3896790
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3896790, is a component manufactured by Cummins, a well-established name in the commercial truck industry. This screw plays a significant role in the maintenance and operation of commercial trucks, ensuring the secure fastening of various components. Its design and functionality are tailored to meet the demanding requirements of heavy-duty applications.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and a flange—a flat, circular plate—attached to the underside of the head. This design allows for efficient torque application and provides a larger bearing surface, which helps distribute the load more evenly. Within mechanical systems, these screws are used to secure components that require a high degree of stability and resistance to vibration ¹.

Role in Truck Operation

In the context of a commercial truck, the 3896790 Hexagon Flange Head Cap Screw serves to fasten critical components that are subject to significant stress and vibration. It is commonly used in applications where the screw needs to withstand high torque and provide a secure connection. Examples include securing engine components, transmission parts, and chassis elements. The flange design ensures that the screw remains tightly fastened, even under dynamic conditions ².

Key Features

The 3896790 Hexagon Flange Head Cap Screw boasts several primary features that make it suitable for heavy-duty applications. Its hexagonal head allows for easy and efficient tightening using standard tools, reducing the risk of cam-out. The flange provides additional stability and load distribution, enhancing the screw’s performance in high-stress environments. Additionally, the screw is typically made from high-strength materials, ensuring durability and resistance to corrosion ³.

Benefits

Using the 3896790 Hexagon Flange Head Cap Screw offers several advantages. Its design contributes to enhanced durability, making it well-suited for the rigors of commercial truck operation. The flange provides additional resistance to vibration, ensuring that the screw remains securely fastened over time. Furthermore, the hexagonal head allows for straightforward installation and removal, facilitating maintenance procedures.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws may include loosening due to vibration or corrosion. Regular inspection and tightening can help mitigate these problems. If corrosion is detected, it may be necessary to replace the screw to ensure continued secure fastening. Additionally, using the correct torque specifications during installation can prevent over-tightening, which could lead to screw failure.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation for quality and reliability in the commercial truck industry. The company offers a comprehensive range of products designed to meet the needs of various applications, from on-highway to off-highway and industrial uses. Cummins’ commitment to innovation and customer satisfaction has made it a trusted name in the industry.

Hexagon Flange Head Cap Screw (Part 3896790) in Cummins Engines

The Hexagon Flange Head Cap Screw, identified by the part number 3896790, is a critical component in various Cummins engines. This screw is designed to provide secure fastening in applications where a robust and reliable connection is essential. Here’s how it integrates with different Cummins engine models:

ISM Series Engines

• ISM CM570
• ISM CM570/870
• ISM CM876
• ISM11 CM876 SN
• QSM11 CM570
• QSM11 CM876

The ISM series engines, known for their durability and efficiency, utilize the 3896790 screw in various applications. This screw is often employed in securing components within the engine’s architecture, ensuring that parts remain tightly fastened under operational stresses.

ISX Series Engines

• ISX12 CM2350 X102
• ISX12 G CM2180 EJ
• ISX12/ISX11.9 CM2250

In the ISX series, the 3896790 screw is integral to maintaining the structural integrity of the engine. These engines, designed for heavy-duty applications, benefit from the screw’s ability to withstand high torque and pressure, ensuring that critical engine components remain securely fastened.

L10 Series Engines

• L10 CELECT
• L10 GAS
• L10 MECHANICAL

The L10 series engines, which cater to a range of applications from marine to industrial use, incorporate the 3896790 screw in their design. This screw is used to secure various engine parts, ensuring that the engine operates smoothly and efficiently.

M11 Series Engines

• M11 CELECT
• M11 CELECT PLUS
• M11 MECHANICAL

The M11 series engines, known for their versatility and performance, also utilize the 3896790 screw. This screw is essential in securing components within these engines, providing the necessary stability and reliability for various applications.

QSX Series Engines

• QSX11.9 CM2250 ECF

The QSX series engines, designed for on-highway applications, incorporate the 3896790 screw in their design. This screw ensures that critical engine components remain securely fastened, contributing to the engine’s overall performance and longevity.

Role of Part 3896790 Hexagon Flange Head Cap Screw in Engine Systems

The part 3896790 Hexagon Flange Head Cap Screw is instrumental in ensuring the secure assembly and operation of various engine components.

Crankshaft Seal Replacer

In the process of replacing a crankshaft seal, the Hexagon Flange Head Cap Screw provides the necessary clamping force to hold the seal in place, ensuring a tight fit that prevents oil leaks and maintains the integrity of the seal.

Cylinder Block Kit

When assembling a cylinder block kit, these screws are used to fasten various components to the block, such as brackets, sensors, and auxiliary parts. Their flanged head design offers additional surface area for a more secure attachment, reducing the risk of loosening over time.

Damper and Vibration Control

For components like dampers that are designed to reduce vibration, the Hexagon Flange Head Cap Screw ensures that the damper is firmly attached to the engine block or other mounting points. This secure attachment is essential for the damper to effectively absorb vibrations and maintain smooth engine operation.

Engine Rotating Adapter

In applications where an engine rotating adapter is used, these screws play a key role in attaching the adapter to the engine. This ensures that the adapter remains stable during engine rotation, which is vital for the accurate measurement of engine performance parameters.

Flywheel

The flywheel, a component that stores rotational energy, often requires secure fastening to the crankshaft. The Hexagon Flange Head Cap Screw provides the required strength and stability to keep the flywheel in place, ensuring consistent engine performance and reliable energy transfer.

Conclusion

The 3896790 Hexagon Flange Head Cap Screw is a vital component in the maintenance and operation of commercial trucks and various Cummins engines. Its robust design, reliable performance, and key features make it an essential part of the engine assembly, ensuring that various engine components remain securely fastened under operational stresses.