3251659
Regular Hexagon Nut
Cummins®

The Cummins Part #3251659 Regular Hexagon Nut is a specialized fastener designed for use in commercial trucks. It serves a role in the assembly and maintenance of various truck components, ensuring secure and reliable connections. Understanding its purpose and significance is key to maintaining the efficiency and safety of commercial vehicles.

Basic Concepts of Regular Hexagon Nuts

A regular hexagon nut is characterized by its six-sided shape, which provides a stable and uniform surface for tools to grip. This design enhances the ease of installation and removal using common hand tools, such as wrenches or sockets. The hexagonal shape distributes force evenly across the nut, reducing the risk of rounding off the edges during tightening or loosening. This design is particularly advantageous in high-torque applications, where secure fastening is paramount ¹.

Purpose and Role in Truck Operation

This Cummins part plays a specific role in the operation and maintenance of commercial trucks. It is commonly used in applications where secure fastening is required, such as in engine components, chassis assemblies, and various mechanical systems. Its importance lies in its ability to provide a strong, durable connection that can withstand the rigors of heavy-duty truck operation ².

Key Features

This part is crafted from high-quality materials, ensuring durability and resistance to corrosion. It features a precise thread type that matches the specifications of the components it is designed to fasten. Unique design elements, such as a chamfered edge, enhance its performance by facilitating easier installation and reducing the likelihood of cross-threading ³.

Benefits

Utilizing the Regular Hexagon Nut offers several benefits. Its design contributes to improved fastening security, minimizing the risk of loosening over time. The nut’s resistance to corrosion and wear ensures longevity, even in harsh operating conditions. These qualities make it a reliable choice for maintaining the integrity of truck components ⁴.

Installation Guidelines

Proper installation of this part is crucial for ensuring secure fastening. It should be installed using the appropriate torque specifications to achieve the desired tension without over-tightening, which could damage the nut or the fastened components. Best practices include using the correct tools and following a systematic approach to installation to ensure consistency and reliability ⁵.

Troubleshooting and Maintenance

Common issues with regular hexagon nuts include loosening due to vibration or inadequate torque, and corrosion in exposed applications. Troubleshooting these issues involves checking torque settings, inspecting for signs of wear or damage, and applying appropriate coatings or treatments to prevent corrosion. Regular maintenance, such as periodic tightening and condition assessment, can prolong the life of the nut and ensure continued reliable performance ⁶.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history of innovation and quality, Cummins plays a significant role in the commercial trucking industry by providing reliable components that enhance the performance and durability of trucks. Their commitment to excellence ensures that parts like the Regular Hexagon Nut meet the high standards required for heavy-duty applications ⁷.

Cummins Regular Hexagon Nut 3251659 Compatibility

The Regular Hexagon Nut part number 3251659 is a versatile component designed to fit a variety of Cummins engines. This part is engineered to meet the rigorous demands of engine assembly and maintenance, ensuring reliable performance across different engine models.

ISM Series Engines

The ISM CM570, ISM CM570/870, ISM CM876 engines are part of Cummins’ Intelligent Systems Management (ISM) series, known for their advanced technology and efficiency. The Regular Hexagon Nut 3251659 is compatible with these engines, providing a secure fastening solution for various components.

L10 Series Engines

The L10 CELECT and L10 MECHANICAL engines are robust and reliable, often used in heavy-duty applications. The Regular Hexagon Nut 3251659 fits seamlessly with these engines, ensuring proper assembly and maintenance.

M11 Series Engines

The M11 CELECT, M11 CELECT PLUS, and M11 MECHANICAL engines are designed for versatility and performance. The Regular Hexagon Nut 3251659 is a component in these engines, providing the necessary strength and durability for various applications.

N14 Series Engines

The N14 MECHANICAL engine is a staple in the heavy-duty market, known for its durability and power. The Regular Hexagon Nut 3251659 is compatible with this engine, ensuring reliable fastening in demanding conditions.

