3919448
Socket Head Cap Screw
Cummins®

The 3919448 Socket Head Cap Screw is a specialized fastener produced by Cummins, a well-established manufacturer in the commercial truck industry. This screw is designed for use in various applications within commercial trucks, contributing to the secure assembly of components and the overall reliability of the vehicle.

Basic Concepts of Socket Head Cap Screws

A Socket Head Cap Screw is a type of fastener characterized by a hexagonal socket in the head, allowing for installation and removal using a hex key. These screws are commonly used in mechanical applications due to their strength, precision, and ease of use. They function by providing a secure fastening solution that can withstand significant tensile and shear forces, making them suitable for a wide range of assemblies ¹.

Purpose of the 3919448 Socket Head Cap Screw in Trucks

The 3919448 Socket Head Cap Screw plays a role in the operation and maintenance of commercial trucks by securing various components. Its applications include fastening engine parts, transmission components, and chassis assemblies. The screw ensures that these critical parts remain securely in place, contributing to the truck’s performance and durability ².

Key Features

The 3919448 Socket Head Cap Screw is crafted from high-quality materials, typically alloy steel, which provides excellent strength and durability. It features a fine or coarse thread, depending on the specific application requirements, and a countersunk head that allows for flush installation with the surface. The hexagonal socket design facilitates easy installation and removal using a hex key, enhancing efficiency during maintenance procedures ³.

Benefits

Using the 3919448 Socket Head Cap Screw offers several advantages. Its robust material composition and precise thread design contribute to improved fastening strength, reducing the risk of loosening over time. The ease of installation and removal using a hex key simplifies maintenance tasks, allowing for quick and efficient component replacement or adjustment.

Installation Considerations

Proper installation of the 3919448 Socket Head Cap Screw is crucial for ensuring secure and reliable fastening. It is recommended to follow torque specifications provided by the manufacturer to achieve the correct clamping force without overtightening, which could damage the screw or the surrounding components. Using the appropriate hex key and ensuring the installation surface is clean and free of debris are also important practices for successful installation.

Troubleshooting and Maintenance

Common issues with Socket Head Cap Screws include corrosion, stripping, and loosening. Regular inspection and maintenance can help identify and address these problems early. Cleaning the screw and surrounding area, applying an appropriate lubricant or anti-seize compound, and monitoring torque values during reinstallation can prolong the lifespan of the fastener and maintain its performance.

Cummins: Manufacturer Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a strong reputation in the commercial truck industry, Cummins is known for its commitment to quality, innovation, and customer satisfaction. The company’s extensive product range and focus on reliability make it a preferred choice for commercial vehicle manufacturers and operators.

Socket Head Cap Screw 3919448 Compatibility with Cummins Engines

The Socket Head Cap Screw part number 3919448, manufactured by Cummins, is a versatile component that fits a variety of Cummins engines. This screw is designed to provide a secure fastening solution in various engine applications, ensuring that components remain tightly secured under operational conditions.

Compatibility with Specific Engine Models

• 4B3.9
• 6B5.9
• 6C8.3
• B5.9 GAS PLUS CM556
• B6.7S
• ISB/ISD6.7 CM2150 SN
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B140
• ISB5.9G CM2180
• ISBE CM2150
• ISBE4 CM850
• QSB5.9G
• X12 CM2350 X119B

Grouping of Compatible Engines

The Socket Head Cap Screw 3919448 is compatible with a range of Cummins engines, including both diesel and gas models. Here is a grouping of engines based on their specifications and applications:

• Diesel Engines:

  • 4B3.9
  • 6B5.9
  • 6C8.3
  • B6.7S
  • ISB/ISD6.7 CM2150 SN
  • ISB5.9 CM2880 B110
  • ISB5.9 CM2880 B140
  • ISB5.9G CM2180
  • ISBE CM2150
  • ISBE4 CM850
  • QSB5.9G

• Gas Engines:

  • B5.9 GAS PLUS CM556

• Specialized Models:

  • X12 CM2350 X119B

This comprehensive compatibility ensures that the Socket Head Cap Screw 3919448 can be used across a wide range of Cummins engines, providing a reliable fastening solution for various applications.

Role of Part 3919448 Socket Head Cap Screw in Engine Systems

The part 3919448 Socket Head Cap Screw is integral to the assembly and maintenance of various engine components. Its primary function is to secure and fasten parts together, ensuring stability and proper operation of the engine system.

Breather and Crankcase

In the breather and crankcase assembly, the Socket Head Cap Screw is used to secure the breather housing to the crankcase. This connection is essential for maintaining the integrity of the ventilation system, which helps in expelling contaminants and moisture from the crankcase, thus prolonging engine life.

Camshaft and Camshaft Gear Remover

When working with the camshaft, the Socket Head Cap Screw is often employed to fasten the camshaft gear remover tool. This tool is used to detach the camshaft gear from the camshaft, a necessary step during engine maintenance or repair. The secure fastening provided by the screw ensures that the tool operates effectively without slippage.

Connecting Rod Guide Pin Kit and Flywheel

In the connecting rod guide pin kit, the Socket Head Cap Screw is utilized to secure the guide pins in place. This is vital for the precise alignment of the connecting rod with the crankshaft, which is fundamental for the engine’s smooth operation. Similarly, in the flywheel assembly, these screws are used to attach the flywheel to the crankshaft, ensuring that the flywheel rotates in perfect harmony with the engine’s power stroke.

Guide Pin Adapter and Housing

The guide pin adapter, which is often part of the engine’s timing system, relies on Socket Head Cap Screws to maintain its position relative to the engine block. This ensures accurate timing, which is essential for the engine’s performance. In the housing components, these screws are used to secure various covers and plates, protecting internal engine parts from external contaminants and damage.

Front Gear and Mounting Plate

For the front gear, Socket Head Cap Screws are used to attach the gear to the engine’s front cover. This secure attachment is necessary for the gear to transmit power efficiently from the crankshaft to other engine components. On the mounting plate, these screws are essential for attaching the plate to the engine block, providing a stable base for other components to be mounted.

Resistor and Corrosion

In electrical components like resistors, Socket Head Cap Screws are used to secure the resistor in place within the engine’s electrical system. This ensures consistent electrical performance. In areas prone to corrosion, these screws are often coated or made from corrosion-resistant materials to maintain their integrity and the engine’s electrical system’s reliability.

Tool Certification Kit and Valve

In tool certification kits, Socket Head Cap Screws are used to secure various tools and gauges, ensuring they are correctly positioned for accurate measurements and adjustments. For valve assemblies, these screws are crucial for securing valve covers and components, ensuring the valves operate within specified tolerances for optimal engine performance.

Fuel Shutoff

Finally, in the fuel shutoff system, Socket Head Cap Screws are used to secure the shutoff mechanism. This is important for safety, as it ensures that the fuel supply can be reliably cut off in emergency situations or during maintenance, preventing fuel leaks and potential hazards.

Conclusion

The 3919448 Socket Head Cap Screw is a critical component in the assembly and maintenance of Cummins engines, ensuring the secure fastening of various engine components. Its compatibility with a wide range of Cummins engine models and its role in maintaining engine performance and reliability make it an essential part for commercial truck operators and maintenance professionals.