3913638
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw (Part #3913638) is a specialized fastener produced by Cummins, designed for use in commercial trucks. This article provides an overview of the Hexagon Flange Head Cap Screw, its purpose, key features, benefits, and maintenance suggestions.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of bolt characterized by a hexagonal head and a flanged base. The hexagonal head allows for easy tightening and loosening using a wrench or socket, while the flange provides additional surface area to distribute load and prevent the screw from sinking into the material.

Purpose and Function

The 3913638 Hexagon Flange Head Cap Screw plays a role in securing various components within a truck’s engine and chassis. It is commonly used in applications where a combination of high tensile strength and resistance to loosening is required.

Key Features

• Hexagonal head for easy tool engagement.
• Flanged base to distribute load and provide additional stability.
• Manufactured from high-tensile steel to ensure durability and strength.
• Zinc-plated or coated to enhance corrosion resistance.

Benefits

• Provides secure fastening in high-stress applications.
• Resistant to loosening due to vibrations commonly experienced in truck operations.
• Enhanced durability and longevity due to high-tensile steel construction.
• Improved corrosion resistance, extending the service life in various environmental conditions.

Troubleshooting and Maintenance

Regular inspection of Hexagon Flange Head Cap Screws is recommended to ensure they remain tight and free from corrosion. If corrosion is detected, the affected screws should be replaced to maintain structural integrity. Additionally, using the correct torque specifications during installation helps prevent over-tightening or under-tightening, which can lead to screw failure.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Known for its commitment to quality and innovation, Cummins provides a wide range of components and solutions for the automotive, industrial, and commercial vehicle markets.

Compatibility of 3913638 with Cummins Engines

The Cummins part number 3913638, a Hexagon Flange Head Cap Screw, is designed to fit a variety of Cummins engines. This screw is engineered to provide a secure fastening solution for various components within these engines. Below is a detailed breakdown of the engines with which this part is compatible:

15N CM2380 M104B

The 15N CM2380 M104B engine benefits from the 3913638 screw in securing certain critical components, ensuring structural integrity and operational efficiency.

4B3.9, 6B5.9, 6C8.3, B3.3, B3.9 G, B4.5, B4.5 CM2350 B129B

These engines utilize the 3913638 screw for fastening various parts, including but not limited to, cylinder heads, valve covers, and other structural components. The screw’s design ensures a tight and reliable connection, which is crucial for the engine’s performance.

B5.6 CM2670 B152B, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556

The 3913638 screw is also compatible with these engines, providing a robust fastening solution for components such as intake manifolds, exhaust systems, and other critical parts. Its use in these engines helps maintain the structural integrity and operational efficiency of the engine.

B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C, B6.7 G CMOH6.0 B125

This screw is essential for securing various components in these engines, including but not limited to, fuel injectors, turbo systems, and other critical parts. Its design ensures a secure and reliable connection, contributing to the overall performance and longevity of the engine.

C GAS PLUS CM556, C8.3 G

The 3913638 screw is also compatible with these engines, providing a robust fastening solution for components such as air intake systems, exhaust manifolds, and other critical parts. Its use in these engines helps maintain the structural integrity and operational efficiency of the engine.

D4.0 CM2620 D103B, F2.8 CM2620 F135B, F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F3.8 F102, F4.5 CM2620 F139B

These engines also benefit from the 3913638 screw for fastening various components, including but not limited to, cylinder heads, valve covers, and other structural components. The screw’s design ensures a tight and reliable connection, which is crucial for the engine’s performance.

Role of Part 3913638 Hexagon Flange Head Cap Screw in Engine Systems

The part 3913638 Hexagon Flange Head Cap Screw is instrumental in securing and maintaining the integrity of various engine components. Its robust design ensures reliable fastening across multiple systems, contributing to the overall efficiency and durability of the engine.

Accessories and Accessory Support

In the assembly of accessories and their support structures, the Hexagon Flange Head Cap Screw provides the necessary tension to keep components firmly in place. This is particularly important for items like the electric starting system, where secure mounting is essential for consistent performance.

Air Systems

For the air heater starting aid and air inlet pipe, the screw ensures that these components are tightly fastened to the engine block or manifold. This prevents air leaks and ensures that the air intake system operates efficiently, contributing to better combustion and engine performance.

Fuel Systems

Within the fuel control module and fuel valve control module, the Hexagon Flange Head Cap Screw plays a key role in maintaining the precise alignment and sealing of fuel lines and connections. This is vital for the accurate delivery of fuel to the engine, directly impacting its performance and emissions.

Cooling and Lubrication

In the compressor coolant arrangement and plumbing, as well as the intercooler water plumbing, the screw secures fittings and connections, ensuring a leak-free system. This is crucial for maintaining optimal temperatures within the engine, enhancing both performance and longevity.

Exhaust and Intake Manifolds

The screw is used to fasten the exhaust manifold and air intake manifold to the cylinder head. This secure attachment is necessary to withstand the high temperatures and pressures generated during engine operation, ensuring a reliable seal and efficient airflow.

Turbocharger and Related Components

For the turbocharger kit and turbocharger oil drain connection, the Hexagon Flange Head Cap Screw ensures that all components are securely mounted. This is important for the turbocharger’s operation, as any looseness can lead to inefficiencies or even failure.

Housing and Structural Components

In various housings, such as the thermostat housing and flywheel housing, the screw provides the necessary clamping force to ensure these components remain intact under operational stress. This is essential for the structural integrity of the engine.

Additional Systems

The screw is also utilized in the alternator drive, lubricating oil gauge, and hardware certification kit to ensure all components are securely fastened. This contributes to the reliable operation of these systems, which are integral to the engine’s overall function.

Conclusion

Overall, the part 3913638 Hexagon Flange Head Cap Screw is a versatile fastener that plays a significant role in the secure assembly and reliable operation of various engine systems. Its robust design, high-tensile steel construction, and corrosion resistance make it an essential component in the maintenance and performance of Cummins engines.