QSB Series Engines

The QSB4.5 CM2250 EC, QSB4.5 CM850 (CM2850), QSB7 CM2880 B117 engines are part of Cummins’ Quantum Series B (QSB) line, designed for a range of applications. The Regular Hexagon Nut 3251659 fits these engines, providing a secure fastening solution.

QSK Series Engines

The QSK19 CM850 MCRS, QSK50 CM2150 K107, QSK50 CM2150 MCRS, QSK60 CM500, QSK60 CM850 MCRS, QSK78 CM500 engines are part of Cummins’ Quantum Series K (QSK) line, known for their high performance and reliability. The Regular Hexagon Nut 3251659 is compatible with these engines, ensuring proper assembly and maintenance.

QSM Series Engines

The QSM11 CM570 engine is part of Cummins’ Quantum Series M (QSM) line, designed for specific applications. The Regular Hexagon Nut 3251659 fits this engine, providing a secure fastening solution.

V903 Engine

The V903 engine is a high-performance model, often used in demanding applications. The Regular Hexagon Nut 3251659 is compatible with this engine, ensuring reliable fastening in challenging conditions.

X12 Series Engines

The X12 CM2670 X121B engine is part of Cummins’ X Series line, known for its versatility and performance. The Regular Hexagon Nut 3251659 fits this engine, providing a secure fastening solution.

This compatibility ensures that the Regular Hexagon Nut 3251659 can be used across a wide range of Cummins engines, providing a reliable and secure fastening solution for various components.

Role of Part 3251659 Regular Hexagon Nut in Engine Systems

The Part 3251659 Regular Hexagon Nut is integral to the secure assembly and operation of various engine components. Its applications span across multiple systems, ensuring stability and reliability.

Air and Fuel Systems

In the air restriction indicator mounting, the Regular Hexagon Nut secures the indicator to the engine, allowing for precise monitoring of air flow restrictions. Similarly, in the air cleaner assembly, it ensures a tight seal, preventing air leaks that could affect engine performance.

For the fuel system, the nut is used in the fuel pump plumbing and fuel tubing connections. It secures the fuel supply mounting and fuel shutoff valve, ensuring a leak-free connection critical for safe and efficient fuel delivery. Additionally, it plays a role in the fuel filter assembly, maintaining the integrity of the filtration process.

Engine and Control Systems

In the engine control module and fuel control module, the Regular Hexagon Nut is employed to secure wiring braces and protective covers. This ensures that electrical connections remain stable and protected from vibrations.

Cooling and Ignition Systems

The nut is also vital in the radiator system, where it secures tubing and connections, ensuring efficient coolant flow. In the ignition system, it is used to mount the level sensor, providing accurate readings for system management.

Structural and Support Components

For structural integrity, the Regular Hexagon Nut is utilized in the fan support and drive fan assemblies. It secures the fan to the engine, ensuring it operates smoothly without wobbling. Additionally, it is used in the tube brace and manifold pressure valve connections, contributing to the overall stability of the engine system.

Lubrication and Transmission

In the lubricating oil system, the nut secures connections in the fuel filter and fuel tubing, ensuring a consistent supply of lubricant to moving parts. In the transmission system, it is used to mount control rods, ensuring precise control and operation of transmission components.

Miscellaneous Applications

The Regular Hexagon Nut is also found in the EBM (Engine Bay Module) tubing connections, securing various components and ensuring the integrity of the engine bay setup.

Overall, the Part 3251659 Regular Hexagon Nut is a versatile component that enhances the reliability and performance of engine systems through secure and stable connections.

Conclusion

The Cummins Part #3251659 Regular Hexagon Nut is a critical component in the maintenance and operation of commercial trucks. Its design, featuring a six-sided shape and precise threading, ensures secure and reliable fastening across a variety of applications. The nut’s compatibility with multiple Cummins engine models underscores its versatility and importance in engine systems. Proper installation and maintenance of this part are essential for the continued efficiency and safety of commercial vehicles.