3104701
Studded Captive Washer Screw
Cummins®

The 3104701 Studded Captive Washer Screw is a specialized fastener produced by Cummins, a well-established manufacturer in the commercial truck industry. This screw is designed for use in various applications within commercial trucks, ensuring secure and reliable fastening in demanding environments.

Basic Concepts

A Studded Captive Washer Screw is a type of fastener that includes a stud, a captive washer, and a screw. The stud provides a threaded surface for the screw to engage, while the captive washer remains attached to the stud, preventing loss during installation and operation. This design ensures consistent and reliable clamping force, which is essential in the mechanical systems of trucks ¹.

Purpose and Role

This Cummins part plays a significant role in the operation of commercial trucks by securing components that require high tensile strength and resistance to vibration. It is commonly used in applications where traditional bolts and nuts may not provide sufficient stability, such as in engine mounts, exhaust systems, and other critical assemblies. By maintaining a secure connection, it supports the overall integrity and performance of the truck’s mechanical systems ².

Key Features

The 3104701 is characterized by several key features that enhance its performance. Its design includes a robust stud made from high-strength materials, ensuring durability under heavy loads. The captive washer is engineered to distribute clamping force evenly, reducing the risk of component damage. Additionally, the screw is crafted to provide a tight and secure fit, minimizing the potential for loosening over time ³.

Benefits

The use of the 3104701 offers several benefits. Its design contributes to improved durability, ensuring long-lasting performance in harsh operating conditions. The secure fastening provided by the captive washer enhances the overall stability of truck components, leading to enhanced performance. Furthermore, the reliability of this screw can result in cost savings for fleet operators by reducing the need for frequent maintenance and replacements.

Installation Process

Proper installation of the 3104701 involves several steps to ensure correct fitting. Begin by cleaning the installation area to remove any debris or contaminants. Use the appropriate tools to insert the stud into the designated hole, ensuring it is aligned correctly. Next, thread the screw onto the stud, tightening it to the manufacturer’s specified torque settings to achieve the desired clamping force. It is important to follow best practices, such as using a torque wrench, to ensure accurate and secure installation.

Troubleshooting and Maintenance

Common issues with the 3104701 may include loosening due to vibration or corrosion. To troubleshoot these problems, inspect the screw and washer for signs of wear or damage. If corrosion is present, clean the affected areas and apply a suitable anti-corrosion treatment. Regular maintenance, such as periodic tightening and inspection, can help prolong the lifespan of the screw and ensure continued reliable performance.

Cummins Overview

Cummins is a renowned manufacturer with a rich history in the commercial truck industry. The company offers a wide range of products, including engines, powertrains, and aftermarket parts, known for their quality and reliability. Cummins’ reputation is built on a commitment to innovation, customer satisfaction, and excellence in engineering, making it a trusted name among fleet operators and truck manufacturers.

Studded Captive Washer Screw (Part 3104701) in Cummins Engines

The Studded Captive Washer Screw, identified by part number 3104701, is a critical component in the assembly of various Cummins engines. This part is integral to the structural integrity and operational efficiency of the engines, ensuring secure fastening and stability.

ISM CM570 and ISM CM876 Engines

In the ISM CM570 and ISM CM876 engines, the Studded Captive Washer Screw is utilized in several key areas. These engines, known for their robust performance and reliability, require precise and durable components to maintain their operational standards. The screw is typically employed in securing various engine components, such as mounting brackets, heat shields, and other critical parts that need to withstand high stress and thermal conditions.

ISM11 CM876 SN Engine

The ISM11 CM876 SN engine also incorporates the Studded Captive Washer Screw in its design. This engine, part of the ISM11 series, is engineered for heavy-duty applications, demanding components that can endure significant mechanical and thermal stresses. The screw is used in similar applications as in the ISM CM570 and ISM CM876 engines, ensuring that all fastened parts remain securely in place under demanding operating conditions.

Application and Importance

The Studded Captive Washer Screw is essential for maintaining the alignment and stability of engine components. Its design, featuring studs and a captive washer, provides a robust and reliable fastening mechanism. This is particularly important in engines where vibrations and thermal expansion can otherwise lead to loosening of critical connections.

Role of Part 3104701 Studded Captive Washer Screw in Engine Systems

In the intricate assembly of engine systems, the 3104701 plays a significant role in ensuring the secure attachment and proper functioning of various components.

Pan Assembly Integration

Within the pan assembly, the 3104701 is employed to fasten the pan to the engine block. This secure attachment is essential for maintaining the integrity of the oil containment system. The studded design of the screw allows it to grip firmly within the threaded holes of the pan, while the captive washer ensures a tight seal, preventing oil leaks. This component is particularly important in high-vibration environments, where the stability of the pan is paramount to the overall performance and longevity of the engine.

Oil System Components

In the oil system, the 3104701 is utilized in the attachment of oil galleries, filters, and passages. Its design facilitates a robust connection between these components and the engine block or other structural elements. The captive washer feature is beneficial in scenarios where consistent torque is required to maintain the seal integrity of oil passages, thus ensuring efficient oil flow and pressure regulation throughout the engine.

The screw’s role extends to the fastening of oil cooler lines and sensors, where it provides a secure mount that resists loosening over time, even under the dynamic conditions of engine operation. This reliability is key to maintaining optimal oil temperature and pressure, directly influencing engine performance and durability.

Conclusion

In summary, the 3104701 Studded Captive Washer Screw is a vital fastener in engine systems, contributing to the secure and efficient operation of pan assemblies and oil system components. Its design enhances the stability and seal integrity of critical engine parts, supporting the overall functionality and reliability of the engine.