3900636
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3900636, is a component manufactured by Cummins. This screw is significant in the realm of commercial truck maintenance due to its robust design and reliable performance. Cummins, a well-established name in the industry, ensures that this part meets high standards of quality and functionality, making it a preferred choice for truck mechanics and fleet managers.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and a flange that sits against the surface being fastened. This design allows for secure and efficient tightening using a wrench or socket, minimizing the risk of cam-out. Within mechanical systems, these screws play a role in joining components securely, ensuring structural integrity and reliable operation ¹.

Purpose and Role in Truck Operation

The 3900636 Hexagon Flange Head Cap Screw is utilized in various applications within commercial trucks. It is commonly employed in areas where high tensile strength and resistance to vibration are required, such as in the engine compartment, chassis, and other critical assemblies. By providing a secure fastening solution, this screw helps maintain the structural integrity of the truck, contributing to safe and efficient operation ².

Key Features

The 3900636 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance and durability. Its hexagonal flange head design allows for easy and precise tightening, reducing the likelihood of stripping or rounding off. The screw is typically made from high-strength materials, such as alloy steel, which provides excellent resistance to corrosion and wear. Additionally, the flange design distributes the load more evenly across the surface, reducing the risk of damage to the fastened material ³.

Benefits

Using the 3900636 Hexagon Flange Head Cap Screw in truck maintenance offers several benefits. The secure fastening provided by the hexagonal head and flange design ensures that components remain firmly in place, even under significant stress or vibration. This screw’s resistance to corrosion and wear contributes to its longevity, reducing the need for frequent replacements. Furthermore, the ease of installation and removal simplifies maintenance procedures, saving time and labor costs.

Installation and Usage Guidelines

Proper installation of the 3900636 Hexagon Flange Head Cap Screw is vital for ensuring optimal performance. Begin by selecting the appropriate size and grade of screw for the application. Use a wrench or socket to tighten the screw to the specified torque, which can be found in the manufacturer’s guidelines. It is important to avoid over-tightening, as this can lead to damage or stripping. Regularly inspect the screw for signs of wear or corrosion, and replace it if necessary to maintain reliable performance.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws include loosening due to vibration, corrosion, and wear. To address these problems, regularly inspect screws for signs of damage or corrosion. If a screw appears loose, re-tighten it to the specified torque. In cases of significant corrosion or wear, replace the screw to prevent failure. Proper maintenance, including regular inspections and timely replacements, will help prolong the lifespan of the screw and ensure continued reliable performance.

Safety Considerations

When working with Hexagon Flange Head Cap Screws, it is important to follow safety practices to prevent accidents and ensure user safety. Always wear appropriate personal protective equipment, such as gloves and safety glasses, when handling and installing screws. Store screws in a dry, organized environment to prevent corrosion and damage. Follow the manufacturer’s torque specifications to avoid over-tightening, which can lead to stripped screws or damaged components.

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 is committed to quality, innovation, and customer satisfaction. The company’s extensive product range includes engines, powertrains, and related components for commercial trucks, buses, construction equipment, and more. Cummins’ dedication to excellence ensures that their products, including the 3900636 Hexagon Flange Head Cap Screw, meet the highest standards of performance and reliability ⁴.

Hexagon Flange Head Cap Screw 3900636 in Cummins Engines

The Cummins part number 3900636, a Hexagon Flange Head Cap Screw, is a critical component in several Cummins engine models. This screw is integral to the assembly and maintenance of these engines, ensuring secure fastening and stability.

4B3.9 and 6B5.9 Engines

The 4B3.9 and 6B5.9 engines, both part of the B Series, utilize the 3900636 screw in various applications. This screw is essential for maintaining the integrity of the engine’s structure, particularly in areas where secure fastening is critical for operational safety and efficiency.

6C8.3 and C8.3 G Engines

The 6C8.3 and C8.3 G engines, which are part of the C Series, also incorporate the 3900636 screw. This component is used in several key areas, ensuring that parts of the engine remain tightly fastened, which is crucial for the engine’s performance and longevity.

B4.5, B5.9 G, and B5.9 GAS PLUS CM556 Engines

In the B Series engines, including the B4.5, B5.9 G, and B5.9 GAS PLUS CM556, the 3900636 screw is used in various applications. These engines rely on this screw to secure different components, ensuring that the engine operates smoothly and efficiently.

