3970810
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 3970810, is a component manufactured by Cummins, a leader in diesel engine technology. This screw is significant in the realm of heavy-duty trucks due to its robust design and reliable performance. It is utilized in various applications within truck assemblies, contributing to the structural integrity and operational efficiency of the vehicle ¹.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by a hexagonal head and a flange beneath the head. The hexagonal head allows for efficient torque application using standard tools, while the flange provides additional surface area to distribute load and prevent the screw from sinking into the material. In heavy-duty trucks, cap screws like the 3970810 are employed in fastening applications where high strength and resistance to loosening are required ².

Purpose and Role in Truck Operation

This Cummins part plays a specific role in the operation of a truck by securing critical components together. It ensures that parts remain firmly attached under various operational stresses, contributing to the overall assembly and integrity of the truck. This screw is often used in applications where vibration and dynamic loads are present, making its secure fastening capabilities vital for maintaining the structural soundness of the vehicle ³.

Key Features

The 3970810 boasts several key features that enhance its performance and reliability. Its hexagonal head design allows for straightforward and effective torque application, while the flange provides added stability and load distribution. The screw is crafted from high-quality materials, ensuring durability and resistance to corrosion, which is particularly important in the harsh environments often encountered by heavy-duty trucks.

Benefits

The benefits of using the 3970810 include improved torque application due to its hexagonal head, enhanced resistance to loosening thanks to the flange, and superior durability in demanding operating conditions. These attributes make it a reliable choice for critical fastening applications in heavy-duty trucks.

Installation Considerations

Proper installation of the 3970810 is crucial for ensuring secure fastening. It is recommended to follow torque specifications provided by the manufacturer to avoid over-tightening or under-tightening. Using the appropriate tools, such as a torque wrench, and adhering to best practices, such as lubricating the threads, can help achieve optimal fastening.

Troubleshooting and Maintenance

Common issues with the 3970810 may include loosening or corrosion. Regular inspection and maintenance can help identify and address these problems early. Ensuring that the screw is properly torqued and protected from environmental factors can prolong its lifespan and maintain optimal performance.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes diesel and natural gas engines, as well as related technologies. With a history spanning over a century, Cummins is renowned for its expertise in engine manufacturing and its commitment to quality and innovation. The company’s products are designed to deliver reliable performance in a variety of applications, including heavy-duty trucks.

Hexagon Flange Head Cap Screw 3970810 in Cummins Engines

The Hexagon Flange Head Cap Screw part number 3970810, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is designed to secure different parts within the engine assembly, ensuring structural integrity and operational efficiency. Below is a detailed description of how this part is utilized across a selection of Cummins engines.

6C8.3 and C8.3 G Engines

In the 6C8.3 and C8.3 G engines, the 3970810 screw is often used to fasten components of the engine’s cylinder head. Its flange head design provides a larger bearing surface, which is essential for distributing the clamping force evenly and preventing damage to the engine parts.

G8.3 and G8.3 CM558 Engines

For the G8.3 and G8.3 CM558 engines, the 3970810 screw is frequently employed in securing the engine’s exhaust manifold. This application requires a screw that can withstand high temperatures and maintain its fastening properties under thermal stress.

GTA8.3 CM558 and ISC CM2150 Engines

In the GTA8.3 CM558 and ISC CM2150 engines, the 3970810 screw is used to fasten various components of the engine’s intake and exhaust systems. The screw’s design ensures that these systems remain securely attached, which is crucial for maintaining optimal engine performance.

ISC CM554 and ISC CM850 Engines

For the ISC CM554 and ISC CM850 engines, the 3970810 screw is utilized in the assembly of the engine’s fuel injection system. The screw’s ability to provide a tight and reliable connection is vital for the precise operation of the fuel injectors.

ISC8.3 CM2250 and ISL CM2150 Engines

In the ISC8.3 CM2250 and ISL CM2150 engines, the 3970810 screw is used to secure parts of the engine’s turbocharger system. The screw’s strength and durability are essential for maintaining the integrity of the turbocharger assembly under high-pressure conditions.

ISL CM554 and ISL G CM2180 Engines

For the ISL CM554 and ISL G CM2180 engines, the 3970810 screw is employed in the assembly of the engine’s cooling system. The screw’s design ensures that the cooling system components remain securely attached, which is crucial for maintaining the engine’s optimal operating temperature.

