3972686
Studded Flange Cap Screw
Cummins®

The 3972686 Studded Flange Cap Screw is a specialized fastener produced by Cummins, a well-established manufacturer in the commercial truck industry. This component is designed for use in commercial trucks, where it plays a role in securing various components and contributing to the overall structural integrity of the vehicle.

Basic Concepts of Studded Flange Cap Screws

A studded flange cap screw is a type of fastener that includes a threaded stud and a flange at one end. The flange provides a larger surface area for distribution of clamping force, which enhances the screw’s ability to secure components firmly. These screws are commonly used in applications where high tensile strength and resistance to loosening are required. The studded flange cap screw functions by threading into a corresponding tapped hole, with the flange resting against the surface to prevent rotation and provide additional stability ¹.

Role and Function in Truck Operation

In the operation and maintenance of commercial trucks, the 3972686 Studded Flange Cap Screw plays a role by securing critical components. It ensures that parts remain firmly in place under various operating conditions, which is vital for the truck’s performance and safety. This screw is often used in applications where vibrations and dynamic loads are present, making its role in maintaining structural integrity particularly important ².

Key Features

The 3972686 Studded Flange Cap Screw features a design that includes a hexagonal head for easy tightening with standard tools, a threaded stud for secure fastening, and a flange that provides additional stability. It is composed of high-strength materials, typically alloy steel, which offers enhanced durability and resistance to wear. The screw’s design allows for efficient distribution of clamping force, reducing the risk of component failure ³.

Benefits

Using the 3972686 Studded Flange Cap Screw offers several benefits. Its high-strength material composition contributes to improved durability, making it suitable for demanding applications. The screw’s resistance to corrosion ensures longevity, even in harsh environments. Additionally, the design of the screw facilitates ease of installation, allowing for quick and secure fastening of components ⁴.

Installation Process

Proper installation of the 3972686 Studded Flange Cap Screw involves several steps. First, ensure that the corresponding hole is clean and free of debris. Use a torque wrench to tighten the screw to the manufacturer’s specified torque, which ensures that the correct amount of clamping force is applied without over-tightening. It is also important to periodically check the screw’s tightness, especially after initial installation, to maintain secure fastening ⁵.

Troubleshooting Common Issues

Common issues with studded flange cap screws may include loosening due to vibrations or corrosion over time. To address loosening, re-tighten the screw to the specified torque. If corrosion is present, clean the affected area and consider applying a corrosion-resistant coating to prevent further degradation. Regular inspections can help identify these issues early, allowing for timely maintenance ⁶.

Maintenance Tips

To ensure the longevity and reliability of the 3972686 Studded Flange Cap Screw, regular maintenance practices are recommended. Inspect the screw periodically for signs of wear, corrosion, or loosening. Replace the screw if any damage is detected to maintain the structural integrity of the fastened components. Adhering to these maintenance guidelines will help ensure the screw continues to perform effectively over time ⁷.

Cummins: Manufacturer 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 reputation for quality and innovation in the commercial truck industry. The company offers a wide range of products designed to meet the demanding requirements of commercial applications, including the 3972686 Studded Flange Cap Screw ⁸.

Cummins Engine Compatibility with Studded Flange Cap Screw (Part 3972686)

The Studded Flange Cap Screw (Part 3972686) manufactured by Cummins is a critical component used across a variety of Cummins engine models. This part is essential for securing flanges and ensuring a tight seal, which is crucial for the engine’s operational integrity. Below is a detailed breakdown of the engines that are compatible with this part, grouped where applicable to highlight common features and applications.

ISB Series Engines

• ISB CM2150
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISBE CM2150
• ISBE4 CM850

The ISB series engines, including variants like ISB CM2150 and ISB6.7 CM2350 B101, are known for their robust performance and reliability. The Studded Flange Cap Screw (Part 3972686) is integral to these engines, particularly in securing flanges that are part of the exhaust and cooling systems.

ISC Series Engines

• ISC CM2150
• ISC CM850
• ISC8.3 CM2250

The ISC series engines, such as ISC CM2150 and ISC8.3 CM2250, are designed for heavy-duty applications. The Studded Flange Cap Screw (Part 3972686) is used here to ensure that flanges are securely fastened, which is vital for maintaining system integrity under high stress conditions.

ISL Series Engines

• ISL CM2150
• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

The ISL series engines, including ISL CM2150 and ISL9.5 CM2880 L138, are widely used in both on-highway and off-highway applications. The Studded Flange Cap Screw (Part 3972686) is a key component in these engines, particularly for securing flanges in the exhaust and intake systems.

L Series Engines

• L8.9
• L8.9 CM2670 L134C
• L8.9 L121
• L9.5 L117

The L series engines, such as L8.9 and L9.5 L117, are known for their durability and power. The Studded Flange Cap Screw (Part 3972686) is used to secure flanges in these engines, ensuring that connections remain tight and leak-free.

QSB Series Engines

• QSB6.7 CM2250
• QSB6.7 CM2350 B105
• QSB6.7 CM850 (CM2850)
• QSB6.7 M CM2250
• QSB7 CM2880 B117

The QSB series engines, including QSB6.7 CM2250 and QSB7 CM2880 B117, are designed for a variety of applications, from agricultural to industrial use. The Studded Flange Cap Screw (Part 3972686) is essential for securing flanges in these engines, particularly in the exhaust and cooling systems.

QSC Series Engine

• QSC8.3 CM2880 C102

The QSC8.3 CM2880 C102 engine is another model where the Studded Flange Cap Screw (Part 3972686) is used to secure flanges, ensuring that the engine operates efficiently and reliably.

Role of Part 3972686 Studded Flange Cap Screw in Engine Systems

The 3972686 studded flange cap screw is integral in securing various components within engine systems. It ensures that parts remain firmly in place, thereby maintaining the integrity and functionality of the engine.

Securing the Engine Cover

The 3972686 screw is commonly used to attach the engine cover. This cover protects internal components from debris and environmental factors. A secure fit is essential to prevent any ingress that could lead to contamination or damage.

Valve Assembly Fixation

In valve assemblies, the 3972686 screw plays a significant role. It ensures that valve components are held in precise alignment, which is vital for the proper operation of the engine. Misalignment can lead to inefficient combustion and increased wear on engine parts.

Engine Brake (12V) Kit Integration

For engines equipped with a 12V engine brake kit, the 3972686 screw is used to secure the kit’s components. This ensures that the brake system functions correctly, providing the necessary control during deceleration and enhancing overall engine performance.

Fuel Filter Location and Mounting

At the fuel filter location, the 3972686 screw is employed to mount the fuel filter securely. This is important for maintaining a consistent fuel flow and preventing leaks. A well-mounted fuel filter ensures that the engine receives clean fuel, which is essential for optimal performance.

Engine Control Module Attachment

The engine control module (ECM) requires a stable mounting solution, and the 3972686 screw provides this stability. The ECM is responsible for managing various engine functions, and any movement or instability could lead to incorrect readings and suboptimal engine operation.

General Mounting Applications

Beyond specific components, the 3972686 screw is versatile in general mounting applications throughout the engine system. It is used to secure brackets, sensors, and other auxiliary components, ensuring they remain in place under the dynamic conditions of engine operation.

Conclusion

In summary, the 3972686 studded flange cap screw is a fundamental component in the assembly and maintenance of engine systems, providing the necessary security and stability for a wide range of parts.