4991105
Regular Hexagon Nut
Cummins®

The 4991105 Regular Hexagon Nut, manufactured by Cummins, is a specialized fastener designed for use in commercial truck applications. Cummins, a well-established name in the automotive and heavy-duty truck industry, produces this nut to meet the demanding requirements of truck assembly and maintenance. This part is integral to ensuring secure and reliable fastening in various truck components.

Basic Concepts of Regular Hexagon Nuts

A regular hexagon nut is a type of fastener characterized by its six-sided shape. This design allows for efficient use of wrenches and socket tools, providing a firm grip that facilitates easy tightening and loosening ¹. The hexagonal shape is advantageous over other nut designs because it minimizes the risk of the tool slipping off during use, which can lead to damage or improper fastening. Additionally, the uniform distribution of force across the six sides enhances the nut’s ability to withstand high torque applications ².

Purpose of the 4991105 Regular Hexagon Nut in Truck Operations

This Cummins part plays a significant role in the assembly and maintenance of commercial trucks. It is commonly used in applications where secure and durable fastening is required, such as in engine components, chassis assemblies, and various mechanical systems. This nut ensures that critical parts remain firmly in place, contributing to the overall safety and performance of the truck ³.

Key Features

The 4991105 Regular Hexagon Nut is crafted from high-quality materials, typically alloy steel, to ensure durability and strength. It features a specific thread size designed to match the fasteners it is intended to secure. Additionally, the nut may include special coatings or treatments, such as zinc plating, to enhance its corrosion resistance and prolong its service life.

Benefits

Using the 4991105 Regular Hexagon Nut offers several benefits. Its design allows for improved load distribution, which helps prevent loosening over time. The nut’s compatibility with a variety of fasteners makes it a versatile choice for different applications. Furthermore, its robust construction ensures reliability under the demanding conditions encountered in commercial truck operations.

Installation Guidelines

Proper installation of the 4991105 Regular Hexagon Nut is crucial for ensuring its effectiveness. To install, use the appropriate wrench or socket tool to tighten the nut to the specified torque settings. It is recommended to use a torque wrench to achieve the precise torque required for the application. Following the manufacturer’s guidelines for torque specifications will help maintain the integrity of the fastening and prevent over-tightening or under-tightening.

Troubleshooting and Maintenance

Common issues with regular hexagon nuts include loosening due to vibration or corrosion. To troubleshoot, inspect the nut and fastener for signs of wear or damage. If corrosion is present, cleaning the affected areas and reapplying a suitable lubricant or anti-seize compound can help. Regular maintenance, such as periodic checks for tightness and condition, will ensure the longevity and reliability of the 4991105 Regular Hexagon Nut.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history dating back to 1919, Cummins has built a reputation for innovation, quality, and reliability. The company’s product range includes engines for on-highway and off-highway applications, as well as components and technologies that enhance performance and efficiency in various industries. Cummins’ commitment to excellence is evident in its extensive lineup of parts and accessories, including the 4991105 Regular Hexagon Nut, which is designed to meet the rigorous demands of commercial truck operations.

Cummins Engine Part 4991105: Regular Hexagon Nut Compatibility

The Cummins Regular Hexagon Nut part number 4991105 is a versatile component that fits into various engine models. This part is designed to provide a secure fastening solution, ensuring that engine components remain tightly connected and operational. Below is a detailed look at how this part integrates with different Cummins engines.

6C8.3

The 6C8.3 engine benefits from the Regular Hexagon Nut 4991105 in several critical areas. This part is often used in the engine’s mounting system, securing various brackets and supports that maintain the engine’s structural integrity.

ISBE CM2150 and ISL9 CM2150 SN

Both the ISBE CM2150 and ISL9 CM2150 SN engines utilize the Regular Hexagon Nut 4991105 in their accessory drive systems. This part is crucial for fastening components such as pulleys and tensioners, ensuring that the engine’s ancillary systems operate smoothly.

ISBE4 CM850 and L8.9G CMOH2.0 L125B

In the ISBE4 CM850 and L8.9G CMOH2.0 L125B engines, the Regular Hexagon Nut 4991105 is employed in the fuel injection system. This part helps secure injectors and related components, ensuring precise fuel delivery and optimal engine performance.

ISL9.5 CM2880 L138

The ISL9.5 CM2880 L138 engine incorporates the Regular Hexagon Nut 4991105 in its exhaust system. This part is essential for fastening exhaust components, maintaining the system’s integrity and efficiency.

L8.9 and L9 CM2670 L128B

For the L8.9 and L9 CM2670 L128B engines, the Regular Hexagon Nut 4991105 is used in the engine’s cooling system. This part helps secure radiators, hoses, and other cooling components, ensuring that the engine operates within its optimal temperature range.

By understanding the specific applications of the Regular Hexagon Nut 4991105 across these engines, technicians and mechanics can ensure proper installation and maintenance, contributing to the overall reliability and performance of Cummins engines.

Role of Part 4991105 Regular Hexagon Nut in Engine Systems

The part 4991105 Regular Hexagon Nut is integral to the assembly and securement of various components within engine systems. It is commonly used in the fastening of the front engine support to the engine block. This nut ensures that the front engine support remains firmly attached, which is essential for maintaining the structural integrity and alignment of the engine within the vehicle.

In addition to its role in the front engine support, the 4991105 Regular Hexagon Nut is also utilized in securing other support structures that are critical for the engine’s operation. These supports help in absorbing vibrations and ensuring that the engine remains stable during operation. The nut’s hexagonal shape allows for efficient torque application, making it easier for mechanics to tighten or loosen as needed without slipping.

Furthermore, the nut is employed in various other fastening applications throughout the engine system. It is often found in the attachment of brackets, mounts, and other ancillary components that contribute to the engine’s overall performance and durability. Its reliable fastening capability ensures that these components remain in place under the stress of engine operation, thereby contributing to the longevity and efficiency of the engine system.

Conclusion

The 4991105 Regular Hexagon Nut is a critical component in the assembly and maintenance of commercial trucks and Cummins engines. Its robust design, compatibility with various fasteners, and reliable performance make it an essential part for ensuring the structural integrity and operational efficiency of truck and engine systems. Proper installation, regular maintenance, and understanding its specific applications across different engine models are key to maximizing the benefits of this Cummins part.