3902023
Hexagon Flange Head Cap Screw
Cummins®

Introduction

The Hexagon Flange Head Cap Screw, identified by part number 3902023, is a specialized fastener produced by Cummins, a leading manufacturer in the commercial vehicle industry. This screw is significant in the maintenance and operation of commercial trucks, providing a reliable fastening solution that meets the demanding requirements of heavy-duty applications.

Basic Concepts and Functionality

The Hexagon Flange Head Cap Screw is designed with a hexagonal head and a flanged base. The hexagonal head allows for efficient tightening and loosening using a wrench, ensuring secure fastening. The flange provides additional surface contact, which helps distribute the load more evenly and prevents the screw from pulling through the material. Typically constructed from high-strength materials such as alloy steel, this screw is engineered to withstand significant stress and environmental conditions. Its operation within a fastening system involves securing components together under tension, which is crucial for the integrity and safety of truck assemblies ¹.

Role in Truck Operation

The 3902023 Hexagon Flange Head Cap Screw plays a vital role in the operation and maintenance of commercial trucks. It is used in various truck components and systems, including engine mounts, chassis assemblies, and body panels. By providing a secure and stable connection, this screw helps maintain the structural integrity of these components, ensuring they function correctly under the rigors of heavy-duty use. Its application extends to both static and dynamic parts of the truck, making it a versatile fastener in truck maintenance ².

Key Features

The 3902023 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance and reliability. The hexagonal head offers superior wrench accessibility, allowing for precise torque application. The flange provides added surface contact, which improves load distribution and reduces the risk of the screw pulling through the material. Additionally, the screw is made from materials that offer enhanced durability and resistance to corrosion, making it suitable for the harsh environments typical of commercial truck operations ³.

Benefits

Using the 3902023 Hexagon Flange Head Cap Screw offers several benefits. It provides improved fastening security, ensuring that components remain firmly in place even under significant stress. The design allows for ease of installation and removal, which is beneficial during maintenance procedures. Furthermore, its material properties contribute to its longevity, making it a cost-effective solution in demanding environments.

Troubleshooting and Maintenance

Common issues associated with Hexagon Flange Head Cap Screws include loosening due to vibration and corrosion from exposure to moisture and chemicals. Regular maintenance practices can help ensure the longevity and reliable performance of these screws. Inspections should be conducted to check for signs of wear, corrosion, or loosening. Proper torque settings should be applied during installation to prevent over-tightening or under-tightening. If corrosion is detected, the affected screws should be replaced to maintain the integrity of the fastening system.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including diesel and natural gas engines, as well as related technologies. With a history spanning over a century, Cummins has established itself as a trusted name in the commercial vehicle industry. The company is committed to quality and innovation, continually advancing its product offerings to meet the evolving needs of its customers. Cummins’ expertise in engine and component manufacturing ensures that its fasteners, like the 3902023 Hexagon Flange Head Cap Screw, are designed to deliver reliable performance in demanding applications.

Cummins Engine Compatibility with Part 3902023

The Hexagon Flange Head Cap Screw part number 3902023, manufactured by Cummins, is designed to fit a variety of Cummins engines. This screw is integral in securing various engine components, ensuring structural integrity and operational efficiency. Below is a detailed breakdown of the engines compatible with this part:

15N Series

• 15N CM2380 M104B

4B Series

• 4B3.9

6B Series

• 6B5.9
• 6C8.3

B4.5 Series

• B4.5 CM2350 B129B
• B4.5 RGT

B5.6 Series

• B5.6 CM2670 B152B

B6.7 Series

• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 G CMOH6.0 B125
• B6.7S

C Series

• C GAS PLUS CM556

C8.3 Series

• C8.3 G

D4.0 Series

• D4.0 CM2620 D103B

F2.8 Series

• F2.8 CM2620 F135B

F3.8 Series

• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102

F4.5 Series

• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

G8.3 Series

• G8.3

ISB Series

• ISB (Chrysler)
• ISB CM2150
• ISB CM550

The Hexagon Flange Head Cap Screw part 3902023 is versatile and compatible across a wide range of Cummins engines, ensuring that it can be used in various applications within these engine series.

Role of Part 3902023 Hexagon Flange Head Cap Screw in Engine Systems

The part 3902023 Hexagon Flange Head Cap Screw is instrumental in securing and maintaining the integrity of various engine components. Its robust design ensures reliable fastening in high-stress environments, contributing to the overall efficiency and durability of the engine system.

