3907998
Round Head Cap Screw
Cummins®

The 3907998 Round Head Cap Screw, manufactured by Cummins, is a component used in the maintenance and operation of commercial trucks. Cummins, a well-established name in the commercial truck industry, produces a range of parts designed to enhance the performance and reliability of truck systems. The 3907998 Round Head Cap Screw is one such part, playing a significant role in securing various components within commercial trucks ³.

Basic Concepts of Round Head Cap Screws

A Round Head Cap Screw is a type of fastener characterized by its rounded head and threaded body. It is commonly used in mechanical assemblies to secure components together. The rounded head design allows for easy installation using standard tools, while the threaded body provides a strong and secure connection. These screws are versatile and find applications in various industries, including automotive and heavy-duty truck manufacturing ¹.

Purpose of the 3907998 Round Head Cap Screw in Truck Operation

The 3907998 Round Head Cap Screw is utilized in the operation and maintenance of commercial trucks to secure components in various truck systems. Its applications range from fastening engine components to securing parts within the truck’s chassis. By providing a reliable connection, this screw helps maintain the integrity and functionality of critical truck systems ².

Key Features

The 3907998 Round Head Cap Screw is designed with several key features that enhance its performance and durability. It is made from high-quality materials, ensuring strength and resistance to wear. The screw features a specific thread type that allows for a secure fit, while its rounded head design facilitates easy installation and removal. Additionally, it may have special coatings or treatments to improve corrosion resistance and overall longevity ³.

Benefits

Using the 3907998 Round Head Cap Screw offers several benefits. It provides improved fastening security, ensuring that components remain securely in place under various operating conditions. Its resistance to corrosion enhances durability, particularly in harsh environments. Furthermore, the design of the screw allows for ease of installation and removal, making maintenance tasks more efficient ¹.

Installation Guidelines

Proper installation of the 3907998 Round Head Cap Screw is crucial for ensuring its effectiveness and longevity. It is recommended to follow specific torque specifications provided by the manufacturer to achieve the correct tension. Using the appropriate tools, such as a torque wrench, ensures that the screw is tightened to the recommended level without over-tightening, which could lead to damage ².

Troubleshooting and Maintenance

Common issues associated with Round Head Cap Screws include loosening, corrosion, or damage. Regular inspection and maintenance can help identify these issues early. If a screw shows signs of loosening, it should be re-tightened to the specified torque. Corrosion can be addressed by cleaning the affected area and applying a protective coating. Damaged screws should be replaced to maintain system integrity ³.

Compatibility and Applications

The 3907998 Round Head Cap Screw is compatible with various systems within commercial trucks. It is commonly used in engine components, chassis parts, and other critical areas where secure fastening is required. Its versatility makes it a valuable component in maintaining the reliability and performance of commercial trucks ¹.

Cummins: Manufacturer Overview

Cummins Inc. is a leading manufacturer in the commercial truck industry, known for its wide range of products and commitment to quality. With a history of innovation and excellence, Cummins has established a strong reputation for producing reliable and high-performance parts. The company’s product range includes engines, filtration systems, and aftermarket parts, all designed to meet the demanding requirements of commercial truck operations ².

Cummins Round Head Cap Screw 3907998 Compatibility

The Cummins Round Head Cap Screw part number 3907998 is a versatile component designed to fit a variety of Cummins engines. This screw is essential for securing various parts within the engine assembly, ensuring that components remain tightly fastened and properly aligned. Below is a detailed overview of the engines with which this screw is compatible.

4B3.9 and 6B5.9 Engines

The 4B3.9 and 6B5.9 engines, both part of the Cummins B Series, are medium-duty diesel engines known for their reliability and performance. The 3907998 screw is used in these engines to secure various components, including valve covers and other critical parts that require a secure fastening solution.

6C8.3 and C8.3 G Engines

The 6C8.3 and C8.3 G engines are part of the Cummins C Series, designed for heavy-duty applications. These engines benefit from the 3907998 screw in securing components such as the cylinder head and other parts that need robust fastening.

B3.9 G, B4.5, B4.5 RGT, B5.6 CM2670 B152B, B5.9, B5.9 G, B5.9 GAS PLUS CM556

These engines, part of the Cummins B Series, are used in a variety of applications, from agricultural to industrial. The 3907998 screw is used to secure parts such as the valve cover, timing cover, and other critical components in these engines.

