3681065
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3681065, is a component manufactured by Cummins, a well-established name in the automotive and heavy-duty truck industry. This screw is significant in commercial trucks due to its robust design and reliable performance, contributing to the overall efficiency and durability of truck operations.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flange beneath the head. The hexagonal head allows for efficient torque application using standard tools, while the flange provides a larger bearing surface that helps distribute the load more evenly, reducing the risk of damage to the fastened material. Within mechanical systems, these screws are used to secure components together, ensuring stability and integrity under various operational conditions ¹.

Purpose and Role in Truck Operation

The 3681065 Hexagon Flange Head Cap Screw plays a specific role in the operation of a truck by securing various components that are critical to the truck’s performance. It is commonly used in applications where high tensile strength and resistance to loosening are required. This includes fastening engine components, transmission parts, and chassis elements. The screw’s design ensures that these components remain securely in place, even under significant stress and vibration, which are common in truck operations ².

Key Features

The 3681065 Hexagon Flange Head Cap Screw features a hexagonal head that facilitates easy and precise tightening using common tools. The flange beneath the head provides additional surface area, which helps in distributing the clamping force more effectively. This screw is typically made from high-strength materials, such as alloy steel, which offers excellent durability and resistance to corrosion. These features make it suitable for demanding applications in the trucking industry ³.

Benefits

Using the 3681065 Hexagon Flange Head Cap Screw offers several advantages. Its hexagonal head design allows for efficient torque application, reducing the time required for installation. The flange characteristic enhances the screw’s ability to resist loosening, which is crucial in dynamic environments like those found in commercial trucks. Additionally, the material properties of the screw contribute to its durability, ensuring long-term performance and reliability ⁴.

Installation and Usage

Proper installation of the 3681065 Hexagon Flange Head Cap Screw is vital to ensure its effectiveness. It is recommended to use the appropriate torque specifications provided by the manufacturer to avoid over-tightening or under-tightening. Best practices include cleaning the mating surfaces before installation to prevent corrosion and ensuring that the screw is aligned correctly with the hole to avoid cross-threading. Using a torque wrench is advisable to achieve the precise torque required for optimal performance.

Troubleshooting and Maintenance

Common issues associated with Hexagon Flange Head Cap Screws include loosening due to vibration and corrosion. Regular inspection and maintenance can help identify these issues early. If loosening is detected, re-tightening the screw to the specified torque is recommended. In cases of corrosion, cleaning the affected area and applying a suitable anti-corrosive coating can help prevent further degradation. Proper maintenance practices ensure the longevity and performance of the screw.

Manufacturer - Cummins

Cummins is a reputable manufacturer with a long-standing history in the automotive and heavy-duty truck industry. Known for its commitment to quality and innovation, Cummins has established a strong reputation for producing reliable and high-performance components. The company’s dedication to excellence is reflected in its wide range of products, including the 3681065 Hexagon Flange Head Cap Screw, which is designed to meet the rigorous demands of commercial truck applications.

Hexagon Flange Head Cap Screw 3681065 in Cummins Engines

The Hexagon Flange Head Cap Screw 3681065, manufactured by Cummins, is a critical component in various Cummins engine models. This part is designed to secure and stabilize different engine components, ensuring the integrity and performance of the engine.

4B3.9, 6B5.9, 6C8.3, B3.3, B4.5, B4.5 CM2350 B129B, B5.9 G, B6.7 CM2350 B135B, B6.7 CM2670 B153B, C GAS PLUS CM556, C8.3 G, F3.8 CM2350 F120B, F3.8 CM2620 F137B, F4.5 CM2620 F139B, G5.9, G5.9 CM558

In these engines, the 3681065 screw is used to fasten various parts of the engine’s structure, including the cylinder heads, intake manifolds, and other critical assemblies. Its design allows for a secure and tight fit, which is essential for maintaining the engine’s operational efficiency and preventing leaks.

ISB CM550, ISB CM850, ISB/ISD4.5 CM2150 B119, ISB4.5 CM2350 B104, ISBE CM2150, ISBE4 CM850, ISC CM2150, ISC CM554, ISC CM850

For the ISB, ISBE, and ISC series engines, the 3681065 screw plays a vital role in securing the engine’s internal and external components. These engines, known for their durability and performance, require high-quality fasteners to maintain their structural integrity. The screw’s hexagonal flange head provides a larger surface area for torque application, ensuring that the fastener remains tight under the engine’s operational stresses.

