3920115
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3920115, is a component manufactured by Cummins, a well-established name in the heavy-duty truck industry. This screw is integral to various applications within heavy-duty trucks, ensuring secure fastening and reliable performance under demanding conditions.

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 torque application using standard tools, while the flange provides additional surface area for distribution of clamping force. Within a truck’s mechanical system, this screw plays a role in securing components, ensuring they remain firmly in place despite vibrations and varying loads ¹.

Purpose and Role

The 3920115 Hexagon Flange Head Cap Screw serves multiple functions in truck operations. It is commonly used to fasten engine components, chassis parts, and other critical assemblies. Its design ensures that connected parts remain securely attached, which is vital for the overall integrity and performance of the truck. Specific roles include securing engine mounts, attaching brackets, and fastening various structural elements.

Key Features

The 3920115 Hexagon Flange Head Cap Screw boasts several key features that enhance its functionality. Its hexagonal head design allows for straightforward installation and removal using common tools. The flange at the base of the screw provides additional contact area, which helps in distributing the clamping force more evenly. Additionally, the screw is typically made from high-strength materials, ensuring it can withstand significant stress and corrosion ².

Benefits

The benefits of using the 3920115 Hexagon Flange Head Cap Screw include enhanced durability, improved fastening capabilities, and resistance to loosening. The screw’s robust construction allows it to maintain its integrity under high stress, while the flange design reduces the likelihood of the screw working loose over time. This results in more reliable fastening solutions for critical truck components.

Installation and Usage

Proper installation of the 3920115 Hexagon Flange Head Cap Screw is crucial for its effective performance. It should be installed using the appropriate torque specifications to ensure the correct clamping force is achieved without over-tightening, which could damage the screw or the components being fastened. Best practices include using a torque wrench for accurate application and periodically checking the tightness of the screw to ensure it remains secure.

Troubleshooting and Maintenance

Common issues with the 3920115 Hexagon Flange Head Cap Screw may include loosening over time or corrosion in harsh environments. Regular inspection and maintenance can help identify these issues early. If corrosion is detected, the screw should be replaced to prevent failure. Additionally, ensuring that all screws are properly torqued during routine maintenance can help maintain their effectiveness ³.

Cummins Overview

Cummins is a renowned manufacturer with a long-standing reputation in the heavy-duty truck industry. The company is known for its commitment to quality and innovation, providing reliable components that meet the demanding requirements of heavy-duty applications. Cummins’ history of excellence and dedication to advancing technology ensures that their products, like the 3920115 Hexagon Flange Head Cap Screw, are trusted by professionals in the field.

Hexagon Flange Head Cap Screw 3920115 in Cummins Engines

The Hexagon Flange Head Cap Screw 3920115, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is integral to the assembly and maintenance of these engines, ensuring secure fastening and structural integrity. Below is a detailed look at how this part fits into different Cummins engine families.

ISB Series Engines

The ISB series engines, including the ISB CM2150, ISB CM550, ISB6.7 CM2250, and ISB6.7 CM2350 B101, utilize the 3920115 screw in several applications. These engines are known for their robust performance and reliability, often found in heavy-duty trucks and industrial applications. The screw is typically used in securing various engine components, ensuring that parts remain tightly fastened under high operational stresses.

QSK Series Engines

The QSK series engines, such as the QSK45 CM500, QSK60 CM500, QSK60 CM850 MCRS, QSK78 CM500, and QSK95 CM2350 K111/K113, also incorporate the 3920115 screw. These engines are designed for high-power output and are commonly used in marine and power generation applications. The screw’s role in these engines is crucial for maintaining the structural integrity of the engine’s components, especially in environments where vibrations and operational stresses are significant.

QSB and ISM Series Engines

The QSB6.7 CM2250 and ISM CM570 engines, along with the ISM11 CM876 SN, use the 3920115 screw in their assembly. These engines are typically found in agricultural and construction equipment, where durability and reliability are paramount. The screw helps in securing various engine parts, ensuring that the engine operates smoothly and efficiently under demanding conditions.

Other Cummins Engines

Engines like the ISF2.8 CM2220 F129, ISBE CM800, ISG12 G CMOH6.0 G111, and QSV91-G4 CM558/CM700 V102 also incorporate the 3920115 screw. These engines are used in a variety of applications, from military vehicles to specialized industrial machinery. The screw’s role in these engines is to provide a reliable fastening solution, ensuring that all components are securely held together, which is essential for the engine’s performance and longevity.

Role of Part 3920115 Hexagon Flange Head Cap Screw in Engine Systems

The Part 3920115 Hexagon Flange Head Cap Screw is integral to the assembly and functionality of various engine components. Its design allows for secure fastening in high-stress environments, ensuring the integrity and performance of the engine system.

Air Cleaner and Mounting

In the air cleaner system, this screw is used to secure the air cleaner to its mounting bracket. This ensures that the air cleaner remains firmly in place, allowing for efficient filtration of incoming air and maintaining optimal engine performance.

Crankcase Breather and Charge Air Bypass Plumbing

The screw plays a role in the crankcase breather system by securing components that allow for the release of pressure from the crankcase. In charge air bypass plumbing, it ensures that connections remain tight, preventing leaks and maintaining the efficiency of the air bypass system.

Fuel System Components

Within the fuel system, the Hexagon Flange Head Cap Screw is utilized in the fuel filter, fuel plumbing, and fuel pressure regulator. It secures these components, ensuring there are no leaks in the fuel lines and that the fuel pressure regulator functions correctly, providing consistent fuel pressure to the engine.

Engine Instrumentation and Plumbing

For engine instrumentation, such as the engine instrument panel bracket and fuel control module, this screw ensures that these components are securely mounted. In fuel and charge air bypass plumbing, it maintains the integrity of connections, preventing leaks and ensuring efficient operation of the engine.

Valve Covers and Oil Pan

The screw is also employed in securing valve covers and the oil pan. This is essential for maintaining the seal around these components, preventing oil leaks, and ensuring that the engine’s lubrication system operates effectively.

Heat Shields and Service Kits

In heat shields, the Hexagon Flange Head Cap Screw secures the shield in place, protecting nearby components from excessive heat. In service kits, it is often included to replace worn or damaged screws, ensuring that all components remain securely fastened during engine maintenance or repair.

Fuel Shutoff Valve and Lubricating System

Finally, in the fuel shutoff valve and engine lubricating system, this screw ensures that these critical components are securely mounted and operate efficiently, contributing to the overall reliability and performance of the engine.

Conclusion

The 3920115 Hexagon Flange Head Cap Screw is a versatile and essential component across a wide range of Cummins engines. Its use in securing various engine parts ensures that these engines operate reliably and efficiently in their respective applications.