3681927
Studded Captive Washer Screw
Cummins®

The Cummins Studded Captive Washer Screw, part number 3681927, is engineered for specific applications within the mechanical assemblies of commercial trucks. This component is essential for the secure fastening of various parts, ensuring they remain firmly in place under operational conditions. Its use is particularly noted in the heavy-duty truck sector, where durability and reliability are critical.

Basic Concepts

A Studded Captive Washer Screw is a fastener that includes a washer directly attached to the screw. This design ensures the washer remains in place during installation, reducing the risk of loss and ensuring consistent torque application. In mechanical assemblies, these screws are used to secure components that require high tensile strength and resistance to vibration ¹.

Role in Truck Operation

The 3681927 Studded Captive Washer Screw is vital for the operation and maintenance of commercial trucks by securing components subject to high stress and vibration. Its design allows it to withstand the rigors of truck operation, ensuring that critical parts remain securely fastened. This is particularly important in applications where the failure of a fastener could lead to significant operational issues ².

Key Features

The 3681927 Studded Captive Washer Screw features a design that includes a studded section with a captive washer. This screw is typically made from high-strength materials to ensure durability. Its unique attributes include a design that prevents the washer from being misplaced during installation, which contributes to consistent and reliable fastening ³.

Benefits

Using the 3681927 Studded Captive Washer Screw provides several advantages. Its design enhances durability by ensuring that the washer remains in place, which is crucial for maintaining the integrity of the fastener under stress. Additionally, the screw’s resistance to wear and ease of installation make it a practical choice for applications where efficiency and reliability are required ⁴.

Troubleshooting and Maintenance

Common issues with the 3681927 Studded Captive Washer Screw may include wear over time or damage due to excessive stress. Regular inspection and replacement according to the manufacturer’s guidelines can help maintain its performance. Troubleshooting may involve checking for proper torque application and ensuring that the screw is compatible with the application to prevent issues related to fit or function ⁵.

Application of Studded Captive Washer Screw (Part 3681927) in Cummins Engines

The Studded Captive Washer Screw (Part 3681927) manufactured by Cummins is a component in several of their engine models. This part is integral to the assembly and maintenance of the engines, ensuring proper fastening and stability of various components.

ISG12 CM2880 G107 and ISX CM570

In the ISG12 CM2880 G107 and ISX CM570 engines, the Studded Captive Washer Screw is used in applications where secure fastening is critical. This includes securing certain engine mounts and brackets, ensuring that these components remain firmly in place under operational stresses.

ISX CM870 and ISX CM871

For the ISX CM870 and ISX CM871 engines, the Studded Captive Washer Screw is employed in similar contexts, with a focus on maintaining the integrity of the engine’s structural components. These engines, known for their robust performance, rely on this screw to maintain alignment and stability of various parts.

ISZ13 CM2150 Z105

In the ISZ13 CM2150 Z105 engine, the Studded Captive Washer Screw is utilized in securing components that are subjected to significant mechanical forces. This ensures that the engine’s internal and external parts remain tightly fastened, contributing to the overall durability and longevity of the engine.

QSK60 CM850 MCRS

The QSK60 CM850 MCRS engine also benefits from the use of the Studded Captive Washer Screw. This part is crucial in applications where high precision and reliability are required, such as in the attachment of critical engine components.

QST30 CM2350 T101

For the QST30 CM2350 T101 engine, the Studded Captive Washer Screw is used in securing various engine parts, ensuring that they remain in their intended positions under all operating conditions. This is particularly important in maintaining the engine’s structural integrity and performance.

X13 CM2670 X122B

Lastly, in the X13 CM2670 X122B engine, the Studded Captive Washer Screw is employed in securing components that are essential for the engine’s operation. This includes fastening parts that are exposed to high temperatures and pressures, ensuring that they remain securely in place throughout the engine’s lifecycle.

Role of Part 3681927 Studded Captive Washer Screw in Engine Systems

The 3681927 Studded Captive Washer Screw is integral in securing various components within engine systems, ensuring stability and proper function.

• Aftercooler System: This screw is used to fasten the aftercooler to its mounting brackets, ensuring a secure fit that allows for efficient cooling of the compressed air before it enters the engine.
• Engine Control Module (ECM): The screw is employed to attach the ECM housing to the vehicle’s chassis, providing a stable platform for the sensitive electronic components housed within.
• Engine Cooling Fan Shroud: The studded captive washer screw plays a role in attaching the shroud to the engine block or radiator, ensuring the shroud remains in place to direct airflow effectively over the radiator and other cooling components.
• Engine Oil Cooler Setup: This screw is utilized to secure the oil cooler to its mounting points, maintaining the integrity of the oil cooling process by ensuring the cooler stays firmly in position.
• Fuel Pump and Mounting: The screw is essential for attaching the fuel pump to its designated location within the fuel system, guaranteeing that the pump operates within the correct parameters and remains securely in place during engine operation.
• Oil Pan Assembly: The studded captive washer screw is used to fasten the oil pan to the engine block, ensuring a leak-proof seal and structural integrity for the oil pan, which is vital for containing the engine oil and protecting the engine’s moving parts.

Conclusion

The 3681927 Studded Captive Washer Screw by Cummins is a critical component in the mechanical assemblies of commercial trucks and various Cummins engine models. Its design ensures secure fastening of components under high stress and vibration, contributing to the durability and reliability of truck operations and engine performance.