3681056
Hexagon Flange Head Cap Screw
Cummins®

Introduction

The Cummins 3681056 Hexagon Flange Head Cap Screw is a specialized fastener designed for use in heavy-duty truck applications. Its purpose is to provide secure and reliable fastening in various truck components, ensuring the integrity and performance of the vehicle. The significance of this screw in heavy-duty truck operations lies in its ability to withstand harsh conditions and maintain a strong, stable connection between parts ¹.

Basic Concepts of Hexagon Flange Head Cap Screws

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flange feature. The hexagonal head allows for easy tightening and loosening using a wrench or socket, while the flange provides additional surface area for distribution of clamping force. This design enhances the screw’s ability to secure components firmly in place, reducing the risk of loosening over time ².

Role in Truck Operations

The 3681056 Hexagon Flange Head Cap Screw plays a role in the operation and maintenance of heavy-duty trucks by securing various components such as engine parts, transmission elements, and chassis assemblies. Its applications extend to critical areas where reliable fastening is necessary to ensure the truck’s performance and safety. The screw’s design allows it to handle the stresses and vibrations encountered in heavy-duty truck environments ¹.

Key Features

The Cummins 3681056 Hexagon Flange Head Cap Screw features a hexagonal head that facilitates easy and precise tightening. The flange at the base of the head provides additional contact area, enhancing the screw’s clamping force and stability. Constructed from high-quality materials, this screw is designed to offer durability and resistance to corrosion, making it suitable for the demanding conditions of heavy-duty truck applications ².

Benefits

The benefits of using the 3681056 Hexagon Flange Head Cap Screw include enhanced fastening security, resistance to loosening, and durability in harsh operating conditions. The screw’s design ensures a strong and stable connection between components, reducing the likelihood of fastener failure. Its resistance to corrosion and wear contributes to the longevity and reliability of the fastening solution in heavy-duty truck environments ¹.

Installation Guidelines

Proper installation of the 3681056 Hexagon Flange Head Cap Screw involves selecting the appropriate size and grade for the application, ensuring the mating surfaces are clean and free of debris, and using the correct torque specifications to achieve the desired clamping force. It is important to follow best practices for tightening, such as using a torque wrench to apply the specified torque in incremental steps, to ensure optimal performance and longevity of the fastener ².

Maintenance Tips

To maintain the 3681056 Hexagon Flange Head Cap Screw, periodic inspection for signs of wear, corrosion, or loosening is recommended. Lubrication of the screw and its mating surfaces can help reduce friction and wear, prolonging the fastener’s service life. Replacement guidelines should be followed when signs of damage or excessive wear are observed to prevent failure and ensure continued reliability ¹.

Troubleshooting Common Issues

Common issues associated with the 3681056 Hexagon Flange Head Cap Screw include loosening, corrosion, and damage. Loosening can often be addressed by re-tightening the screw to the specified torque. Corrosion may require cleaning and possible replacement of the fastener. Damage to the screw or its mating surfaces may necessitate replacement to restore the integrity of the fastening solution. Preventive measures, such as proper installation and maintenance, can help mitigate these issues ².

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins serves customers in approximately 190 countries and territories through a network of company-owned and independent distributor facilities and dealerships. The company’s reputation in the automotive and heavy-duty truck industries is built on its commitment to providing reliable, high-performance products and solutions ¹.

Hexagon Flange Head Cap Screw (Part 3681056) in Cummins Engines

The Hexagon Flange Head Cap Screw, identified by part number 3681056, is a critical component in several Cummins engine models. This screw is designed to secure various parts within the engine assembly, ensuring structural integrity and operational efficiency. Below is a detailed overview of how this part is utilized across different Cummins engine models.

ISX Series Engines

• ISX CM570
• ISX CM870
• ISX CM871

In the ISX series engines, the 3681056 screw is often used to secure the cylinder head to the engine block. This application is crucial for maintaining the sealing of combustion chambers and preventing leaks. The screw’s design allows for precise torque application, which is essential for the longevity and performance of the engine ¹.

ISX15 Series Engines

• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101

For the ISX15 series, the 3681056 screw is frequently employed in securing various engine components, including the intake manifold and exhaust components. Its flange head design provides a larger surface area for torque application, ensuring that these parts remain tightly fastened under operational stresses ².

QSX15 Series Engines

• QSX15 CM2250
• QSX15 CM2250 ECF
• QSX15 CM2350 X105

In the QSX15 series, the 3681056 screw is utilized in similar applications as in the ISX15 series. It is commonly found securing the turbocharger housing and other critical components. The screw’s robust design ensures that these parts remain securely fastened, even under high-stress conditions ¹.

X15 Series Engines

• X15 CM2350 X116B
• X15 CM2350 X123B
• X15 CM2450 X134B

In the X15 series engines, the 3681056 screw is used to secure a variety of engine components, including the valve cover and other ancillary parts. Its flange head design allows for easy access and removal, which is essential during maintenance and repair procedures. The screw’s ability to withstand high torque levels ensures that these components remain securely fastened, contributing to the engine’s overall reliability and performance ².

Hexagon Flange Head Cap Screw (Part 3681056) Usage in Engine Systems

The Hexagon Flange Head Cap Screw, identified by part number 3681056, is integral to the assembly and maintenance of various engine systems. Its design and functionality are tailored to ensure secure fastening and reliable performance in demanding environments.

Front Engine Support

In the front engine support system, the Hexagon Flange Head Cap Screw plays a significant role in attaching the engine to the vehicle’s chassis. This component ensures that the engine remains firmly in place, absorbing vibrations and stresses generated during operation. The flange head provides additional surface area for distribution of clamping force, reducing the risk of screw pull-out and enhancing the overall stability of the engine mount.

The screw’s hexagonal head allows for easy tightening and loosening using standard tools, facilitating routine maintenance and adjustments. Its cap design protects the screw from contaminants and corrosion, prolonging its service life and maintaining the integrity of the engine support structure ¹.

Conclusion

The Cummins 3681056 Hexagon Flange Head Cap Screw is a vital component in the maintenance and operation of heavy-duty trucks and Cummins engines. Its design, featuring a hexagonal head and flange, ensures secure fastening and reliable performance in demanding environments. Proper installation, maintenance, and troubleshooting are essential to maximize the benefits of this screw, contributing to the overall integrity and performance of the vehicle and engine systems ¹².