205354
Twelve Point Cap Screw
Cummins®

The Cummins Twelve Point Cap Screw, identified by part number 205354, is a specialized fastener designed for heavy-duty truck applications. It plays a significant role in ensuring the structural integrity and performance of trucks by securely fastening critical components. Its unique design and robust construction make it a reliable choice for the demanding conditions encountered in heavy-duty trucking ¹.

Basic Concepts and Functionality

Twelve point cap screws are engineered with a distinct design that sets them apart from traditional hex cap screws. The twelve-point design provides a greater number of engagement points, which enhances grip during installation and removal. This design reduces the risk of cam-out, a common issue with hex cap screws where the tool slips off the fastener. The threading on twelve point cap screws is precision-cut to ensure a secure fit and optimal torque transmission. This design allows for more consistent and reliable fastening, which is crucial in applications where components are subjected to significant stress and vibration ².

Purpose and Role in Truck Operation

In heavy-duty truck applications, the Cummins Twelve Point Cap Screw serves a specific purpose: to securely fasten critical components and maintain structural integrity under various operating conditions. These fasteners are used in areas where alignment and secure attachment are paramount, such as in engine mounts, transmission housings, and chassis components. By ensuring that these components remain firmly in place, the Cummins Twelve Point Cap Screw contributes to the overall performance, safety, and reliability of the truck ³.

Key Features

The Cummins Twelve Point Cap Screw boasts several key features that enhance its performance and durability. It is typically made from high-strength materials, such as alloy steel, which provides excellent resistance to corrosion and wear. The thread pitch is designed to offer a balance between ease of installation and secure fastening. Torque specifications are precisely defined to ensure that the fastener is tightened to the correct level, preventing over-tightening or under-tightening. Additionally, the unique twelve-point design offers improved grip and reduced risk of stripping, making it a superior choice for heavy-duty applications ⁴.

Benefits

The benefits of using the Cummins Twelve Point Cap Screw are numerous. Its improved grip and reduced risk of cam-out during installation and removal make it a more reliable fastener compared to traditional hex cap screws. The enhanced torque transmission ensures that components are securely fastened, which is vital for maintaining structural integrity. Furthermore, the resistance to corrosion and wear prolongs the lifespan of the fastener, contributing to the overall reliability and longevity of the truck. These benefits collectively enhance truck performance and reduce the need for frequent maintenance ⁵.

Troubleshooting and Maintenance

Common issues that may arise with twelve point cap screws include loosening, corrosion, or damage. To address these issues, it is important to follow proper torque settings during installation to prevent over-tightening or under-tightening. Regular inspection of fasteners for signs of corrosion or wear is recommended to identify potential problems early. If corrosion is detected, cleaning and reapplying a corrosion-resistant coating can help mitigate further damage. In cases of damage, replacing the fastener with a new one is advisable to maintain structural integrity. Adhering to recommended maintenance practices ensures optimal performance and longevity of the Cummins Twelve Point Cap Screw ⁶.

Cummins Overview

Cummins Inc. is a renowned manufacturer with a rich history in the automotive industry. The company is known for its commitment to quality and innovation, particularly in the production of high-performance automotive components. Cummins’ expertise in manufacturing fasteners, including the Twelve Point Cap Screw, underscores its dedication to providing reliable and durable solutions for heavy-duty applications. The reputation of Cummins in the industry is built on a foundation of rigorous testing, adherence to quality standards, and a focus on customer satisfaction ⁷.

Twelve Point Cap Screw 205354 in Cummins Engines

The Twelve Point Cap Screw 205354, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is utilized in several engine configurations, ensuring secure fastening and stability within the engine assembly.

K-Series Engines

• K19
• K38
• K50

These K-Series engines benefit from the robust design of the Twelve Point Cap Screw 205354, which provides reliable fastening for critical engine components.

M-Series Engines

• M11 CELECT PLUS

The M11 CELECT PLUS engine incorporates the Twelve Point Cap Screw 205354 to maintain structural integrity and ensure precise alignment of various engine parts.