The 3681065 screw is a testament to Cummins’ commitment to quality and reliability, ensuring that each engine component is securely fastened and performs optimally.

Hexagon Flange Head Cap Screw (Part 3681065) Component Usage

The Hexagon Flange Head Cap Screw, identified by part number 3681065, is integral in the assembly and maintenance of various engine systems. Its design allows for secure fastening in applications where vibration resistance and torque retention are essential.

Aftercooler

In aftercooler systems, the Hexagon Flange Head Cap Screw is used to secure components that require a robust connection to withstand the high pressures and temperatures involved in cooling the compressed air.

Air Compressor and Air Compressor Mounting

This screw is employed in the assembly of air compressors, ensuring that the compressor housing is firmly attached to its mounting. It helps maintain the structural integrity of the compressor under operational stress.

Air Intake Manifold

When attaching the air intake manifold to the engine block, the Hexagon Flange Head Cap Screw provides a vibration-resistant fastening solution, which is vital for maintaining the manifold’s alignment and sealing efficiency.

Alternator Mounting

For alternator mounting, this screw ensures that the alternator is securely fastened to the engine, allowing it to operate efficiently without the risk of loosening due to engine vibrations.

Engine Brake

In engine brake systems, the screw is used to secure components that engage and disengage the braking mechanism, ensuring reliable operation under varying load conditions.

Engine Lifting Bracket

During engine maintenance or replacement, the Hexagon Flange Head Cap Screw is utilized in engine lifting brackets to provide a secure connection point for lifting equipment, ensuring safety and stability.

Engine Support Arrangement

This screw plays a role in the engine support arrangement by fastening support brackets and mounts, which are essential for maintaining the engine’s position within the vehicle’s frame.

Fan Drive

In fan drive assemblies, the screw is used to secure the fan to the engine, ensuring that the fan operates efficiently to cool the engine under all operating conditions.

Front Engine Support and Front Gear Cover

For the front engine support and front gear cover, the screw provides a strong and durable fastening solution, which is necessary to withstand the dynamic forces at the front of the engine.

Front Gear Housing

Within the front gear housing, the Hexagon Flange Head Cap Screw is used to secure gears and other components, ensuring precise alignment and operation.

Fuel Pump

In fuel pump assemblies, this screw is used to secure the pump to its housing, ensuring a leak-free connection and stable operation.

Gear Housing

Throughout various gear housings, the screw is employed to fasten gears and shafts, providing the necessary strength to handle the transmission of power.

Long Block

During the assembly of a long block, the screw is used to secure various components, ensuring that the engine block, crankshaft, pistons, and other parts are held together firmly.

Lubricating Oil Filter

The Hexagon Flange Head Cap Screw is utilized in the mounting of the lubricating oil filter, ensuring a secure and leak-free connection to the engine block.

Rear Engine Support and Rear Gear Housing

At the rear of the engine, this screw is used in the support arrangement and gear housing to maintain structural integrity and alignment.

Refrigerant Compressor

In refrigerant compressor systems, the screw is used to secure the compressor to its mounting, ensuring stable operation and efficient cooling.

Service Kit

Within service kits, the Hexagon Flange Head Cap Screw is often included for the reassembly of engine components, providing a reliable fastening solution.

Transfer Case

For transfer cases, the screw is used to secure the case to the transmission, ensuring a strong and durable connection.

Turbocharger Kit and Turbocharger Plumbing

In turbocharger kits and plumbing, the screw is employed to secure turbocharger components and plumbing connections, ensuring they withstand the high pressures and temperatures involved.

Vibration Isolator

The screw is used in vibration isolators to secure the isolator to the engine and frame, providing a stable connection that reduces engine vibrations.

Water Inlet Connection

Finally, in water inlet connections, the Hexagon Flange Head Cap Screw ensures a secure and leak-free attachment of the water inlet to the engine block, crucial for maintaining coolant flow and engine temperature regulation.

Conclusion

The 3681065 Hexagon Flange Head Cap Screw is a critical component in the automotive and heavy-duty truck industry, particularly in Cummins engines. Its robust design, high tensile strength, and resistance to loosening make it suitable for demanding applications. Proper installation and maintenance are essential to ensure its effectiveness and longevity. Cummins’ commitment to quality and reliability is evident in the design and performance of this part, ensuring that engine components are securely fastened and perform optimally.

References