3069120
Captive Washer Cap Screw
Cummins®

The Cummins Captive Washer Cap Screw, part number 3069120, is a vital component in the maintenance and operation of commercial trucks. This screw ensures secure fastening and reliable sealing in various truck components. Understanding its function, applications, and the manufacturer’s reputation is essential for appreciating its role in the automotive industry.

Basic Concepts of Captive Washer Cap Screw

A Captive Washer Cap Screw is a fastener that includes an integrated washer. This design allows for efficient sealing and fastening in a single component. The washer provides a seal that prevents leaks and enhances the screw’s ability to hold components firmly in place. In the automotive industry, these screws are commonly used in applications where both sealing and secure fastening are required ¹.

Purpose of the 3069120 Captive Washer Cap Screw in Truck Operation

The 3069120 Captive Washer Cap Screw is designed to provide secure fastening for various components and systems within commercial trucks. The secure fastening is vital for the integrity and performance of these components, ensuring they remain in place under the dynamic conditions of truck operation ².

Key Features of the 3069120 Captive Washer Cap Screw

The 3069120 Captive Washer Cap Screw is constructed with features that enhance its performance and durability. It is made from high-quality materials that offer resistance to corrosion and wear. The screw has a specific thread type that ensures a tight and secure fit. Additionally, the integrated washer is designed to provide an effective seal, preventing leaks and ensuring the components remain securely fastened ³.

Benefits of Using the 3069120 Captive Washer Cap Screw

Using the 3069120 Captive Washer Cap Screw offers several advantages. The integrated washer provides improved sealing, reducing the risk of leaks. The design of the screw allows for ease of installation, saving time during maintenance procedures. Its resistance to vibration and corrosion ensures longevity and reliability in truck operations, contributing to overall efficiency and safety ⁴.

Installation and Usage Guidelines

Proper installation of the 3069120 Captive Washer Cap Screw involves following specific torque specifications to ensure a secure fit without over-tightening. It is important to use the correct tools and techniques to install the screw properly. Common applications within truck maintenance and repair include fastening components that require both sealing and secure attachment ⁵.

Troubleshooting and Maintenance

Identifying common issues with the 3069120 Captive Washer Cap Screw, such as loosening, corrosion, or damage, is important for maintaining truck performance and safety. Regular maintenance checks should be conducted to ensure the screw remains in good condition. If issues are detected, replacement procedures should be followed to maintain the integrity of the fastening and sealing ⁶.

Cummins: Manufacturer Overview

Cummins Inc. is a well-established manufacturer in the commercial truck industry, known for its commitment to quality and innovation. The company offers a wide range of products, including engines, filtration systems, and aftermarket parts. Cummins’ reputation for producing reliable and high-performance components makes it a trusted name in the automotive sector. The 3069120 Captive Washer Cap Screw is a testament to Cummins’ dedication to providing quality fastening solutions for commercial trucks ⁷.

Applications of the 3069120 Captive Washer Cap Screw in Cummins Engines

The 3069120 Captive Washer Cap Screw is used in several Cummins engine models to secure various components, ensuring stability and reliability during operation.

N14 CELECT and N14 CELECT PLUS Engines

In the N14 CELECT and N14 CELECT PLUS engines, the Captive Washer Cap Screw is utilized in multiple applications. It helps in fastening parts that require precise alignment and secure attachment, such as in the engine’s valve cover or other critical assemblies. The design of the screw ensures that the washer remains captive, preventing it from being lost during assembly or maintenance ⁸.

N14 MECHANICAL Engine

Similarly, in the N14 MECHANICAL engine, the Captive Washer Cap Screw is integral to securing various engine components. Its role is to provide a reliable fastening mechanism, ensuring that parts remain securely in place under the high stresses and vibrations typical of engine operation ⁹.

NH/NT 855 Engine

The NH/NT 855 engine also incorporates the Captive Washer Cap Screw in its design. This part is essential for maintaining the structural integrity of the engine by securing components that are subject to significant mechanical forces ¹⁰.

QSK19 CM850 MCRS and QSK50 CM2150 MCRS Engines

In the QSK19 CM850 MCRS and QSK50 CM2150 MCRS engines, the Captive Washer Cap Screw is used in several key areas. Its design allows for easy installation and removal, which is crucial during routine maintenance and repairs. The screw’s captive washer feature ensures that the washer stays in place, reducing the risk of losing small parts during engine servicing ¹¹.

QSN14 CM876 N103 Engine

The QSN14 CM876 N103 engine also benefits from the use of the Captive Washer Cap Screw. This part is essential for securing various components within the engine, ensuring that they remain firmly attached and aligned. The screw’s design facilitates efficient assembly and disassembly, making maintenance procedures more straightforward ¹².

Role of Part 3069120 Captive Washer Cap Screw in Engine Systems

The 3069120 Captive Washer Cap Screw is integral to the secure assembly and operation of various engine components. Its application ensures the stability and integrity of connections within the engine system.

Air Mounting Compressor

In the air mounting compressor, the Captive Washer Cap Screw secures the compressor to its mounting bracket. This ensures that the compressor remains firmly in place, allowing it to function efficiently without vibrations that could lead to performance issues ¹³.

Bypass Mounting Tube

For the bypass mounting tube, the screw plays a role in attaching the tube to the engine block or other structural components. This secure attachment is essential for maintaining the integrity of the bypass system, which is vital for regulating airflow and pressure within the engine ¹⁴.

Engine Control Module (ECM)

When mounting the Engine Control Module, the Captive Washer Cap Screw ensures that the ECM is securely fastened to its designated location. This is important for protecting the sensitive electronic components from vibrations and ensuring reliable operation ¹⁵.

Fuel System Components

Across various fuel system components such as the fuel bypass mounting, fuel drain mounting, fuel line return, fuel pump, fuel pump mounting support, fuel supply check valve mounting, fuel supply mounting, fuel supply mounting tube, fuel supply plumbing, fuel transfer kit, fuel transfer right-hand engine kit, fuel tube, and fuel tubing, the screw provides the necessary tension and security. This is essential for preventing leaks, ensuring proper fuel flow, and maintaining the overall efficiency of the fuel delivery system ¹⁶.

Turbocharger Arrangement and Plumbing

In turbocharger arrangements and plumbing, the Captive Washer Cap Screw is used to secure turbocharger components and plumbing tubes. This ensures that the turbocharger operates within specified parameters, enhancing engine performance and reliability ¹⁷.

Valve Mounting Fuel Interrupt

For the valve mounting fuel interrupt, the screw ensures that the valve is securely mounted, allowing for precise control over fuel delivery. This is important for maintaining engine performance and fuel efficiency ¹⁸.

Wiring Accessories

In wiring accessories, the screw is used to secure wiring harnesses and pacer wire harnesses. This ensures that electrical connections remain intact, reducing the risk of shorts or failures that could affect engine operation ¹⁹.

Tube, Mtg. & Water Transfer and Fuel Supply

For components like the tube, mtg. & water transfer, and tube, mtg. & fuel supply, the screw ensures that these tubes are securely mounted. This is vital for maintaining the integrity of fluid transfer systems, whether for water transfer or fuel supply, ensuring consistent and reliable engine performance ²⁰.

Conclusion

The 3069120 Captive Washer Cap Screw by Cummins is a critical component in the maintenance and operation of commercial trucks. Its design ensures secure fastening and reliable sealing, contributing to the overall efficiency and safety of truck operations. Understanding its features, benefits, and applications is essential for effective maintenance and repair procedures.