172640
Twelve Point Cap Screw
Cummins®

Introduction

The Cummins 172640 Twelve Point Cap Screw is a specialized fastener designed for commercial truck applications. It provides secure and reliable fastening solutions in environments where durability and resistance to loosening are critical. This part plays a significant role in maintaining the integrity and performance of various components within commercial trucks.

Basic Concepts of Twelve Point Cap Screws

A twelve point cap screw is characterized by its hexagonal socket head, which allows for increased torque application compared to traditional hex-head screws. This design reduces the likelihood of cam-out, leading to more efficient and secure fastening ¹. In the automotive industry, twelve point cap screws are commonly used in applications requiring high strength and resistance to vibration, such as in engine components, chassis assemblies, and other critical areas.

Purpose and Role in Truck Operation

The Cummins 172640 Twelve Point Cap Screw is designed to secure components within commercial trucks that are subject to high stress and vibration. Its application areas include fastening engine components, securing chassis parts, and attaching various brackets and supports. The screw’s design ensures that these components remain firmly in place, contributing to the overall reliability and performance of the truck.

Key Features

The Cummins 172640 Twelve Point Cap Screw features a robust design that includes a twelve-point socket head for enhanced torque application and reduced cam-out. It is typically made from high-strength materials, such as alloy steel, to provide durability and resistance to wear. The screw’s precise threading and surface treatment enhance its performance and longevity in demanding applications.

Benefits

The Cummins 172640 Twelve Point Cap Screw offers several benefits, including improved torque application due to its twelve-point design, which allows for higher torque without the risk of cam-out. Its resistance to loosening ensures that fastened components remain secure, even in environments with significant vibration. Additionally, the screw’s enhanced security in fastening applications contributes to the overall safety and reliability of the truck.

Installation Considerations

Proper installation of the Cummins 172640 Twelve Point Cap Screw is crucial for ensuring its performance and longevity. Guidelines for installation include using the appropriate torque specifications to avoid over-tightening, which can lead to damage, or under-tightening, which can result in loosening. Recommended tools for installation include a torque wrench to achieve the precise torque required for the application.

Troubleshooting and Maintenance

Common issues with twelve point cap screws may include loosening due to vibration or corrosion. Troubleshooting steps involve inspecting the screw and surrounding components for signs of wear or damage, ensuring proper torque has been applied, and addressing any environmental factors that may contribute to corrosion. Maintenance tips include regular inspection of fastened components, reapplying torque as necessary, and protecting the screw from corrosive environments to ensure its longevity and reliability.

Manufacturer Overview - Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins has established a strong reputation in the commercial truck industry. The company’s commitment to quality and innovation is evident in its manufacturing processes and the performance of its products, including the Cummins 172640 Twelve Point Cap Screw.

Twelve Point Cap Screw 172640 in Cummins Engines

The Twelve Point Cap Screw 172640, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is designed to provide robust fastening in high-stress environments, ensuring the integrity and reliability of engine assemblies.

K Series Engines

The K19 and K50 engines, part of Cummins’ K Series, utilize the Twelve Point Cap Screw 172640 for securing various engine components. These engines are known for their durability and efficiency, and the cap screw plays a vital role in maintaining the structural integrity of the engine under operational stresses.

KTA19GC Engine

In the KTA19GC engine, the Twelve Point Cap Screw 172640 is used in several key areas, ensuring that critical engine parts remain tightly fastened. This engine is designed for both industrial and marine applications, and the cap screw’s reliability is essential in these demanding environments.

QSK Series Engines

The QSK19 CM2350 K105, QSK38 CM2150 MCRS, QSK38 CM850 MCRS, QSK50 CM2150 K107, QSK50 CM2150 MCRS, and QSK50 CM2350 K108 engines all incorporate the Twelve Point Cap Screw 172640. These engines are part of Cummins’ QSK Series, which is renowned for its power and efficiency. The cap screw is used in various applications within these engines, including securing engine mounts, brackets, and other critical components.

V Series Engines

The V903 and VTA903 CM2250 V105 engines also feature the Twelve Point Cap Screw 172640. These engines are designed for heavy-duty applications, and the cap screw’s strength and reliability are crucial for maintaining the engine’s structural integrity under heavy loads and high-stress conditions.

Role of Part 172640 Twelve Point Cap Screw in Engine Systems

Part 172640, a Twelve Point Cap Screw, is integral to the assembly and functionality of various engine components. Its application spans across multiple systems, ensuring secure fastening and reliable operation.

Aftercooler Cover

In the aftercooler system, the Twelve Point Cap Screw is used to secure the aftercooler cover. This ensures a tight seal, preventing coolant leaks and maintaining efficient cooling of the compressed air.

Air Mounting Manifold

The air mounting manifold relies on the Twelve Point Cap Screw to attach securely to the engine block. This connection is vital for the proper distribution of air within the engine system.

Crankcase Breather

For the crankcase breather system, the Twelve Point Cap Screw is employed to fasten the breather cover. This helps in maintaining the correct pressure within the crankcase, ensuring optimal engine performance.

Auxiliary Cooling System

In the auxiliary cooling system, the Twelve Point Cap Screw is utilized to secure components such as the check valve drain mounting and the cooler. This ensures that the cooling system operates efficiently, preventing overheating of engine parts.

Oil Cooler and Torque Converter Oil Cooler

Both the oil cooler and the torque converter oil cooler use the Twelve Point Cap Screw to secure their respective covers and mounting brackets. This is essential for maintaining the integrity of the cooling circuits and ensuring consistent oil temperature.

Cover Mounting Hood

The cover mounting hood, which protects various engine components, is fastened using the Twelve Point Cap Screw. This provides a secure enclosure, shielding sensitive parts from debris and environmental factors.

Cylinder Block

Within the cylinder block, the Twelve Point Cap Screw is used to secure various attachments and covers. This ensures that all components within the block are held firmly in place, contributing to the overall stability and performance of the engine.

Lubricating Oil Filter

The lubricating oil filter assembly incorporates the Twelve Point Cap Screw to secure the filter housing. This is important for maintaining a leak-free system and ensuring that the oil filtration process is effective.

Manifold Air Intake

In the manifold air intake system, the Twelve Point Cap Screw is used to secure the manifold to the engine. This connection is crucial for the proper intake of air, which is essential for combustion.

Water Pump Mounting

The water pump mounting bracket utilizes the Twelve Point Cap Screw to ensure a secure attachment to the engine block. This is vital for the efficient operation of the water pump, which circulates coolant throughout the engine.

Turbocharger Location

At the turbocharger location, the Twelve Point Cap Screw is used to secure the turbocharger to the engine. This ensures that the turbocharger remains firmly in place, allowing for efficient air compression and improved engine performance.

Vent Line Plumbing and Water Connections

The vent line plumbing and various water connections within the engine system also rely on the Twelve Point Cap Screw for secure fastening. This is important for maintaining the integrity of these systems, ensuring that there are no leaks and that all connections remain tight.

Water Bypass Tube and Water Inlet Connection

Finally, the water bypass tube and water inlet connection use the Twelve Point Cap Screw to ensure secure and leak-free connections. This is essential for the proper circulation of coolant and the maintenance of optimal engine temperature.

Conclusion

The Cummins 172640 Twelve Point Cap Screw is a vital component in the operation and maintenance of commercial trucks and Cummins engines. Its robust design, high-strength materials, and precise engineering ensure secure fastening and reliable performance in demanding environments. Proper installation, regular maintenance, and understanding its role in various engine systems are crucial for maximizing the benefits of this part.