine Systems

The part 3968466 Twelve Point Cap Screw is integral in securing various components within engine systems, ensuring stability and proper function.

In the starting motor mounting system, this cap screw plays a significant role in attaching the starting motor securely to its designated position. It ensures that the motor remains firmly in place, allowing for efficient operation and minimizing vibrations during startup.

For the starter motor mounting, the Twelve Point Cap Screw is used to fasten the starter motor to the engine block or transmission. This secure attachment is essential for the reliable engagement of the starter gear with the flywheel, facilitating smooth engine starts.

In the broader context of motor attachments, this cap screw is often employed to connect various motor components, such as the motor housing to the base plate or other structural elements. Its design allows for easy installation and removal, which is beneficial during maintenance or repairs.

Additionally, within the starting system, the Twelve Point Cap Screw is utilized in multiple points where secure fastening is required. This includes attaching the starting motor to the engine frame and ensuring that all electrical connections are held firmly in place.

Overall, the consistent use of the part 3968466 Twelve Point Cap Screw across these applications underscores its importance in maintaining the integrity and functionality of engine systems.

Conclusion

The 3968466 Twelve Point Cap Screw is a critical component in the assembly and maintenance of heavy-duty trucks and Cummins engines. Its unique design, high-strength materials, and precise thread pitch ensure secure and reliable connections under demanding conditions. Proper installation and maintenance practices are essential to maximize the performance and longevity of this Cummins part.