3928873
Hexagon Flange Head Cap Screw
Cummins®

The Cummins Hexagon Flange Head Cap Screw, part number 3928873, is a vital component in commercial truck applications. This screw is essential for the assembly and maintenance of truck components, contributing to both structural integrity and operational efficiency. Its design and functionality are tailored to meet the demanding requirements of heavy-duty truck environments ¹.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flanged base. The hexagonal head allows for efficient tightening and loosening using a wrench, while the flange provides a larger bearing surface that distributes load more effectively, reducing the risk of damage to the fastened material. Flange head screws are commonly used in applications where a combination of secure fastening and resistance to loosening is required ².

Purpose and Function

In the context of a commercial truck, the 3928873 Hexagon Flange Head Cap Screw serves to securely fasten various components. It is integral to the assembly process, ensuring that parts remain firmly in place under the dynamic conditions experienced by trucks. This screw helps maintain the structural integrity of the truck, contributing to its overall operational efficiency by preventing component misalignment or failure ³.

Key Features

The 3928873 Hexagon Flange Head Cap Screw features a hexagonal head that facilitates easy access with standard wrenches, allowing for precise torque application. The flange at the base of the screw provides an increased bearing surface, which helps in distributing the load more evenly across the fastened material. Additionally, the cap screw design ensures a secure and tight fit, which is crucial for maintaining the integrity of truck components.

Benefits

Using the 3928873 Hexagon Flange Head Cap Screw in truck maintenance and assembly offers several advantages. Its design enhances durability, making it resistant to loosening over time, even under vibrations typical in truck operations. The ease of installation and removal is another benefit, allowing for efficient maintenance procedures. Furthermore, the screw’s robust construction contributes to the longevity and reliability of the fastened components.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws may include loosening due to vibrations or corrosion. To address these, regular inspections are recommended to ensure screws remain tight and free of corrosion. Maintenance practices such as applying an anti-seize compound can help prevent corrosion and facilitate easier removal in the future. Additionally, using the correct torque specifications during installation can prevent over-tightening, which may lead to screw or material damage.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history rooted in diesel engine technology, Cummins has expanded its expertise to include a wide range of power solutions. The company is committed to quality, innovation, and sustainability, providing reliable and efficient products for various industries, including commercial trucking.

Cummins Engine Hexagon Flange Head Cap Screw (Part 3928873)

The Cummins part number 3928873, a Hexagon Flange Head Cap Screw, is a critical component used across a variety of Cummins engine models. This screw is integral in securing various parts within the engine assembly, ensuring that components remain tightly fastened and properly aligned. Below is a detailed look at the engines that utilize this particular screw, grouped by engine series for clarity.

4B Series Engines

• 4B3.9: This engine benefits from the 3928873 screw in securing the cylinder head cover, ensuring a tight seal and proper alignment of the head bolts.

6B Series Engines

• 6B5.9: The 3928873 screw is used in the 6B5.9 engine to fasten the turbocharger housing and other critical components, maintaining the structural integrity of the engine.

6C Series Engines

• 6C8.3: This engine employs the 3928873 screw in securing the valve cover, ensuring that the engine’s internal components are properly sealed and aligned.

A Series Engines

• A1400, A1700, A2000, A2300: These smaller engines use the 3928873 screw in various applications, including securing the intake manifold and other auxiliary components.

B Series Engines

• B3.3, B3.9 G, B4.5, B4.5 RGT, B5.6 CM2670 B152B, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556, B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C, B6.7 G CMOH6.0 B125, B6.7S: The B series engines, which range from smaller to larger configurations, utilize the 3928873 screw in numerous applications. These include securing the cylinder head cover, valve cover, and other critical engine components. The screw’s versatility and strength make it suitable for the demanding environments within these engines.

C Series Engines

• C GAS PLUS CM556: This engine uses the 3928873 screw in securing the turbocharger housing and other critical components, ensuring the engine operates efficiently and reliably.

D Series Engines

• D4.0 CM2620 D103B: The 3928873 screw is used in the D4.0 engine to fasten the cylinder head cover, ensuring a tight seal and proper alignment of the head bolts.

F Series Engines

• F3.8 CM2350 F128C, F3.8 CM2620 F137B: These engines utilize the 3928873 screw in securing the intake manifold and other auxiliary components, ensuring that the engine’s internal components are properly sealed and aligned.

The use of the 3928873 Hexagon Flange Head Cap Screw across these various Cummins engine models highlights its importance in maintaining the structural integrity and operational efficiency of the engines.

Role of Part 3928873 Hexagon Flange Head Cap Screw in Engine Systems

The 3928873 Hexagon Flange Head Cap Screw is instrumental in securing and maintaining the integrity of various engine components. Its robust design ensures a tight and reliable fit, which is essential for the proper functioning of the engine system.

Accessory Drive Kit

In the accessory drive kit, the Hexagon Flange Head Cap Screw is used to fasten components such as pulleys, tensioners, and brackets. This ensures that these accessories remain securely attached to the engine, allowing for efficient operation of systems like the alternator, air conditioning compressor, and power steering pump.

Air Intake System

For the air intake connection and air intake manifold, this screw plays a vital role in maintaining airtight seals. It secures the manifold to the cylinder block and ensures that the air intake system operates efficiently without leaks, which is crucial for optimal engine performance.

Fuel System

Within the fuel control module and fuel injection pump, the Hexagon Flange Head Cap Screw is employed to secure critical components. It ensures that the fuel system remains intact, allowing for precise fuel delivery and maintaining the engine’s performance and efficiency.

Lubrication System

In the lubricating oil pump kit, this screw is used to fasten the pump to the engine block. Proper securing is essential to ensure that the lubrication system functions correctly, providing necessary oil flow to engine components and reducing wear and tear.

Cooling System

The thermostat housing and water pump drive rely on the Hexagon Flange Head Cap Screw to maintain a secure connection. This is important for the efficient circulation of coolant, which helps in regulating engine temperature and preventing overheating.

Turbocharger System

For the turbocharger arrangement and plumbing, this screw is used to secure turbocharger components and ensure that all connections are tight. This is important for maintaining the turbocharger’s efficiency and the overall performance of the engine.

Other Applications

Additionally, the screw is utilized in the cylinder block, cylinder block cover, engine balancer, engine installation kit, fuel supply plumbing, fuel transfer pump, intake connection mounting, lifting bracket mounting, muffler, oil pan, performance parts, rocker lever, and XPI JV System Cummins MR. Each application requires the screw to provide a strong, reliable connection, ensuring that all engine components work in harmony.

Conclusion

The Cummins Hexagon Flange Head Cap Screw, part number 3928873, is a critical component in the assembly and maintenance of commercial truck engines. Its robust design and functionality ensure secure fastening and resistance to loosening, contributing to the structural integrity and operational efficiency of the engines. Regular maintenance and proper installation practices are essential to maximize the benefits of this part.