ISB CM550, ISB/ISD4.5 CM2150 B119, and QSB3.9 30 CM550 Engines

The ISB CM550, ISB/ISD4.5 CM2150 B119, and QSB3.9 30 CM550 engines, which are part of the ISB and QSB Series, also use the 3900636 screw. This screw is vital for maintaining the structural integrity of these engines, ensuring that all components are securely fastened.

ISBE CM800, ISBE4 CM850, and QSM11 CM570 Engines

The ISBE CM800, ISBE4 CM850, and QSM11 CM570 engines, which are part of the ISBE and QSM Series, incorporate the 3900636 screw in several applications. This screw is essential for securing various parts of the engine, contributing to the overall reliability and performance of these models.

ISM CM570, L10 CELECT, L10 GAS, and L10 MECHANICAL Engines

The ISM CM570, L10 CELECT, L10 GAS, and L10 MECHANICAL engines, which are part of the L10 and ISM Series, also use the 3900636 screw. This screw is crucial for maintaining the structural integrity of these engines, ensuring that all components are securely fastened.

M11 CELECT and M11 CELECT PLUS Engines

The M11 CELECT and M11 CELECT PLUS engines, which are part of the M11 Series, incorporate the 3900636 screw in several key areas. This screw is essential for securing various parts of the engine, contributing to the overall reliability and performance of these models.

QSB5.9 44 CM550 Engine

The QSB5.9 44 CM550 engine, part of the QSB Series, also utilizes the 3900636 screw. This screw is crucial for maintaining the structural integrity of the engine, ensuring that all components are securely fastened.

Role of Part 3900636 Hexagon Flange Head Cap Screw in Various Engine Components

The part 3900636 Hexagon Flange Head Cap Screw is instrumental in securing and maintaining the integrity of several key components within engine systems. Its robust design and reliable fastening capability make it an essential element in the following applications:

Air Cleaner

In the air cleaner assembly, the Hexagon Flange Head Cap Screw ensures that the housing is securely fastened, preventing any potential air leaks that could affect engine performance.

Alternator Mounting

For alternator mounting, this screw plays a significant role in securing the alternator to the engine block or bracket. This ensures stable operation and efficient power generation.

Electronic Engine Control System

Within the electronic engine control system, the screw is used to mount sensors and control modules, ensuring they remain in place and function correctly under varying engine conditions.

Engine Control Module (ECM)

The ECM housing often requires secure fastening to protect sensitive electronic components. The Hexagon Flange Head Cap Screw provides the necessary stability and protection.

Engine Installation Kit

During engine installation, this screw is frequently used to fasten various components to the engine block, ensuring a secure and vibration-resistant setup.

Fan Pilot Spacer

In applications involving fan pilot spacers, the screw helps maintain the correct spacing and alignment between the fan and the engine, crucial for optimal cooling performance.

Freon Compressor and Refrigerant Compressor

Both freon and refrigerant compressors require secure mounting to the engine or frame. The Hexagon Flange Head Cap Screw ensures these compressors are firmly in place, allowing for efficient refrigerant circulation.

Guard Package

For guard packages, which protect various engine components, the screw is used to attach guards securely, ensuring they remain in position during operation.

Heat Exchanger

In heat exchanger assemblies, the screw is employed to fasten components together, ensuring efficient heat transfer and maintaining the structural integrity of the exchanger.

Refrigerant Compressor Mounting

Similar to other compressor applications, this screw is vital in securing the refrigerant compressor to its mounting bracket, ensuring stable and efficient operation.

Turbocharger Arrangement and Location

In turbocharger setups, the screw is used to secure turbocharger components to the engine, ensuring they remain in the correct position for optimal performance and efficiency.

Water Inlet Connection

For water inlet connections, the screw ensures that the connection is secure, preventing leaks and ensuring consistent coolant flow to the engine.

Overall, the part 3900636 Hexagon Flange Head Cap Screw is a versatile and reliable fastening solution across a wide range of engine components, contributing to the overall performance and durability of the engine system.

Conclusion

The 3900636 Hexagon Flange Head Cap Screw is a vital component in the maintenance and operation of commercial trucks and Cummins engines. Its robust design, reliable performance, and versatile applications make it an essential part for ensuring the structural integrity and efficient operation of various engine components. Proper installation, regular maintenance, and adherence to safety practices are crucial for maximizing the lifespan and effectiveness of this screw.