206326
Twelve Point Cap Screw
Cummins®

The Cummins Twelve Point Cap Screw (Part #206326) is a specialized fastener designed for use in commercial truck maintenance. It plays a role in ensuring the structural integrity and functionality of various truck components. Its unique design and robust construction make it suitable for demanding applications where reliability and durability are paramount ¹.

Basic Concepts and Functionality

A Twelve Point Cap Screw is a type of fastener characterized by its twelve-sided head, which provides a larger contact area compared to standard hex cap screws. This design reduces the risk of cam-out during tightening and offers improved torque application. The mechanical principles behind its design involve distributing force more evenly across the screw head, which enhances grip and reduces the likelihood of stripping or rounding off the head during installation or removal ².

Purpose and Role in Truck Operation

This Cummins part serves specific purposes in commercial trucks, including securing critical components and assemblies. It is commonly used in applications where high torque is required, such as engine mounts, transmission housings, and chassis components. Its role is to provide secure fastening that can withstand the rigors of heavy-duty truck operation, ensuring that components remain firmly in place under various operating conditions ³.

Key Features

The Cummins Twelve Point Cap Screw features a twelve-point design that enhances its performance and durability. It is typically made from high-strength materials, such as alloy steel, to withstand the demanding environments found in commercial trucking. The screw has precise threading specifications to ensure a secure fit and reliable fastening. Additionally, it may have unique attributes such as a corrosion-resistant coating to extend its service life in harsh conditions.

Benefits

The advantages of using the Twelve Point Cap Screw include improved torque application, which allows for more efficient and secure fastening. The reduced risk of cam-out during tightening enhances installation reliability. The enhanced grip provided by the twelve-point design ensures that the screw remains securely fastened, even under high stress. Furthermore, the screw’s resistance to wear and corrosion contributes to its longevity and performance in demanding applications.

Installation and Usage Guidelines

Proper installation of the Twelve Point Cap Screw involves several steps to ensure secure and reliable fastening. Begin by selecting the appropriate screw size and thread pitch for the application. Use a torque wrench to apply the recommended torque specifications, which can be found in the manufacturer’s guidelines. Employ the correct tools, such as a twelve-point socket, to avoid damaging the screw head. Follow best practices, such as lubricating the threads to reduce friction and ensuring that the mating surfaces are clean and free of debris.

Troubleshooting and Maintenance

Common issues associated with Twelve Point Cap Screws include loosening over time due to vibration or thermal expansion, and corrosion in exposed applications. To diagnose problems, inspect the screws regularly for signs of wear, corrosion, or damage. Maintenance procedures to prolong the lifespan of the screws include re-torquing them periodically, applying anti-seize compound to the threads, and protecting them from moisture and contaminants. Replace any screws that show signs of significant wear or damage to maintain optimal performance.

Safety Considerations

When working with Twelve Point Cap Screws, observe safety guidelines and precautions to minimize risks. Handle the screws carefully to avoid injury from sharp edges. Store them in a dry, organized environment to prevent corrosion and damage. Dispose of used or damaged screws properly, following local regulations for metal waste. Ensure that the work area is clean and free of hazards to maintain a safe working environment.

Cummins Overview

Cummins Inc. is a renowned manufacturer with a long-standing reputation in the automotive industry. The company is committed to producing high-quality components for commercial vehicles, including engines, powertrains, and aftermarket parts. Cummins’ dedication to innovation, reliability, and customer satisfaction has established it as a trusted name in the trucking industry, providing solutions that meet the demanding needs of commercial truck operators.

Twelve Point Cap Screw 206326 in Cummins Engines

The Twelve Point Cap Screw 206326, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is utilized across multiple engine series, ensuring secure fastening and stability in different engine configurations.

Engine Series Utilizing 206326

ISM Series:

• ISM CM570
• ISM CM570/870
• ISM CM876
• ISM11 CM876 SN

K Series:

• K19
• K38
• K50

KTA Series:

• KTA38GC CM558

L10 Series:

• L10 CELECT
• L10 GAS
• L10 MECHANICAL

M11 Series:

• M11 CELECT
• M11 CELECT PLUS
• M11 MECHANICAL

N14 Series:

• N14 CELECT
• N14 CELECT PLUS
• N14 MECHANICAL

NH/NT Series:

• NH/NT 855

QSK Series:

• QSK19 CM500
• QSK38 CM2150 MCRS
• QSK38 CM850 MCRS
• QSK50 CM2150 MCRS
• QSK50 CM2350 K108

QSM Series:

• QSM11 CM570

This part is integral to the assembly and maintenance of these engines, providing the necessary strength and durability for secure fastening in various engine components.

Role of Part 206326 Twelve Point Cap Screw in Engine Systems

The Part 206326 Twelve Point Cap Screw is integral to the assembly and securement of various components within engine systems. Its application spans across multiple subsystems, ensuring the structural integrity and operational efficiency of the engine.

Accessories

In the accessories section, the Twelve Point Cap Screw is used to fasten components such as guards and damper shields. These accessories often require robust fastening solutions to withstand vibrations and environmental stresses.

Fuel System

Within the fuel system, the Twelve Point Cap Screw plays a significant role in securing fuel pumps, fuel tubes, and fuel mounting pumps. It ensures that these components remain firmly in place, preventing leaks and maintaining the precise delivery of fuel to the engine.

Alternator and Compressor Mounting

For the alternator and compressor systems, the Twelve Point Cap Screw is employed in the alternator link and various compressor mounting points. This includes components like the compressor mounting air and compressor mtg. These screws ensure that the alternator and compressor are securely attached to the engine, allowing for efficient operation and reduced wear.

EBM Coupling and Fuel Pump Assembly

The EBM (Electric Blower Motor) coupling and fuel pump assemblies also utilize the Twelve Point Cap Screw. Whether it’s the EBM: coupling, fuel pump, or the fuel pump & drive (both customer and EFC variants), these screws provide the necessary tension and security to maintain the alignment and function of these critical components.

Fuel and Water-Wash Pump

In the fuel and water-wash pump systems, the Twelve Point Cap Screw is used in the fuel w w pump and fuel & w-w gov. This ensures that the pump remains securely mounted and operates efficiently, contributing to the overall performance of the engine.

Governor and Fuel Pump Mounting Kit

The governor and fuel pump mounting kit relies on the Twelve Point Cap Screw to secure the components in place. This kit is essential for maintaining the correct fuel delivery and engine governance, ensuring smooth and reliable engine operation.

Plumbing and Fuel Supply

In the plumbing and fuel supply sections, the Twelve Point Cap Screw is used to fasten tube fuel supply and tubing fuel components. This ensures that the fuel lines are securely connected and can withstand the pressures and temperatures involved in fuel delivery.

VT903 Short Block Kit

Finally, in the VT903 short block kit, the Twelve Point Cap Screw is used to secure various components within the short block assembly. This ensures that all parts are correctly aligned and tightly fastened, contributing to the durability and performance of the engine block.

Conclusion

The Cummins Twelve Point Cap Screw (Part #206326) is a vital component in the maintenance and operation of commercial trucks and Cummins engines. Its unique design, robust construction, and reliable performance make it an essential fastener for securing critical components in demanding applications. Proper installation, regular maintenance, and adherence to safety guidelines are crucial for ensuring the longevity and efficiency of this part in various engine systems.