4981915
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw (Part #4981915) by Cummins is a specialized fastener designed for use in commercial truck applications, particularly in heavy-duty trucks. This screw plays a significant role in ensuring the secure fastening of various components within the truck’s structure. Cummins Inc., a leading manufacturer in the commercial vehicle industry, produces this part, leveraging its extensive expertise in diesel engines and related technologies to deliver high-quality fastening solutions.

Basic Concepts

The Hexagon Flange Head Cap Screw is characterized by its hexagonal head, which allows for easy access with standard wrenches, and its flange, which provides a larger bearing surface. This design enhances the screw’s functionality in fastening applications by distributing the load more effectively and reducing the risk of damage to the fastened material. Commonly made from high-strength materials such as alloy steel, these screws are engineered to withstand the rigors of heavy-duty truck operations.

Purpose and Application

The primary purpose of the 4981915 Hexagon Flange Head Cap Screw in truck operations is to provide secure and reliable fastening for various components and assemblies. It is used in critical applications where the structural integrity and safety of truck components are paramount. These screws are often found in engine assemblies, chassis components, and other areas where vibration and dynamic loads are present. The secure fastening provided by these screws helps maintain the structural integrity of the truck, ensuring safe and efficient operation.

Key Features

The 4981915 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance in heavy-duty applications. The hexagonal head allows for straightforward installation and removal using standard tools, while the flange provides a larger bearing surface that helps distribute the load more evenly. The cap screw design offers enhanced security and resistance to vibration, making it ideal for use in dynamic environments. Additionally, the screw’s material composition ensures durability and reliability under demanding conditions.

Benefits

Using the 4981915 Hexagon Flange Head Cap Screw offers several benefits. Its design provides improved fastening strength, making it less likely to loosen over time compared to standard screws. The flange head feature enhances the screw’s resistance to loosening, even in applications subject to significant vibration. Ease of installation and removal is another advantage, thanks to the hexagonal head, which allows for quick and efficient fastening. Furthermore, the screw’s durability and reliability in heavy-duty applications ensure long-term performance and reduced maintenance requirements.

Troubleshooting and Maintenance

Common issues with the 4981915 Hexagon Flange Head Cap Screw may include loosening or corrosion. To address these problems, regular inspections are recommended to ensure the screws remain tight and free from corrosion. Proper torque settings during installation are crucial to prevent over-tightening, which can lead to damage, or under-tightening, which can result in loosening. Maintenance tips include applying an appropriate anti-corrosion coating and using lock washers or thread lockers to enhance the screw’s resistance to vibration and loosening.

Cummins Overview

Cummins Inc. is a globally recognized leader in the commercial vehicle industry, with a rich history of innovation and quality. The company specializes in diesel engines and related technologies, providing solutions that enhance the performance, efficiency, and reliability of commercial vehicles. Cummins’ commitment to quality and innovation is evident in its wide range of products, including the 4981915 Hexagon Flange Head Cap Screw, which is designed to meet the demanding requirements of heavy-duty truck applications.

Cummins Engine Part 4981915: Hexagon Flange Head Cap Screw

The Cummins part number 4981915, a Hexagon Flange Head Cap Screw, is a versatile component utilized across a variety of Cummins engines. This screw is designed to secure components in place, ensuring structural integrity and operational efficiency. Below is a detailed breakdown of how this part fits into various Cummins engines:

B5.6 and B6.7 Series Engines

• B5.6 CM2670 B152B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• L8.9 CM2670 L134C
• L8.9G CMOH2.0 L125B

These engines, part of the B5.6 and B6.7 series, utilize the Hexagon Flange Head Cap Screw to secure various components, including cylinder heads and engine blocks. The screw’s flange head design provides a larger bearing surface, distributing the load more evenly and preventing damage to the fastened parts.

ISB Series Engines

• ISB CM2150
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118
• ISL CM2150
• ISL G CM2180
• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

The ISB and ISL series engines benefit from the Hexagon Flange Head Cap Screw in securing critical components such as intake manifolds, exhaust manifolds, and other structural parts. The screw’s design ensures a tight and reliable connection, which is crucial for maintaining engine performance and longevity.

ISBE and ISC Series Engines

• ISBE CM2150
• ISBE4 CM850
• ISC CM850

These engines, including the ISBE and ISC series, use the Hexagon Flange Head Cap Screw to fasten various components, including those related to the engine’s cooling and lubrication systems. The screw’s ability to provide a secure and stable connection is essential for the proper functioning of these systems.

QSB Series Engines

• QSB4.5 CM2250 EC
• QSB4.5 CM850(CM2850)
• QSB5.9 CM850
• QSB6.7 CM2250
• QSB6.7 CM2350 B105
• QSB6.7 CM850(CM2850)
• QSB7 CM2880 B117

The QSB series engines, known for their durability and performance, incorporate the Hexagon Flange Head Cap Screw in securing components such as fuel injectors, turbochargers, and other critical parts. The screw’s design ensures that these components remain securely fastened under various operating conditions.

L GAS PLUS Series Engine

• L GAS PLUS CM556

This specialized engine uses the Hexagon Flange Head Cap Screw to secure components related to its gas-powered operation. The screw’s design provides the necessary stability and security for these components, ensuring the engine operates efficiently and reliably.

Hexagon Flange Head Cap Screw (Part 4981915) Component Usage

The Hexagon Flange Head Cap Screw, identified by part number 4981915, is an essential fastener utilized in various engine systems to ensure the secure assembly of multiple components. Its design and functionality are integral to maintaining the structural integrity and operational efficiency of the engine.

Cover Assembly

In the cover assembly, the Hexagon Flange Head Cap Screw is employed to fasten the cover to the engine block. This secure attachment is vital for containing engine components and preventing oil leaks. The flange head of the screw provides additional surface area for a more robust connection, reducing the risk of loosening over time due to vibrations.

Front Gear Attachment

When attaching the front gear to the engine, the Hexagon Flange Head Cap Screw plays a significant role. It ensures that the gear is held firmly in place, allowing for precise alignment and smooth operation. The screw’s hexagonal head facilitates easy tightening and loosening using standard tools, ensuring that maintenance tasks can be performed efficiently.

Gear Housing Integration

The gear housing, which encases the gears and provides a protective environment, relies on the Hexagon Flange Head Cap Screw for secure attachment to the engine block. This connection is essential for maintaining the housing’s position and integrity, which in turn protects the gears from external contaminants and ensures optimal performance.

Pan Securing

The engine pan, which collects and stores oil, is another component where the Hexagon Flange Head Cap Screw is utilized. By securing the pan to the engine block, the screw helps maintain a sealed environment for the oil, preventing leaks and ensuring that the lubrication system functions correctly. The flange head offers enhanced stability, which is particularly important given the pan’s exposure to dynamic engine movements.

Oil System Components

In the oil system, the Hexagon Flange Head Cap Screw is used to attach various components such as oil filters, sensors, and passages. These attachments are crucial for the proper functioning of the oil circulation system, ensuring that oil is efficiently distributed throughout the engine to lubricate moving parts and maintain optimal temperature.

Conclusion

Overall, the Hexagon Flange Head Cap Screw (part 4981915) is a versatile and reliable fastener that contributes to the secure and efficient operation of multiple engine components. Its design enhances the stability and durability of connections, playing a significant role in the overall performance and longevity of the engine system. ¹²³

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