3408216
Captive Washer Cap Screw
Cummins®

Introduction to Captive Washer Cap Screws

Captive washer cap screws are essential in the assembly of commercial trucks, particularly within engine systems. These screws feature an integrated washer within the screw head, providing a secure and stable connection between parts. The washer remains captive, eliminating the risk of it being misplaced during assembly or disassembly processes ¹.

The Role of the 3408216 Captive Washer Cap Screw

The 3408216 Captive Washer Cap Screw, a product of Cummins, is engineered specifically for heavy-duty truck engines. This screw ensures that engine components are fastened securely, significantly reducing the risk of loosening over time. Its design is adept at minimizing galling and wear, common issues that arise from repeated tightening and loosening cycles ².

How the 3408216 Captive Washer Cap Screw Works

The 3408216 Captive Washer Cap Screw offers a robust fastening solution by integrating the screw and washer into a single unit. Upon tightening, the screw compresses the washer against the mating surface, creating a tight seal that effectively resists vibration and movement. This feature is particularly crucial in engine applications where vibrations and high temperatures are prevalent ³.

Importance in Truck Operations

In commercial truck operations, the 3408216 Captive Washer Cap Screw is pivotal in maintaining the integrity of engine components. By ensuring that parts remain securely fastened, it helps avert mechanical failures that could result in costly downtime. This screw is especially critical in high-stress areas of the engine, such as cylinder heads and engine blocks ⁴.

Troubleshooting and Maintenance

To ensure the longevity and performance of the 3408216 Captive Washer Cap Screw, regular maintenance and timely troubleshooting are essential. Consider the following tips:

1. Inspection: Regularly examine the screw and washer for signs of wear, corrosion, or damage. Pay close attention to any cracks or deformations that could compromise the fastener’s integrity.

2. Torque Checks: Adhere to the manufacturer’s specified torque settings when tightening the screw. Over-tightening can damage the screw or the mating surface, whereas under-tightening may lead to loosening over time.

3. Cleaning: Maintain the screw and washer in a clean condition to prevent corrosion and galling. Utilize appropriate cleaning agents and lubricants recommended by Cummins.

4. Replacement: Replace any screws that exhibit signs of wear or damage. Using worn or damaged screws can result in mechanical failures and pose safety hazards.

Cummins: A Leader in Engine Manufacturing

Cummins stands as a distinguished manufacturer of engines and related components for commercial trucks and heavy-duty vehicles. With a heritage of innovation and quality, Cummins products are relied upon by fleet operators and mechanics globally. The company’s dedication to research and development guarantees that their components, including the 3408216 Captive Washer Cap Screw, adhere to the highest standards of performance and reliability ⁵.

Cummins Part 3408216 Captive Washer Cap Screw in Engine Applications

The Cummins part 3408216 Captive Washer Cap Screw is a critical component in various engine assemblies, ensuring secure fastening and stability. This part is integral to the structural integrity and operational efficiency of the engines it is used in.

K19 and KTA19GC CM558 Engines

In the K19 and KTA19GC CM558 engines, the 3408216 Captive Washer Cap Screw is employed to secure various engine components, maintaining alignment and preventing loosening under operational stresses. Its use in these engines highlights its importance in high-performance applications.

QSK19 CM2350 Engines

The QSK19 CM2350 engines, including variants K105, K114, K144G, and others, utilize the 3408216 Captive Washer Cap Screw extensively. This part is crucial in fastening components that are subject to significant mechanical forces, ensuring durability and reliability in demanding environments.

QSK19 CM500 and QSK19 CM850 MCRS Engines

In the QSK19 CM500 and QSK19 CM850 MCRS engines, the 3408216 Captive Washer Cap Screw is used to secure critical engine parts, contributing to the overall robustness and longevity of these engines. Its application in these models underscores its versatility and effectiveness in various engine configurations.

QSK19G Engines

The QSK19G engines also benefit from the use of the 3408216 Captive Washer Cap Screw. This part is essential in maintaining the structural integrity of the engine, ensuring that all fastened components remain securely in place under operational conditions.

The consistent use of the 3408216 Captive Washer Cap Screw across these Cummins engines demonstrates its critical role in engine assembly and maintenance. Its design and material properties make it suitable for a wide range of engine applications, providing reliable fastening solutions.

Role of Part 3408216 Captive Washer Cap Screw in Engine Systems

The Part 3408216 Captive Washer Cap Screw is instrumental in securing various components within engine systems, ensuring both the integrity and performance of the assembly.

In the arrangement of engine components, this screw plays a significant role in maintaining the precise alignment and spacing between parts. Its captive washer design prevents loss during disassembly, which is essential for consistent reassembly and maintenance.

Within the Thermostat Housing, the screw ensures a tight seal, preventing coolant leaks. This is vital for maintaining optimal engine temperature and ensuring the thermostat functions correctly.

When securing the Camshaft to its housing, the screw helps in maintaining the camshaft’s position relative to the cylinder head. This alignment is necessary for the proper operation of the valve train, directly influencing engine performance.

In the Cylinder Head assembly, the screw is used to fasten various components, ensuring that the head remains securely attached to the engine block. This is important for maintaining compression and preventing oil or coolant leaks.

For the Fuel Supply Plumbing, the screw is employed to secure fuel lines and fittings. This ensures that the fuel supply remains intact under varying engine conditions, contributing to consistent fuel delivery and engine performance.

In the broader context of Plumbing and Housing components, the screw’s role extends to securing various fittings and connections. This is essential for the integrity of fluid systems within the engine, whether it be coolant, oil, or fuel.

Overall, the Part 3408216 Captive Washer Cap Screw is a fundamental component in the securement and reliability of engine systems, facilitating the proper function and performance of various interconnected parts.

Conclusion

The 3408216 Captive Washer Cap Screw by Cummins is a vital component in the engine systems of commercial trucks. Its design ensures secure fastening, thereby reducing the risk of mechanical failures and enhancing the vehicle’s overall performance and reliability. Proper maintenance and troubleshooting are crucial to maximizing the lifespan and effectiveness of this essential part.