3963749
Studded Flange Cap Screw
Cummins®

The Studded Flange Cap Screw, Part #3963749, manufactured by Cummins, is a specialized fastener designed for heavy-duty truck applications. Cummins, a renowned name in the automotive and heavy-duty truck industry, ensures that this component meets the rigorous demands of truck mechanics and operations. This screw is integral to maintaining the structural integrity and operational efficiency of various truck systems.

Basic Concepts

A Studded Flange Cap Screw is a type of fastener that includes a threaded stud and a flanged head. The stud is designed to be inserted through holes in components and secured with a nut, while the flange provides additional surface area for torque application, enhancing the screw’s holding power. In a truck’s mechanical system, these screws are used to secure components that require a high degree of stability and resistance to vibration ¹.

Purpose and Role in Truck Operation

This Cummins part plays a significant role in the operation of a truck by securing critical components that are subject to high stress and vibration. It is commonly used in applications such as engine mounts, transmission housings, and chassis components. Its design ensures that these components remain firmly in place, contributing to the overall stability and performance of the truck ².

Key Features

This part is crafted from high-strength materials, typically alloy steel, to withstand the demanding conditions of heavy-duty truck environments. Its design includes a studded section that threads into a nut, providing a secure connection, and a flanged head that distributes torque more effectively. These features enhance the screw’s performance, making it suitable for applications where durability and reliability are paramount ³.

Benefits

Utilizing the 3963749 offers several advantages. Its robust material composition and design elements contribute to enhanced durability, ensuring long-term reliability in truck maintenance and operation. The screw’s ability to resist loosening under vibration also improves efficiency, reducing the need for frequent re-tightening and maintenance ⁴.

Installation Process

Proper installation of the Studded Flange Cap Screw involves several steps. First, ensure that the components to be joined are correctly aligned. Insert the stud through the designated holes and secure it with a nut. Use a torque wrench to tighten the nut to the manufacturer’s specified torque settings, ensuring that the screw is neither over-tightened nor under-tightened. It is also important to apply a thread locker to prevent loosening due to vibration.

Troubleshooting and Maintenance

Common issues with the Studded Flange Cap Screw may include loosening due to vibration or corrosion. Regular inspection and maintenance are recommended to ensure longevity and optimal performance. If loosening is detected, re-tighten the screw to the specified torque settings and reapply thread locker if necessary. In cases of corrosion, cleaning the affected area and applying a corrosion-resistant coating can help prevent further issues.

Safety Considerations

When working with the Studded Flange Cap Screw, it is important to observe several safety guidelines. Always wear appropriate personal protective equipment, such as gloves and safety glasses, to protect against injury. Ensure that the work area is clean and free of debris to prevent accidents. Follow the manufacturer’s torque specifications to avoid over-tightening, which can lead to component damage or screw failure.

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 reputation for quality, innovation, and reliability in the automotive and heavy-duty truck industry. The company’s extensive product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of various applications.

Studded Flange Cap Screw 3963749 in Cummins Engines

The Studded Flange Cap Screw part number 3963749, manufactured by Cummins, is a critical component in various Cummins engine models. This part is designed to secure flanges and other components in place, ensuring structural integrity and operational efficiency. Below is a detailed description of how this part fits into different Cummins engine models.

15N CM2380 M104B, B4.5 CM2350 B129B, B6.7 CM2670 B153B

The Studded Flange Cap Screw 3963749 is utilized in the 15N CM2380 M104B, B4.5 CM2350 B129B, and B6.7 CM2670 B153B engines to fasten critical flanges. These engines, known for their robust performance, require reliable fastening solutions to maintain operational safety and efficiency. The screw’s design ensures a tight and secure fit, preventing any movement that could lead to leaks or failures.

C GAS PLUS CM556, F2.8 CM2620 F135B, F3.8 CM2350 F120B, F3.8 CM2620 F137B, F4.5 CM2620 F139B

In the C GAS PLUS CM556, F2.8 CM2620 F135B, F3.8 CM2350 F120B, F3.8 CM2620 F137B, and F4.5 CM2620 F139B engines, the Studded Flange Cap Screw 3963749 plays a pivotal role in securing flanges that are integral to the engine’s operation. These engines are designed for a range of applications, from industrial to commercial use, and the screw’s ability to provide a steadfast connection is crucial for their performance.

