3954701
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3954701 and manufactured by Cummins, is a specialized fastener designed for heavy-duty truck applications. Cummins, a well-established name in the heavy-duty truck industry, produces this screw to meet the demanding requirements of truck mechanics and operators. This screw is integral to the secure assembly of various truck components, ensuring both the integrity and stability of the vehicle’s structure.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of bolt characterized by its hexagonal head and flanged base. This design allows for efficient tightening and loosening using standard tools, such as wrenches or socket drivers. In mechanical assemblies, these screws play a role in securing components by providing a strong, stable connection that can withstand significant stress and vibration. The flange at the base of the screw serves to distribute the load more evenly across the surface it contacts, enhancing the overall security of the fastening ¹.

Purpose and Role in Truck Operation

The 3954701 Hexagon Flange Head Cap Screw by Cummins is specifically engineered to address the rigorous demands of heavy-duty truck operations. It secures critical components within the truck’s structure, ensuring that parts remain firmly in place despite the vibrations and stresses encountered during operation. This screw contributes to the overall stability and safety of the truck by maintaining the integrity of its assembled parts.

Key Features

The 3954701 Hexagon Flange Head Cap Screw boasts several key features that enhance its performance and durability. Its hexagonal head allows for straightforward installation and removal using common tools, while the flange provides additional surface area for load distribution. The screw is crafted from high-quality materials, ensuring it can withstand the harsh conditions typical of heavy-duty truck environments. These material properties contribute to its resistance to corrosion and fatigue, prolonging its service life.

Benefits

Using the 3954701 Hexagon Flange Head Cap Screw offers several advantages. The design of the screw enhances fastening security, reducing the likelihood of components becoming loose over time. Its resistance to vibration ensures that connections remain stable, even under demanding operating conditions. Additionally, the ease of installation and removal simplifies maintenance procedures, allowing for quick and efficient servicing of truck components.

Installation and Usage

Proper installation of the 3954701 Hexagon Flange Head Cap Screw is vital to ensure optimal performance. It is recommended to follow torque specifications provided by Cummins to achieve the correct tension without overtightening, which could lead to damage. Using the appropriate tools and techniques during installation will help maintain the screw’s integrity and the stability of the fastened components.

Troubleshooting and Maintenance

Common issues with the 3954701 Hexagon Flange Head Cap Screw may include loosening due to vibration or corrosion over time. Regular inspection and maintenance can help identify these problems early. If loosening is detected, re-tightening to the specified torque is recommended. To prevent corrosion, applying a suitable anti-corrosion treatment can be beneficial. These maintenance practices will help prolong the lifespan of the screw and ensure continued reliable performance.

Cummins Overview

Cummins Inc. is a globally recognized leader in the design, manufacture, and distribution of diesel and natural gas engines, as well as related technologies. With a history spanning over a century, Cummins has established a reputation for producing high-quality, reliable components for the heavy-duty truck industry. Their commitment to innovation and excellence makes them a trusted source for truck operators and mechanics seeking durable and efficient parts.

Hexagon Flange Head Cap Screw 3954701 in Cummins Engines

The Hexagon Flange Head Cap Screw part number 3954701, manufactured by Cummins, is a critical component in several of their engine models. This screw is integral in securing various parts within the engine assembly, ensuring structural integrity and operational efficiency.

ISB CM850

In the ISB CM850 engine, the 3954701 screw is used to fasten components that require a robust connection. Its design allows for precise torque application, which is essential for maintaining the alignment and stability of engine parts.

QSK60 G CM2358 K110 and QSK60G

For the QSK60 G CM2358 K110 and QSK60G engines, the 3954701 screw plays a vital role in securing heavy-duty components. The flange head design provides a larger surface area for the wrench, facilitating easier and more effective tightening. This is particularly important in high-stress environments where the engine operates under significant load.

QST30 CM2350 T101

In the QST30 CM2350 T101 engine, the 3954701 screw is utilized in various applications, including the fastening of engine covers and other structural elements. The screw’s ability to withstand high torque and its resistance to loosening under vibration make it an ideal choice for these applications.

The consistent use of the 3954701 screw across these engine models underscores its importance in ensuring the reliability and performance of Cummins engines.

Hexagon Flange Head Cap Screw in Engine Systems

The part 3954701 Hexagon Flange Head Cap Screw is integral to the secure assembly and operation of various engine components. Its robust design ensures reliable fastening in high-stress environments, contributing to the overall efficiency and durability of the engine system.

Turbocharger Arrangement

In turbocharger setups, the Hexagon Flange Head Cap Screw is used to fasten the turbocharger to the engine block or manifold. This secure attachment is essential for maintaining the turbocharger’s alignment and operational integrity. The screw’s flange head provides additional surface area for torque application, ensuring a tight and stable connection that can withstand the high rotational speeds and temperatures associated with turbocharger operation.

Exhaust Manifold and Turbocharger Integration

When connecting the turbocharger to the exhaust manifold, the Hexagon Flange Head Cap Screw plays a key role. It ensures that the connection between the turbocharger and manifold remains secure, preventing leaks and maintaining the efficiency of the exhaust flow. The screw’s design allows for precise torque application, which is vital for sealing the joint and optimizing turbocharger performance.

Exhaust Temperature Control

In systems designed for exhaust temperature control, the Hexagon Flange Head Cap Screw is employed to secure temperature sensors or control valves. These components must be firmly attached to provide accurate readings and effective control over exhaust temperatures. The screw’s flange head offers enhanced torque distribution, ensuring that these critical components remain in place under varying thermal conditions.

Exhaust Recirculation Systems

For exhaust gas recirculation (EGR) systems, the Hexagon Flange Head Cap Screw is used to fasten EGR valves and related components. Secure fastening is necessary to prevent leaks and ensure that the recirculated exhaust gases are properly mixed with the intake air. This contributes to reduced emissions and improved engine efficiency. The screw’s design facilitates easy installation and removal, aiding in maintenance and adjustments.

Turbocharger Valves

Turbocharger valves, such as wastegates and blow-off valves, rely on the Hexagon Flange Head Cap Screw for secure attachment. These valves regulate turbocharger boost pressure, and their proper functioning depends on a stable and leak-free connection. The screw’s flange head allows for consistent torque application, ensuring that the valves operate within specified parameters and contribute to optimal turbocharger performance.

Conclusion

Overall, the part 3954701 Hexagon Flange Head Cap Screw is a versatile and reliable fastening solution in various engine system components, enhancing both performance and durability. Its consistent use across different Cummins engine models underscores its importance in ensuring the reliability and performance of heavy-duty truck engines.