3901727
Hexagon Flange Head Cap Screw
Cummins®

Introduction

The Hexagon Flange Head Cap Screw, identified by part number 3901727, is a component manufactured by Cummins, a well-regarded name in the commercial truck industry. This screw is integral to the assembly and maintenance of various truck components, ensuring secure fastening and reliable performance.

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 to distribute load and prevent the screw from sinking into softer materials. In a truck’s mechanical system, these screws are used to join components securely, ensuring structural integrity and operational reliability.

Purpose and Role in Truck Operation

This Cummins part plays a significant role in the operation of commercial trucks. It is employed in various applications, including securing engine components, transmission parts, and chassis assemblies. Its design ensures that critical components remain firmly attached, contributing to the overall safety and performance of the vehicle. The screw’s flange also helps in maintaining alignment and providing a stable connection, which is vital in high-stress environments typical of commercial trucking.

Key Features

The 3901727 Hexagon Flange Head Cap Screw boasts several key features that enhance its functionality and durability. Its hexagonal head design allows for precise and consistent torque application, reducing the risk of over-tightening or stripping. The flange at the base of the screw provides additional contact area, which helps in distributing the load more evenly and preventing the screw from pulling through the material. Additionally, the screw is made from high-quality materials that offer excellent resistance to corrosion and wear, ensuring long-term reliability in demanding conditions.

Benefits

This part offers several benefits that make it a preferred choice for commercial truck applications. Its design enhances fastening security, providing a robust connection that can withstand significant vibrational forces common in truck operations. The ease of installation and removal is another notable advantage, allowing for quick maintenance and repairs. Furthermore, the screw’s resistance to corrosion ensures that it maintains its integrity over time, even in harsh environmental conditions.

Installation and Usage

Proper installation of the 3901727 Hexagon Flange Head Cap Screw is crucial for ensuring optimal performance and longevity. It is recommended to use the appropriate torque settings specified by the manufacturer to avoid over-tightening, which can lead to damage, or under-tightening, which can compromise the connection. Utilizing the correct tools, such as a hexagonal socket wrench, ensures that the screw is installed with the precise amount of torque required. Additionally, ensuring that the mating surfaces are clean and free of debris will help in achieving a secure and lasting connection.

Troubleshooting and Maintenance

Common issues with this part may include loosening due to vibration or corrosion. Regular inspections should be conducted to check for any signs of wear or damage. If loosening is detected, the screw should be re-tightened to the manufacturer’s specified torque settings. In cases of corrosion, it may be necessary to replace the screw to ensure continued reliability. Proper maintenance practices, such as keeping the screw and surrounding areas clean and free of contaminants, will help in prolonging its service life.

Cummins Overview

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 innovation in the commercial truck industry. The company’s commitment to excellence is evident in its comprehensive product range, which includes a variety of components designed to enhance the performance and reliability of commercial vehicles. Cummins’ dedication to customer satisfaction and continuous improvement underscores its position as a trusted provider in the industry.

Hexagon Flange Head Cap Screw Part 3901727 in Cummins Engines

The Hexagon Flange Head Cap Screw part number 3901727, manufactured by Cummins, is a critical component in various Cummins engine models. This part is designed to secure and stabilize different parts within the engine assembly, ensuring optimal performance and longevity. Below is a detailed breakdown of how this part integrates with specific Cummins engines:

4B3.9, 6B5.9, 6C8.3, B4.5, B4.5 CM2350 B129B, B5.9 G, B5.9 GAS PLUS CM556, B6.7 CM2350 B135B

In these engines, the Hexagon Flange Head Cap Screw is used to fasten various engine components, including cylinder heads, valve covers, and other critical assemblies. Its design ensures a tight and secure fit, preventing any loosening under operational stress.

F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F4.5 CM2620 F139B

For the F3.8 and F4.5 series engines, the part 3901727 is integral in securing the cylinder heads and other engine covers. The flange head design provides a larger bearing surface, distributing the load more evenly and reducing the risk of damage to the mating parts.

ISB (Chrysler), ISB CM2150, ISB CM550, ISB CM850, ISB/ISD4.5 CM2150 B119, ISB/ISD6.7 CM2150 SN, ISB4.5 CM2350 B104, ISB6.7 CM2250, ISB6.7 CM2350 B101

In the ISB series engines, the Hexagon Flange Head Cap Screw is used extensively across different variants. It plays a crucial role in securing the cylinder heads, valve covers, and other engine components. The screw’s design ensures that these parts remain tightly fastened, even under high operational stresses.

ISBE CM2150, ISBE CM800, ISBE4 CM850

For the ISBE series engines, the part 3901727 is used to fasten various engine components, including the cylinder heads and other critical assemblies. The flange head design provides a larger bearing surface, ensuring that the screws remain securely fastened.

ISF3.8 CM2220 AN

In the ISF3.8 CM2220 AN engine, the Hexagon Flange Head Cap Screw is used to secure the cylinder heads and other engine covers. Its design ensures a tight and secure fit, preventing any loosening under operational stress.

Overall, the Hexagon Flange Head Cap Screw part number 3901727 is a versatile and essential component in Cummins engines, ensuring that various parts remain securely fastened and operational integrity is maintained.

Role of Part 3901727 Hexagon Flange Head Cap Screw in Engine Systems

Flexplate and Flywheel

This part is instrumental in securing the flexplate to the crankshaft in automatic transmission systems. This screw ensures a robust connection, allowing efficient transfer of power from the engine to the transmission. Similarly, in manual transmission systems, this screw plays a significant role in attaching the flywheel to the crankshaft. The secure attachment is vital for smooth operation and consistent power delivery during gear changes.

Pump

In engine systems, various pumps such as fuel, oil, and water pumps are essential for the proper functioning of the engine. The part 3901727 Hexagon Flange Head Cap Screw is often used to fasten pump housings or covers. This ensures that the pump components remain tightly sealed, preventing leaks and maintaining the integrity of the pump’s operation. The screw’s design allows for easy installation and removal, facilitating maintenance and repair processes.

Vacuum

Vacuum systems in engines are responsible for operating various components such as brake boosters, emissions control devices, and actuators. The part 3901727 Hexagon Flange Head Cap Screw is utilized in securing vacuum pump housings and manifold connections. This ensures a tight seal, which is essential for maintaining the vacuum pressure required for the efficient operation of these systems. The screw’s flange head provides additional surface area for a secure fit, reducing the risk of vacuum leaks.

Conclusion

The 3901727 Hexagon Flange Head Cap Screw is a critical component in the maintenance and operation of Cummins engines and commercial trucks. Its design and features ensure secure fastening, resistance to corrosion, and ease of installation and removal. Proper use and maintenance of this part are essential for the reliable performance and longevity of the vehicle.