ISB CM2150, ISB CM850, ISB4.5 CM2350 B104, ISB6.7 CM2250, ISB6.7 G CM2180 B118

The ISB series engines, including the ISB CM2150, ISB CM850, ISB4.5 CM2350 B104, ISB6.7 CM2250, and ISB6.7 G CM2180 B118, also benefit from the use of the Studded Flange Cap Screw 3963749. These engines are known for their durability and efficiency, and the screw’s design ensures that flanges remain securely fastened, contributing to the engine’s overall reliability.

ISF4.5 CM2220 F123, ISG12 G CMOH6.0 G111, ISL G CM2180, ISX12 G CM2180 EJ

In the ISF4.5 CM2220 F123, ISG12 G CMOH6.0 G111, ISL G CM2180, and ISX12 G CM2180 EJ engines, the Studded Flange Cap Screw 3963749 is used to secure various flanges that are essential for the engines’ operation. These engines are designed for high-performance applications, and the screw’s ability to provide a secure and tight fit is critical for maintaining operational integrity.

QSC9 CM2250/QSL9 CM2250, QSL9 CM2250, QSL9 CM2350 L102

The QSC9 CM2250/QSL9 CM2250, QSL9 CM2250, and QSL9 CM2350 L102 engines also incorporate the Studded Flange Cap Screw 3963749 to fasten flanges. These engines are designed for specific applications, and the screw’s design ensures that flanges remain securely fastened, contributing to the engine’s overall performance and reliability.

Role of Part 3963749 Studded Flange Cap Screw in Engine Systems

The Part 3963749 Studded Flange Cap Screw is integral to the secure assembly and operation of various engine components. It ensures the reliable connection and sealing of critical parts, contributing to the overall efficiency and performance of the engine system.

Air Inlet Pipe and Air Intake Connection

In the air intake system, the studded flange cap screw is used to fasten the air inlet pipe to the air intake connection. This secure attachment prevents air leaks, ensuring that the engine receives a consistent airflow, which is essential for optimal combustion and performance.

Compressor Coolant Arrangement

Within the compressor coolant arrangement, the screw plays a role in attaching components that manage the flow of coolant to and from the compressor. Proper sealing is vital to maintain the efficiency of the cooling system, preventing overheating and ensuring the compressor operates within safe temperature ranges.

Valve Cover and Breather

The valve cover, which houses the engine’s valve train components, is often secured using studded flange cap screws. This not only ensures a tight seal to prevent oil leaks but also allows for the proper function of the breather system, which releases pressure from the crankcase.

Crankcase and Cooler

In the crankcase and cooler systems, these screws are used to attach and seal components that manage engine oil circulation and cooling. A secure attachment is necessary to maintain oil pressure and ensure the cooler effectively dissipates heat, protecting engine components from damage.

Oil Level Gauge and Electronic Control Module Wiring

For the oil level gauge and the electronic control module (ECM) wiring, the studded flange cap screw ensures that these components are firmly mounted and electrically insulated where necessary. This is important for accurate oil level readings and reliable ECM operation, which controls various engine functions.

Oil Filter Cooler Head and Plumbing

In the oil filter cooler head and associated plumbing, these screws secure fittings and connections that are critical for the circulation of oil through the filter and cooler. This ensures that the oil is properly filtered and cooled before returning to the engine, maintaining lubrication and reducing wear.

Air Cleaner and Exhaust Recirculation Air Plumbing

The air cleaner assembly and the exhaust recirculation air plumbing also benefit from the secure attachment provided by the studded flange cap screw. This ensures that the air entering the engine is clean and that exhaust gases are properly recirculated, contributing to efficient combustion and reduced emissions.

Fuel Drain and Heat Shield

Lastly, in the fuel drain system and heat shield arrangement, these screws are used to ensure that fuel drains are securely attached and that heat shields effectively protect nearby components from excessive heat. This is important for safety and the longevity of engine components.

Conclusion

Overall, the Part 3963749 Studded Flange Cap Screw is a fundamental component in the assembly and operation of various engine systems, ensuring secure connections, proper sealing, and the efficient functioning of critical engine components.