ISL9 CM2150 SN and ISL9 CM2250 Engines

In the ISL9 CM2150 SN and ISL9 CM2250 engines, the 3970810 screw is used to fasten parts of the engine’s valve train. The screw’s ability to provide a secure and reliable connection is vital for the precise operation of the engine’s valves.

ISL9.5 CM2880 L138 Engine

For the ISL9.5 CM2880 L138 engine, the 3970810 screw is utilized in the assembly of the engine’s transmission system. The screw’s strength and durability are essential for maintaining the integrity of the transmission components under high-stress conditions.

L GAS PLUS CM556 and L8.9 Engines

In the L GAS PLUS CM556 and L8.9 engines, the 3970810 screw is used to secure parts of the engine’s fuel system. The screw’s design ensures that the fuel system components remain securely attached, which is crucial for maintaining the engine’s fuel efficiency and performance.

L8.9 CM2670 L134C and L8.9G CMOH2.0 L125B Engines

For the L8.9 CM2670 L134C and L8.9G CMOH2.0 L125B engines, the 3970810 screw is employed in the assembly of the engine’s lubrication system. The screw’s ability to provide a tight and reliable connection is vital for the precise operation of the engine’s oil pump and other lubrication components.

L9 CM2670 L128B and L9.3 L105 Engines

In the L9 CM2670 L128B and L9.3 L105 engines, the 3970810 screw is used to fasten parts of the engine’s electrical system. The screw’s design ensures that the electrical system components remain securely attached, which is crucial for maintaining the engine’s electrical integrity.

L9.5 L117 and QSC8.3 CM2880 C102 Engines

For the L9.5 L117 and QSC8.3 CM2880 C102 engines, the 3970810 screw is utilized in the assembly of the engine’s air intake system. The screw’s strength and durability are essential for maintaining the integrity of the air intake components under high-pressure conditions.

Hexagon Flange Head Cap Screw (Part 3970810) Usage in Engine Systems

The Hexagon Flange Head Cap Screw, identified by part number 3970810, is a versatile fastener utilized in various engine systems to ensure secure and reliable assembly of components. Its design and functionality make it suitable for a range of applications within engine construction and repair.

Block Kit

In a block kit, the Hexagon Flange Head Cap Screw is often used to fasten the cylinder block to the engine frame or other supporting structures. This ensures that the block remains securely in place during engine operation, contributing to the overall stability and performance of the engine.

Crankshaft and Bearings

When assembling the crankshaft and its associated bearings, these screws play a significant role. They are used to secure the main bearing caps to the cylinder block, ensuring that the crankshaft is properly aligned and supported. This alignment is essential for smooth operation and longevity of the crankshaft.

Cylinder Block

For the cylinder block itself, the Hexagon Flange Head Cap Screw is employed to attach various components such as the cylinder head, valve covers, and other ancillary parts. This secure attachment is vital for maintaining the integrity of the cylinder block and ensuring that all components function as a cohesive unit.

Engine Block

In the context of the engine block, these screws are used to fasten components like the oil pan, timing covers, and other external parts. This secures the engine block and ensures that all external components are properly aligned and sealed, preventing oil leaks and other potential issues.

Long Block and Short Block

For both long block and short block assemblies, the Hexagon Flange Head Cap Screw is instrumental in attaching critical components. In a short block, it is used to secure the crankshaft, main bearings, and connecting rods. In a long block, additional components such as the cylinder head and valve train are also fastened using these screws, ensuring a robust and reliable engine assembly.

Repair Kit

In repair kits, these screws are often included to replace worn or damaged fasteners. Their use in repair scenarios ensures that the engine can be reassembled with the same level of security and reliability as the original construction.

Short Block 6cart

Specifically for the short block 6cart, the Hexagon Flange Head Cap Screw is used to secure the six-cylinder arrangement. This ensures that each cylinder is properly aligned and supported, contributing to the balanced operation of the engine.

Conclusion

Overall, the Hexagon Flange Head Cap Screw (part 3970810) is an essential component in the assembly and repair of various engine systems, providing the necessary security and reliability for optimal engine performance.