3638713
Hexagon Head Cap Screw
Cummins®

Introduction

The Cummins 3638713 Hexagon Head Cap Screw is a specialized fastener designed for use in heavy-duty truck maintenance and operation. This screw plays a significant role in securing various components within the truck’s mechanical systems, ensuring stability and reliability under demanding conditions.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of bolt characterized by its hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. These screws are widely used in mechanical assemblies to secure components together, providing a strong and durable connection. They are particularly valued for their ability to distribute load evenly and resist loosening over time ¹.

Purpose of the Cummins 3638713 Hexagon Head Cap Screw

The Cummins 3638713 Hexagon Head Cap Screw is specifically designed to meet the rigorous demands of heavy-duty truck applications. It is used in various truck components and systems, including engine assemblies, transmission housings, and chassis structures. By securing these critical parts, the screw helps maintain the integrity and performance of the truck under heavy loads and harsh operating conditions ².

Key Features

The Cummins 3638713 Hexagon Head Cap Screw boasts several key features that enhance its performance and durability. These include a high-strength material composition, typically alloy steel, which provides excellent tensile strength and resistance to wear. The screw features a fine or coarse thread, depending on the application, ensuring a secure fit in a variety of materials. Its hexagonal head design allows for easy installation and removal using standard tools, while any unique attributes, such as a corrosion-resistant coating, further improve its longevity in demanding environments ³.

Benefits

Using the Cummins 3638713 Hexagon Head Cap Screw offers several benefits. Its high-strength material and precise thread design contribute to improved reliability, ensuring that critical components remain securely fastened. The screw’s ease of installation, facilitated by its hexagonal head, reduces downtime during maintenance procedures. Additionally, its resistance to wear and corrosion enhances the screw’s longevity, making it a cost-effective solution for heavy-duty truck applications ⁴.

Installation and Usage

Proper installation of the Cummins 3638713 Hexagon Head Cap Screw is crucial for ensuring its effectiveness and longevity. It is recommended to use the appropriate torque specifications provided by Cummins to achieve the correct tension without overtightening, which could damage the screw or the components being fastened. Standard wrenches or sockets are typically used for installation, ensuring a secure and efficient process.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws may include loosening over time, corrosion, or damage from overtightening. Regular inspection and maintenance can help identify these issues early. Troubleshooting tips include checking for proper torque, ensuring the screw and mating surfaces are clean and free of debris, and replacing screws that show signs of wear or corrosion. Adhering to these practices will help maintain the screw’s performance and extend its service life.

Safety Considerations

When working with Hexagon Head Cap Screws, it is important to observe several safety practices. Proper handling involves using the correct tools to avoid damage to the screw or surrounding components. Storage should be in a dry, corrosion-resistant environment to prevent degradation. Disposal methods should comply with local regulations to ensure environmental safety.

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 automotive and heavy-duty truck industry. Their product range includes a variety of components and systems designed to enhance the performance, reliability, and efficiency of vehicles and equipment.

Cummins Engine Hexagon Head Cap Screw 3638713

The Cummins Hexagon Head Cap Screw part number 3638713 is a critical component in the assembly and maintenance of several Cummins engine models. This part is designed to provide secure fastening in various engine applications, ensuring structural integrity and operational efficiency.

K50 Series

In the K50 series engines, the Hexagon Head Cap Screw 3638713 is utilized in several key areas. It is often employed in the engine block assembly, securing various components together to maintain the engine’s structural stability. This screw is also used in the cylinder head assembly, ensuring that the head is properly fastened to the engine block, which is crucial for maintaining proper sealing and performance.

KTA38GC CM558 and QSK38 Series

For the KTA38GC CM558 engine, the Hexagon Head Cap Screw 3638713 plays a vital role in the engine’s assembly. It is used in both the engine block and the cylinder head, providing the necessary fastening to keep these components securely in place. In the QSK38 series, which includes models like the QSK38 CM2150 MCRS and QSK38 CM850 MCRS, this screw is similarly essential. It is used in the engine block, cylinder head, and other critical assemblies to ensure the engine operates smoothly and reliably.

QSK50 Series

The QSK50 series engines, including the QSK50 CM2150 K107, QSK50 CM2150 MCRS, QSK50 CM2350 K108, and others, also rely on the Hexagon Head Cap Screw 3638713 for various applications. In these engines, the screw is used in the engine block assembly, securing the block to other components and ensuring the engine’s structural integrity. It is also used in the cylinder head assembly, where it helps maintain the head’s proper alignment and sealing.

Overall, the Hexagon Head Cap Screw 3638713 is a fundamental part in the assembly and maintenance of these Cummins engines, ensuring that all components are securely fastened and the engine operates efficiently.

Role of Part 3638713 Hexagon Head Cap Screw in Engine Systems

Base Parts

In the assembly of base parts, the 3638713 Hexagon Head Cap Screw is instrumental in securing various components to the engine block. This screw ensures that parts remain firmly in place, providing stability and preventing vibrations that could lead to loosening over time. Its hexagonal head allows for efficient tightening using a socket wrench, ensuring a snug fit without over-tightening, which could damage the threads or the base material.

Water Pump

When integrating the water pump into an engine system, the 3638713 Hexagon Head Cap Screw plays a significant role in attaching the pump housing to the engine block. This secure attachment is vital for maintaining the integrity of the cooling system, ensuring that the water pump can operate efficiently without any risk of detachment. The screw’s design allows for precise torque application, which is essential for the proper sealing of the water pump to prevent coolant leaks.

Water Pump Kit

In a comprehensive water pump kit, the 3638713 Hexagon Head Cap Screw is often included to facilitate the installation of the new water pump. This screw is used to attach various components within the kit, such as the pump housing, impeller, and gaskets, to the engine block. Its reliable holding power ensures that all parts of the water pump kit are securely fastened, contributing to the overall effectiveness of the cooling system. The ease of use with standard tools makes it a preferred choice for both professional mechanics and DIY enthusiasts.

Conclusion

The Cummins 3638713 Hexagon Head Cap Screw is a critical component in the maintenance and operation of heavy-duty trucks and Cummins engines. Its high-strength material, precise thread design, and ease of installation make it an essential part for securing various components within the engine systems. Proper installation, regular maintenance, and adherence to safety practices ensure the longevity and reliability of this Cummins part, contributing to the overall performance and efficiency of the vehicle.