3931446
Hexagon Head Cap Screw
Cummins®

The Hexagon Head Cap Screw, specifically Part #3931446 by Cummins, is a fundamental component utilized in commercial trucks. It contributes to maintaining the structural integrity and functionality of various truck components. This screw is integral to the assembly and securement of parts within the truck, ensuring that components remain firmly in place under operational conditions.

Basic Concepts of Hexagon Head Cap Screw

A Hexagon Head Cap Screw is characterized by its hexagonal head, which allows for efficient tightening and loosening using common tools such as wrenches or sockets. The screw’s design includes threading that engages with the internal threads of a nut or directly into a tapped hole, providing a secure fastening mechanism. Typically, these screws are constructed from materials like steel or stainless steel, chosen for their strength and resistance to corrosion ¹.

Role of the 3931446 Hexagon Head Cap Screw in Truck Operation

This Cummins part plays a specific role in the operation of a truck. It is applied in various components and systems, including engine mounts, chassis assemblies, and other critical areas where secure fastening is required. This screw ensures that parts remain correctly aligned and securely fastened, which is vital for the safe and efficient operation of the truck ².

Key Features

The 3931446 Hexagon Head Cap Screw boasts several key features that make it suitable for demanding applications in commercial trucks. These features include high strength and durability, which allow it to withstand significant stress and load. Additionally, the screw is designed to resist vibration loosening, ensuring that fastenings remain secure over time. Its hexagonal head facilitates easy installation and removal using standard tools, enhancing maintenance efficiency.

Benefits

Using this part offers several benefits. It enhances the reliability of truck components by providing a secure and durable fastening solution. The screw’s resistance to vibration loosening contributes to the longevity of fastenings, reducing the need for frequent re-tightening. Moreover, its ease of installation and removal using common tools improves efficiency in truck maintenance and operation.

Troubleshooting and Maintenance

Common issues associated with Hexagon Head Cap Screws include improper torque, signs of wear or damage, and potential loosening over time. To ensure longevity and proper function, it is important to check that screws are tightened to the manufacturer’s specified torque settings. Regular inspections for signs of wear, corrosion, or damage are recommended. If a screw shows signs of significant wear or damage, it should be replaced to maintain the integrity of the fastening.

About Cummins

Cummins Inc. is a renowned manufacturer in the commercial truck industry, known for its commitment to quality and innovation. With a rich history and a diverse product range, Cummins has established a strong reputation for producing reliable and high-performance truck components. The company’s dedication to excellence is evident in its manufacturing processes and the durability of its products, including the 3931446 Hexagon Head Cap Screw.

Compatibility with Cummins Engines

The 3931446, a Hexagon Head Cap Screw, is designed to fit a variety of Cummins engines. This screw is integral in securing various components within the engine assembly, ensuring structural integrity and proper functioning. Below is a detailed overview of the compatibility of this screw with different Cummins engine models:

B Series Engines

• B5.9 GAS PLUS CM556
• B6.7 CM2670 B153B

This Cummins part is utilized in the B series engines to secure components that require precise fastening. These engines, known for their robust performance, benefit from the reliability and strength provided by this screw.

C Series Engines

• C GAS PLUS CM556

In the C series engines, the screw is used in applications where secure fastening is critical. The 3931446 part number ensures that the components remain tightly fastened, contributing to the engine’s overall durability.

D Series Engines

• D4.0 CM2620 D103B
• F4.5 CM2620 F139B

For the D series engines, the Hexagon Head Cap Screw 3931446 is employed in various critical applications. Its design allows for easy installation and removal, making it suitable for frequent maintenance tasks.

ISB Series Engines

• ISB CM2150
• ISB CM550
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB5.9G CM2180
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118

The ISB series engines, known for their versatility and power, incorporate the 3931446 screw in numerous applications. This screw is essential for maintaining the structural integrity of the engine components, ensuring reliable performance across various conditions.

ISBE Series Engines

• ISBE CM2150
• ISBE4 CM850

In the ISBE series engines, the Hexagon Head Cap Screw 3931446 is used to secure components that require a high level of precision and strength. Its design ensures that the components remain securely fastened, contributing to the engine’s longevity and performance.

ISC Series Engines

• ISC CM2150
• ISC CM554
• ISC CM850
• ISC8.3 CM2250

The ISC series engines utilize the 3931446 screw in various applications where secure fastening is crucial. This screw’s design allows for easy installation and removal, making it suitable for frequent maintenance tasks.

ISL Series Engines

• ISL CM2150
• ISL CM554
• ISL G CM2180
• ISL9 CM2150 SN
• ISL9 CM2250

In the ISL series engines, the Hexagon Head Cap Screw 3931446 is employed in applications that require reliable fastening. Its design ensures that the components remain securely fastened, contributing to the engine’s overall durability and performance.

Role of Part 3931446 Hexagon Head Cap Screw in Engine Systems

The 3931446 Hexagon Head Cap Screw is instrumental in ensuring the secure attachment and alignment of various components within engine systems. Its application is particularly significant in the context of the flexplate and flywheel assemblies.

Flexplate and Flywheel

In automatic transmission systems, the flexplate serves as a link between the engine and transmission. The 3931446 screw is utilized to fasten the flexplate to the crankshaft, ensuring a robust connection that can withstand the torque generated during operation. This secure attachment is vital for the efficient transfer of power from the engine to the transmission.

Similarly, in manual transmission systems, the flywheel plays a parallel role. The 3931446 screw is employed to mount the flywheel to the crankshaft, facilitating a stable and reliable power transmission. The screw’s hexagonal head allows for precise torque application, which is essential for maintaining the flywheel’s alignment and balance.

Flywheel Mounting

The mounting of the flywheel is a complex process that requires careful attention to detail. The 3931446 screw is integral to this process, providing the necessary strength and stability to the flywheel assembly. Its use ensures that the flywheel is securely fastened, minimizing the risk of misalignment or detachment during engine operation.

General Mounting Applications

Beyond the flexplate and flywheel, the 3931446 screw is also used in various other mounting applications within engine systems. Its design allows for easy installation and removal, making it a versatile component for securing different engine parts. The screw’s robust construction ensures that it can handle the stresses and vibrations inherent in engine operation, contributing to the overall reliability and performance of the engine system.

Conclusion

The 3931446 Hexagon Head Cap Screw by Cummins is a critical component in the maintenance and operation of commercial trucks. Its high strength, durability, and resistance to vibration loosening make it an ideal choice for securing various truck and engine components. Regular maintenance and proper torque settings are essential to ensure the longevity and reliability of this part. Cummins’ commitment to quality and innovation is reflected in the design and performance of this screw, making it a trusted component in the commercial truck industry.