3012471
Captive Washer Cap Screw
Cummins®

The Captive Washer Cap Screw, specifically Part #3012471 by Cummins, is a component designed for use in heavy-duty truck maintenance. Cummins, a well-established manufacturer in the automotive and heavy-duty truck industry, produces this screw to meet the demanding requirements of truck maintenance and operation. This part is integral to ensuring the reliability and efficiency of heavy-duty trucks.

Basic Concepts

A Captive Washer Cap Screw is a type of fastener that includes an integrated washer. This design allows for efficient installation and reduces the risk of losing the washer during assembly. In mechanical assemblies, these screws are used to secure components together, providing a stable and durable connection. The captive washer ensures even distribution of pressure across the joined surfaces, enhancing the integrity of the assembly ¹.

Purpose of the 3012471 Captive Washer Cap Screw

This Cummins part is designed to play a role in the operation and maintenance of heavy-duty trucks by securing various components. It ensures that parts remain firmly attached, which is vital for the structural integrity and performance of the truck. This screw is particularly useful in applications where vibrations and dynamic loads are common, as it helps maintain a secure connection under such conditions ².

Key Features

The 3012471 Captive Washer Cap Screw features a design that incorporates a washer within the screw itself. This captive washer is a key attribute, as it simplifies the installation process and ensures consistent pressure distribution. The screw is made from high-quality materials, typically a durable alloy, to withstand the rigors of heavy-duty truck environments. Its design also includes threading that provides a strong grip, enhancing the screw’s ability to hold components securely.

Benefits

Using the 3012471 Captive Washer Cap Screw offers several advantages. The integrated washer simplifies installation, reducing the time and effort required during assembly. This feature also minimizes the risk of washer loss, which can be a common issue with traditional screws. Additionally, the high-quality material and design of the screw contribute to its reliability and long-term durability, making it a cost-effective solution for heavy-duty truck maintenance ³.

Installation Process

Installing the 3012471 Captive Washer Cap Screw involves several steps to ensure proper attachment and functionality. First, align the screw with the designated hole in the component. Using an appropriate tool, such as a torque wrench, tighten the screw to the manufacturer’s specified torque settings. This ensures that the screw is secure without being overtightened, which could damage the component or the screw itself. It is important to follow the recommended procedures to achieve optimal performance.

Common Applications

The 3012471 Captive Washer Cap Screw is versatile and finds applications in various heavy-duty truck components and systems. It is commonly used in engine assemblies, chassis components, and other areas where secure fastening is required. Its ability to withstand vibrations and dynamic loads makes it suitable for a wide range of applications within the truck.

Troubleshooting and Maintenance

To ensure the longevity and performance of the 3012471 Captive Washer Cap Screw, regular maintenance is recommended. Inspect the screw for signs of wear or damage, such as corrosion or loosening. If any issues are detected, address them promptly to prevent further complications. Additionally, ensure that the screw is tightened to the correct torque specifications during installation and periodic checks. These practices help maintain the screw’s effectiveness and contribute to the overall reliability of the truck.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation in the automotive and heavy-duty truck industry. The company offers a wide range of products designed to meet the needs of various applications, emphasizing quality, reliability, and innovation. Cummins’ commitment to excellence is reflected in its products, including the 3012471 Captive Washer Cap Screw.

Captive Washer Cap Screw 3012471 in Cummins Engines

The Captive Washer Cap Screw part number 3012471, manufactured by Cummins, is a crucial component in a variety of Cummins engines. This part is designed to secure various engine parts in place, ensuring the integrity and functionality of the engine. Here’s how it fits into different Cummins engine models:

Medium-Duty Engines

• 6B5.9
• 6C8.3
• G855
• G855 CM558
• GTA855 CM558 (CM2358) G101
• ISM CM570
• K19
• K38
• K50
• L10 CELECT
• L10 GAS
• L10 MECHANICAL
• M11 CELECT
• M11 CELECT PLUS
• N14 CELECT
• N14 CELECT PLUS
• N14 G
• N14 MECHANICAL
• QSB5.9 CM850
• QSK19 CM2350 K105
• QSM11 CM570
• QSNT14 CM876 N102

In these medium-duty engines, the Captive Washer Cap Screw 3012471 is used to secure various components, such as engine covers, brackets, and other structural parts. Its design ensures that these parts remain tightly fastened, preventing any movement that could lead to engine failure or reduced performance.