Air Control Valve

In the air control valve system, the 3902023 screw is used to secure the valve housing to the engine block. This ensures precise air flow regulation, which is essential for optimal combustion and engine performance.

Air Heater Starting Aid

For the air heater starting aid, the screw plays a role in attaching the heater unit to the engine. This connection is vital for effective cold-start performance, ensuring the engine reaches operating temperature quickly.

Alternator Location

At the alternator location, the screw is employed to mount the alternator to the engine. This secure attachment is necessary for consistent power generation and to prevent vibrations that could lead to electrical issues.

Camshaft Drive

In the camshaft drive system, the screw is utilized to fasten the camshaft housing, ensuring smooth and reliable operation of the camshaft. This is important for maintaining proper valve timing and engine efficiency.

Charge Air Bypass Plumbing

For the charge air bypass plumbing, the screw secures the bypass valve and associated components. This ensures that the bypass system functions correctly, allowing for efficient air flow management and improved engine performance.

Crankcase Breather Arrangement

In the crankcase breather arrangement, the screw is used to attach the breather housing. This connection is essential for maintaining proper ventilation within the crankcase, preventing the buildup of harmful gases and contaminants.

Cylinder Block Cover

The screw is integral in securing the cylinder block cover, providing a tight seal that prevents oil leaks and ensures the integrity of the engine’s internal components.

Flywheel Housing

At the flywheel housing, the screw is employed to fasten the housing to the engine block. This secure attachment is crucial for maintaining the alignment and balance of the flywheel, which is essential for smooth engine operation.

Front Engine Guard

In the front engine guard, the screw is used to mount the guard to the engine frame. This protects the engine from debris and impacts, ensuring longevity and safety.

Front Gear Housing

For the front gear housing, the screw secures the housing to the engine, ensuring that the gears operate within their designed parameters, which is vital for transmission efficiency.

Fuel Filter Location

At the fuel filter location, the screw is utilized to attach the fuel filter housing. This ensures that the fuel filter remains securely in place, allowing for effective filtration and preventing fuel system contamination.

Fuel Plumbing

In the fuel plumbing system, the screw is used to secure fuel lines and fittings. This ensures a leak-free connection, which is essential for safe and efficient fuel delivery to the engine.

Fuel Shutoff Valve

For the fuel shutoff valve, the screw is employed to mount the valve to the engine. This secure attachment ensures that the valve operates correctly, allowing for safe and controlled fuel shutoff when needed.

Fuel System Accessories

In fuel system accessories, the screw is used to attach various components such as sensors and regulators. This ensures that these accessories function correctly, contributing to overall fuel system performance.

Fuel Transfer Connection

At the fuel transfer connection, the screw secures the transfer lines and fittings. This ensures a reliable connection, which is important for efficient fuel transfer between tanks or systems.

Idler Gear

For the idler gear, the screw is utilized to mount the gear to the engine. This secure attachment ensures that the idler gear operates smoothly, maintaining proper tension in the timing belt or chain.

Noise Reduction Device

In noise reduction devices, the screw is used to attach the device to the engine. This ensures that the device effectively reduces engine noise, contributing to a quieter operating environment.

Performance Parts

For performance parts, the screw is employed to secure various high-performance components. This ensures that these parts remain firmly in place, allowing them to function optimally and enhance engine performance.

Thermostat Housing Assembly

In the thermostat housing assembly, the screw is used to attach the housing to the engine. This secure connection is essential for maintaining proper coolant flow and temperature regulation.

Valve Cover

For the valve cover, the screw is utilized to secure the cover to the cylinder head. This ensures a tight seal, preventing oil leaks and maintaining the integrity of the valve train.

Valve Cover Arrangement

In the valve cover arrangement, the screw is used to attach various components within the valve cover. This ensures that these components remain securely in place, allowing for efficient valve operation and engine performance.

Conclusion

The 3902023 Hexagon Flange Head Cap Screw by Cummins is a critical component in the maintenance and operation of commercial trucks and various Cummins engines. Its robust design, key features, and compatibility across multiple engine series make it a versatile and reliable fastening solution. Regular maintenance and proper installation practices are essential to ensure the longevity and performance of this Cummins part.