QSK-Series Engines

• QSK19 CM2350 K105
• QSK19 CM2350 K114
• QSK19 CM2350 K144G
• QSK19 CM500
• QSK19 CM850 MCRS
• QSK19G
• QSK38 CM2150 MCRS
• QSK38 CM850 MCRS
• QSK50 CM2150 K107
• QSK50 CM2150 MCRS
• QSK50 CM2350 K108

The QSK-Series engines, including the QSK19 and QSK50 models, utilize the Twelve Point Cap Screw 205354 for its superior strength and durability. This screw is essential in maintaining the alignment and securing the components within these high-performance engines.

QSNT-Series Engines

• QSNT14 CM876 N102

In the QSNT14 CM876 N102 engine, the Twelve Point Cap Screw 205354 plays a crucial role in ensuring the engine’s components are tightly fastened, contributing to the engine’s overall reliability and performance.

V-Series Engines

• V28
• V903

The V-Series engines, such as the V28 and V903, also incorporate the Twelve Point Cap Screw 205354. This screw is vital for maintaining the structural integrity and precise alignment of engine components in these models ⁸.

Role of Part 205354 Twelve Point Cap Screw in Engine Systems

Part 205354, a Twelve Point Cap Screw, is integral to the assembly and securement of various components within engine systems. Its application spans across multiple areas, ensuring the structural integrity and operational efficiency of the engine.

Aftercooler Mounting

In the aftercooler system, the Twelve Point Cap Screw is used to fasten the aftercooler to its mounting brackets. This secure attachment is essential for maintaining the alignment and stability of the aftercooler, which is vital for effective cooling of compressed air.

Air Cleaner and Air Compressor

For the air cleaner and air compressor, the screw plays a role in attaching the housing to the engine block or frame. This ensures a sealed environment, preventing contaminants from entering the air intake system and maintaining the efficiency of the air compressor.

Auxiliary Cooling System

Within the auxiliary cooling system, the screw is employed to mount cooling fans and radiators. Proper attachment is necessary to ensure these components operate within their designed parameters, contributing to the overall cooling efficiency of the engine.

Base Parts and Block Assembly

The screw is also utilized in the assembly of base parts and the engine block. It secures various components to the block, such as the cylinder short K-6 and the breather, ensuring a tight fit that prevents oil leaks and maintains engine integrity.

Crankcase and Connection Points

In the crankcase area, the Twelve Point Cap Screw is critical for securing the crankcase breather and other connection points. This includes the exhaust outlet and the cylinder block, where it ensures that all connections are secure and leak-free.

Dipstick and Fill & Breather Systems

For the dipstick fill & breather and similar systems, the screw is used to attach the dipstick and breather components to the engine. This securement is important for accurate oil level readings and effective ventilation of the crankcase.

Drive and Auxiliary Systems

In drive systems, such as the auxiliary pump and hydraulic pump drive, the screw is used to mount these components to the engine. This ensures that the drive mechanisms are securely attached, allowing for efficient operation and power transmission.

Heat Exchanger and Water Transfer Connection

The screw is also found in heat exchanger systems and water transfer connections, where it secures these components to the engine or frame. This is important for maintaining the flow of coolant and ensuring the heat exchanger operates efficiently.

Front Engine Guard and Handhole Covers

On the front engine guard and handhole dipstick covers, the screw is used for mounting and securing these protective elements. This not only ensures the safety of personnel but also protects internal components from damage.

Woodward Mounting Governor

Finally, in the Woodward mounting governor system, the screw is used to attach the governor to the engine. This securement is essential for the precise control of engine speed and performance.

Throughout these applications, the Twelve Point Cap Screw demonstrates its versatility and importance in engine system assemblies, contributing to the overall reliability and performance of the engine ⁹.

Conclusion

The Cummins Twelve Point Cap Screw, part number 205354, is a critical component in heavy-duty truck and engine applications. Its unique design, robust construction, and key features make it a reliable and durable fastener. The benefits of using this part include improved grip, enhanced torque transmission, and resistance to corrosion and wear. Proper maintenance and adherence to torque specifications ensure optimal performance and longevity. Cummins’ commitment to quality and innovation is evident in the design and application of this part, contributing to the overall reliability and performance of heavy-duty trucks and engines.