3643020
Hexagon Flange Nut
Cummins®

The Cummins 3643020 Hexagon Flange Nut is a specialized fastener designed for heavy-duty truck applications. Its purpose is to provide secure and reliable fastening in environments where durability and resistance to vibration are paramount. This part is integral to maintaining the integrity of various truck components, ensuring they remain securely fastened under demanding conditions.

Basic Concepts of Hexagon Flange Nuts

A Hexagon Flange Nut is a type of fastener characterized by a hexagonal head and a flanged base. The hexagonal shape allows for easy tightening and loosening using standard tools, while the flange provides additional surface area to distribute the load and resist rotation. Mechanically, the flange enhances the nut’s ability to withstand lateral forces, making it suitable for applications where vibration and movement are common ¹.

Purpose and Role in Truck Operation

This Cummins part plays a significant role in the operation and maintenance of heavy-duty trucks. It is commonly used in applications where secure fastening is required, such as in the attachment of critical components to the chassis or engine. The flange design helps prevent the nut from loosening due to vibration, which is a common issue in heavy-duty truck environments. This nut is often found in areas such as engine mounts, exhaust systems, and other components where reliability and durability are essential ².

Key Features

The 3643020 is designed with several key features that enhance its performance and durability. Its hexagonal head allows for efficient tightening and loosening, while the flanged base provides additional stability. The nut is typically made from high-strength materials, such as alloy steel, to ensure it can withstand the rigors of heavy-duty truck applications. Additionally, the nut may feature a zinc-plated finish to provide corrosion resistance, further extending its service life in harsh operating conditions ³.

Benefits

Using the 3643020 offers several benefits. The design of the nut provides improved fastening security, reducing the risk of loosening due to vibration. This results in more reliable and safer truck operation. The high-strength material composition ensures durability, allowing the nut to withstand the demanding conditions encountered in heavy-duty truck applications. Additionally, the corrosion-resistant finish helps prolong the life of the nut, even in environments where exposure to moisture and chemicals is common.

Installation Guidelines

Proper installation of the 3643020 is crucial for ensuring optimal performance. Begin by cleaning the mating surfaces to remove any dirt or debris. Use a torque wrench to tighten the nut to the specified torque setting, which is typically provided in the vehicle’s service manual. It is important to follow the recommended torque specifications to avoid over-tightening, which can damage the nut or the component being fastened. Additionally, ensure that the flange is properly seated against the surface to maximize the nut’s stability and load-bearing capacity.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Nuts include loosening due to vibration and corrosion. To troubleshoot these issues, regularly inspect the nuts for signs of movement or rust. If a nut appears loose, re-tighten it to the specified torque setting. If corrosion is present, consider replacing the nut to prevent further degradation. Regular maintenance, such as cleaning and re-torquing, can help prolong the life of the nut and ensure reliable operation.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history dating back to 1919, Cummins has established a reputation for innovation, quality, and reliability in the automotive and heavy-duty truck industry. The company’s commitment to excellence is reflected in its wide range of products, which are designed to meet the demanding requirements of various applications, including heavy-duty trucks.

Cummins Engine Compatibility with Hexagon Flange Nut Part 3643020

The Cummins Hexagon Flange Nut part 3643020 is designed to fit a variety of Cummins engines, ensuring compatibility and reliability across different engine models. Here is a detailed look at the engines with which this part is compatible:

K-Series Engines

• K38
• K50

These K-Series engines are known for their robust design and are often used in heavy-duty applications. The Hexagon Flange Nut part 3643020 is engineered to fit seamlessly with these engines, providing a secure and durable connection.

QSK19 Series Engines

• QSK19 CM2350 K105
• QSK19 CM2350 K114
• QSK19 CM2350 K144G

The QSK19 series engines are part of Cummins’ high-performance lineup, designed for demanding applications. The Hexagon Flange Nut part 3643020 is specifically crafted to ensure a perfect fit and reliable performance with these engines.

QSK38 Series Engines

• QSK38 CM2150 MCRS
• QSK38 CM850 MCRS

The QSK38 series engines are engineered for heavy-duty tasks, offering exceptional power and efficiency. The Hexagon Flange Nut part 3643020 is compatible with these engines, providing a critical component for maintaining the integrity of the engine’s connections.

QSK50 Series Engines

• QSK50 CM2150 K107
• QSK50 CM2150 MCRS
• QSK50 CM2350 K108

The QSK50 series engines are designed for the most demanding applications, offering high performance and reliability. The Hexagon Flange Nut part 3643020 is a key component in these engines, ensuring secure and efficient operation.

By providing a comprehensive fit for a wide range of Cummins engines, the Hexagon Flange Nut part 3643020 ensures that users can maintain and repair their engines with confidence, knowing that the part is designed to meet the specific needs of each engine model.

Role of Part 3643020 Hexagon Flange Nut in Engine Systems

The part 3643020 Hexagon Flange Nut is integral in securing various components within engine systems, ensuring stability and efficient operation. It is commonly used in the fastening of the alternator to its guard, maintaining the alignment and integrity of the alternator’s position relative to the engine. This nut is also pivotal in the arrangement of the crankcase breather, where it secures the breather to the engine block, facilitating the release of gases while preventing oil leakage.

In the context of the belt guard bracket, the Hexagon Flange Nut ensures that the bracket remains firmly attached to the engine frame, protecting the serpentine belt from external damage and ensuring consistent belt tension. Similarly, for the compressor guard, this nut plays a role in securing the guard to the compressor, safeguarding the compressor from debris and ensuring its operational efficiency.

The nut is also utilized in the harness and electronic control module wiring package, where it secures wiring harnesses to the engine or chassis, preventing wire chafing and ensuring electrical integrity. In the arrangement of guards and plumbing around the turbocharger, the Hexagon Flange Nut is employed to fasten guards that protect the turbocharger from heat and debris, as well as to secure plumbing connections, ensuring a leak-free system.

Furthermore, in the pump and fuel system, this nut is used to secure fuel lines and pump components, ensuring a secure and leak-free connection. Lastly, in the vibration isolator bracket, the Hexagon Flange Nut is essential for securing the bracket to the engine or chassis, mitigating engine vibrations and ensuring a smooth operation of the engine system.

Conclusion

The Cummins 3643020 Hexagon Flange Nut is a critical component in heavy-duty truck and engine systems, providing secure and reliable fastening in demanding environments. Its design, featuring a hexagonal head and flanged base, enhances stability and resistance to vibration. Made from high-strength materials and often zinc-plated for corrosion resistance, this part ensures durability and prolonged service life. Proper installation and regular maintenance are essential to maximize its performance and reliability.