3999620
Studded Flange Cap Screw
Cummins®

The Studded Flange Cap Screw, Part #3999620 by Cummins, is a specialized fastener designed for heavy-duty truck applications. Cummins, a well-established manufacturer in the automotive industry, produces this component to meet the demanding requirements of truck mechanics and operators. This screw plays a significant role in ensuring the secure attachment of various components within a truck’s mechanical system.

Basic Concepts

A Studded Flange Cap Screw is a type of fastener that features a threaded stud on one end and a hexagonal head on the other. This design allows it to be used in conjunction with a nut to create a strong, secure connection. In the context of heavy-duty trucks, the 3999620 Studded Flange Cap Screw is utilized to fasten flanges and other components, ensuring they remain firmly in place despite the rigors of truck operation ¹.

Role and Function

The 3999620 Studded Flange Cap Screw serves a vital function in the operation of a truck by securing flanges and other critical components. Its design allows for a robust connection that can withstand significant stress and vibration, which are common in heavy-duty truck environments. This screw is particularly useful in applications where components need to be frequently accessed or replaced, as it allows for easy disassembly and reassembly ².

Key Features

The 3999620 Studded Flange Cap Screw is constructed from high-quality materials, ensuring durability and resistance to corrosion. It features a specific threading type that provides a secure fit, and its design includes elements that enhance performance, such as a flanged end that distributes load more evenly. These features contribute to the screw’s reliability in demanding applications ³.

Benefits

Using the 3999620 Studded Flange Cap Screw offers several advantages. Its durable construction ensures long-lasting performance, while its resistance to vibration helps maintain a secure connection over time. The screw’s design also facilitates ease of installation, reducing the time and effort required for maintenance tasks.

Installation Process

Proper installation of the Studded Flange Cap Screw involves several steps. First, ensure the mating surfaces are clean and free of debris. Next, align the screw with the corresponding hole and begin threading it in by hand to avoid cross-threading. Once started, use a torque wrench to tighten the screw to the manufacturer’s specified torque setting. It is important to avoid over-tightening, which can damage the screw or the components being fastened.

Maintenance and Troubleshooting

Regular maintenance of the 3999620 Studded Flange Cap Screw involves inspecting it for signs of wear or damage, such as corrosion or stripped threads. If any issues are detected, the screw should be replaced to prevent failure. Troubleshooting common issues, such as loosening or vibration, may involve re-torquing the screw or investigating the cause of excessive movement.

Safety Considerations

When working with the Studded Flange Cap Screw, it is important to observe several safety guidelines. Always use the appropriate tools and follow the manufacturer’s torque specifications to avoid over-tightening. Wear protective gear, such as gloves and safety glasses, to protect against injury from sharp edges or flying debris. Additionally, ensure that the work area is well-ventilated if using any chemicals for cleaning or lubrication.

Cummins Overview

Cummins is a reputable manufacturer known for producing high-quality automotive components. With a strong presence in the industry, Cummins is committed to delivering reliable and durable parts that meet the needs of professionals in the automotive sector. Their products, including the 3999620 Studded Flange Cap Screw, are designed with precision and engineered to perform under the most demanding conditions.

Compatibility with Cummins Engines

The Studded Flange Cap Screw, part number 3999620, manufactured by Cummins, is a critical component in the assembly and maintenance of various Cummins engines. This part is designed to secure flanges, ensuring a tight and reliable seal in applications where pressure or fluid containment is crucial.

ISC Series Engines

• ISC CM2150
• ISC CM850
• ISC8.3 CM2250
• ISL CM2150
• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

The ISC and ISL series engines utilize the Studded Flange Cap Screw 3999620 in several critical applications. These engines are commonly found in heavy-duty trucks and industrial applications, where durability and reliability are paramount. The screw ensures that flanges, such as those on the exhaust manifold or turbocharger, are securely fastened, preventing leaks and maintaining optimal performance.

L Series Engines

• L8.9
• L8.9 CM2670 L134C
• L8.9 L121
• L9 CM2670 L128B
• L9.5 L117

The L series engines, which are known for their robust design and efficiency, also incorporate the Studded Flange Cap Screw 3999620. This part is essential for securing various flanges in these engines, ensuring that components such as the intake manifold and exhaust systems are tightly sealed. The screw’s design allows for easy installation and removal, making maintenance more straightforward.

QSC and QSL Series Engines

• QSC8.3 CM2880 C102
• QSC8.3 CM554
• QSC8.3 CM850 (CM2850)
• QSC9 CM2250 / QSL9 CM2250
• QSL8.9 CM2150 L141
• QSL9 CM2250
• QSL9 CM2350 L102
• QSL9 CM554

The QSC and QSL series engines, which are often used in construction and agricultural equipment, also benefit from the use of the Studded Flange Cap Screw 3999620. This part is used to secure flanges in these engines, ensuring that critical components such as the turbocharger and exhaust systems are properly sealed. The screw’s studded design provides additional grip and stability, which is essential in the demanding environments where these engines operate.

ISV (Nissan)

• ISV (Nissan)

The ISV engine, a collaboration between Cummins and Nissan, also utilizes the Studded Flange Cap Screw 3999620. This part is integral to the engine’s design, ensuring that flanges are securely fastened and that the engine operates efficiently and reliably. The screw’s design allows for easy maintenance, making it a preferred choice for this specific engine series.

By ensuring that flanges are tightly sealed, the Studded Flange Cap Screw 3999620 plays a crucial role in the performance and longevity of these Cummins engines. Its design and material make it suitable for a wide range of applications, from heavy-duty trucks to industrial and construction equipment.

Role of Part 3999620 Studded Flange Cap Screw in Engine Systems

The 3999620 studded flange cap screw is an essential component in various engine systems, facilitating secure connections and maintaining system integrity.

In the thermostat housing arrangement, this screw ensures a tight seal, preventing coolant leaks and maintaining optimal engine temperature. Its application in the turbocharger setup secures the connection between the turbine and compressor housings, ensuring efficient airflow and boosting performance.

Within the breather and crankcase connection, the 3999620 screw plays a role in maintaining pressure balance, which is vital for engine lubrication and performance. In the water outlet and cooler system, it secures the water outlet to the engine block, ensuring consistent coolant flow and efficient heat dissipation.

For the engine oil system, particularly in the engine oil cooler and filter, this screw ensures that all connections are leak-free, maintaining oil pressure and filtration efficiency. In the fuel system, including the fuel filter and its location, the screw secures the filter housing, ensuring a stable fuel supply and preventing contamination.

In the injector supply plumbing, the 3999620 screw is used to secure connections, ensuring precise fuel delivery to the injectors. Its role in the air intake manifold arrangement secures the manifold to the engine, optimizing air intake and combustion efficiency.

Lastly, in the long block kit and lubricating oil filter head, this screw ensures all components are firmly attached, contributing to the overall durability and performance of the engine.

Conclusion

The 3999620 Studded Flange Cap Screw by Cummins is a critical component in heavy-duty truck applications, ensuring secure and reliable connections in various engine systems. Its durable construction, resistance to corrosion, and ease of installation make it an essential part for maintaining the performance and longevity of Cummins engines.