C GAS PLUS CM556

The C GAS PLUS CM556 engine is a variant of the Cummins C Series, designed for specific applications requiring gas-powered engines. The 3907998 screw is used in this engine to secure components such as the cylinder head and other parts that require a reliable fastening solution.

G5.9, G5.9 CM558, G8.3, G8.3 CM558, GTA8.3 CM558

These engines, part of the Cummins G Series, are designed for heavy-duty applications. The 3907998 screw is used in these engines to secure components such as the cylinder head, valve cover, and other parts that require a robust fastening solution.

ISB CM550, ISB5.9 CM2880 B110, ISB5.9 CM2880 B140, ISB5.9 CM2880 B149

The ISB engines, part of the Cummins ISB Series, are designed for a wide range of applications, from agricultural to industrial. The 3907998 screw is used in these engines to secure components such as the cylinder head, valve cover, and other parts that require a reliable fastening solution.

ISC CM554, ISL CM554

The ISC and ISL engines, part of the Cummins C Series, are designed for heavy-duty applications. The 3907998 screw is used in these engines to secure components such as the cylinder head, valve cover, and other parts that require a robust fastening solution.

L8.9, L8.9 CM2670 L134C, L8.9 L121

The L8.9 engines, part of the Cummins L Series, are designed for heavy-duty applications. The 3907998 screw is used in these engines to secure components such as the cylinder head, valve cover, and other parts that require a reliable fastening solution.

Role of Part 3907998 Round Head Cap Screw in Engine Systems

The Part 3907998 Round Head Cap Screw is integral to the assembly and maintenance of various engine components. Its primary function is to secure and fasten different parts together, ensuring structural integrity and proper operation of the engine system.

Bosch Fuel Pump Kit

In the Bosch Fuel Pump Kit, the Round Head Cap Screw is used to secure the pump housing to the engine block. This ensures that the fuel pump remains firmly in place, allowing for consistent fuel delivery to the engine.

Cover and Gear Housings

For the Front Gear Cover and Rear Gear Housing, the screw plays a key role in attaching these covers to the respective gear assemblies. This secures the gears in place, preventing any misalignment that could lead to engine inefficiencies or damage.

Cylinder Block and Cylinder Head

When assembling the Cylinder Block and Cylinder Head, the Round Head Cap Screw is employed to fasten these critical components together. This ensures a tight seal, which is essential for maintaining compression and preventing leaks.

Harness and Wiring

In the Electronic Control Module Wiring and Harness, the screw is utilized to secure wiring looms and connectors. This not only organizes the wiring but also protects it from vibrations and potential damage.

Long Block and Short Block Assemblies

For both Long Block and Short Block assemblies, including the Short Block 6cart and Short Block Kit, the screw is vital in attaching various components such as the Front Gear Housing and Rear Gear Housing to the engine block. This ensures that all parts are correctly aligned and securely fastened.

Engine Control Module and Fuel Pump

In the Engine Control Module and Fuel Pump, the screw is used to secure these components to the engine frame. This ensures that they remain stable and operational under the dynamic conditions of engine operation.

Timing Pin Housing

The Timing Pin Housing relies on the Round Head Cap Screw to maintain its position relative to the engine’s timing mechanism. This is important for the precise operation of the engine’s timing system.

Repair Kit

In a Repair Kit, the screw is often included to replace damaged or worn-out fasteners. This ensures that any repaired component is securely reattached to the engine, maintaining its functionality and longevity.

The Part 3907998 Round Head Cap Screw, through its versatile application across these components, contributes significantly to the overall reliability and performance of the engine system ³.

Conclusion

The 3907998 Round Head Cap Screw is a critical component in the maintenance and operation of commercial trucks. Its design, featuring a rounded head and threaded body, allows for easy installation and a secure connection. The screw is made from high-quality materials, ensuring durability and resistance to wear. It is used in various applications within commercial trucks, from fastening engine components to securing parts within the chassis. Proper installation and regular maintenance are essential to ensure the screw’s effectiveness and longevity. The compatibility of this screw with a wide range of Cummins engines underscores its versatility and importance in maintaining the reliability and performance of commercial truck systems.