Heavy-Duty Engines

• NH/NT 855

For the NH/NT 855 engine, the Captive Washer Cap Screw 3012471 plays a similar role in securing engine components. Given the higher power output and more demanding conditions of heavy-duty engines, the reliability of this screw is even more critical. It ensures that all parts are held firmly in place, contributing to the overall durability and efficiency of the engine.

Specialized Engines

• V28
• V903

In specialized engines like the V28 and V903, the Captive Washer Cap Screw 3012471 is used in specific applications where high strength and durability are required. These engines often operate in unique environments, and the screw’s design helps maintain the integrity of the engine under these conditions.

The Captive Washer Cap Screw 3012471 is a versatile and essential component across various Cummins engine models, ensuring that all parts remain securely fastened and the engine operates efficiently.

Role of Part 3012471 Captive Washer Cap Screw in Engine Systems

The 3012471 Captive Washer Cap Screw is instrumental in securing and maintaining the integrity of various engine components. Its application spans across multiple systems, ensuring that parts remain firmly in place under operational stresses.

In the Alternator NTG system, this screw is used to fasten the alternator to its mounting bracket, ensuring stable operation and efficient power generation.

For the Cooler Lubricating Oil Filter and Lubricating Oil Cooler Housing, the screw plays a key role in securing these components, which are vital for maintaining optimal oil temperature and cleanliness.

In the Cylinder Block Cover, it ensures a tight seal, preventing any oil leaks and maintaining the structural integrity of the engine block.

The Exhaust Outlet Connection relies on this screw to secure the connection, ensuring that exhaust gases are efficiently directed away from the engine.

In the Fan Drive Arrangement, it is used to secure the fan to its housing, ensuring proper airflow for engine cooling.

For the Fill and Breather Dipstick, the screw ensures that the dipstick is securely mounted, allowing for accurate oil level checks.

In the Freon Compressor and Freon Mounting Compressor, it is essential for securing the compressor to its mounting, ensuring efficient refrigerant circulation.

The Front Hydraulic Pump and Hydraulic Pump Mounting utilize this screw to ensure the pump is securely fastened, maintaining consistent hydraulic pressure.

In the Fuel Filter Bracket and Fuel Filter Mounting, it ensures that the fuel filter is properly secured, maintaining clean fuel delivery to the engine.

For the Gear Housing Cover, the screw is used to secure the cover, protecting the internal gears from contaminants.

In the Instrument Panel Mounting, it ensures that the panel is securely attached, providing a stable platform for gauges and controls.

The Lube Oil Cooler and Lubricating Oil Filter Head rely on this screw to maintain their secure attachment, ensuring efficient oil cooling and filtration.

In the Oil Filter and Oil Filter Lubricating systems, it ensures that the filter is properly mounted, maintaining clean oil circulation.

For the Oil Gauge Bracket, the screw ensures that the gauge is securely attached, providing accurate oil pressure readings.

In the Transmission system, it is used to secure various components, ensuring smooth gear shifts and transmission durability.

The Turbocharger Plumbing-Upper system utilizes this screw to secure the plumbing, ensuring efficient turbocharger operation.

In the Water Header Cover and Water Inlet Connection Mounting, it ensures that these components are securely attached, maintaining proper coolant flow.

Finally, in the Water Manifold, the screw is used to secure the manifold, ensuring consistent coolant distribution throughout the engine.

Conclusion

The 3012471 Captive Washer Cap Screw by Cummins is a vital component in the maintenance and operation of heavy-duty trucks. Its design, featuring an integrated washer, simplifies installation and ensures consistent pressure distribution across joined surfaces. Made from high-quality materials, this screw is durable and reliable, making it suitable for a wide range of applications within heavy-duty trucks. Regular maintenance and proper installation are key to ensuring its longevity and performance, contributing to the overall reliability and efficiency of the vehicle.