4001378
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 4001378, is a specialized fastener produced by Cummins, a leading manufacturer in the commercial truck industry. This screw is integral to the maintenance and operation of commercial trucks, providing reliable fastening solutions that ensure the integrity and performance of various truck components.

Basic Concepts

The Hexagon Flange Head Cap Screw is designed with a hexagonal head and a flanged base. The hexagonal head allows for efficient torque application using standard tools, while the flange distributes the load more evenly across the surface it contacts. This design reduces the risk of the screw sinking into softer materials and enhances the overall stability of the fastening. The screw’s threaded shaft engages with corresponding female threads in the components it secures, creating a strong and durable connection ¹.

Purpose and Role in Truck Operation

The 4001378 Hexagon Flange Head Cap Screw plays a significant role in the operation and maintenance of commercial trucks. It is commonly used in applications where secure and stable fastening is required, such as in the attachment of engine components, chassis parts, and various assemblies. Its design ensures that critical components remain firmly in place, even under the demanding conditions encountered in commercial truck operations ².

Key Features

The 4001378 Hexagon Flange Head Cap Screw boasts several key features that contribute to its functionality and durability. The hexagonal head design allows for easy and precise torque application, ensuring that the screw is tightened to the correct specifications. The flange provides additional surface area for load distribution, reducing the risk of the screw pulling through the material. Additionally, the screw is typically made from high-strength materials, such as alloy steel, which enhances its resistance to corrosion and wear, ensuring long-term reliability in harsh operating environments ³.

Benefits

The 4001378 Hexagon Flange Head Cap Screw offers several advantages that make it a preferred choice for commercial truck applications. Its design allows for enhanced torque application, ensuring that the screw is tightened securely without the risk of over-tightening or stripping. The flange characteristic improves load distribution, reducing stress on the fastening point and minimizing the risk of the screw loosening over time. Furthermore, the material composition of the screw provides increased resistance to corrosion and wear, contributing to its durability and longevity in demanding truck environments ⁴.

Installation Guidelines

Proper installation of the 4001378 Hexagon Flange Head Cap Screw is crucial to ensure secure and effective fastening. Begin by cleaning the installation surface to remove any debris or contaminants. Use a torque wrench to apply the specified torque, ensuring that the screw is tightened to the manufacturer’s recommended specifications. It is important to avoid over-tightening, as this can lead to damage to the screw or the surrounding material. Additionally, ensure that the flange is seated properly against the surface to maximize load distribution and stability.

Troubleshooting and Maintenance

Common issues associated with the 4001378 Hexagon Flange Head Cap Screw include corrosion, stripping, and loosening. Regular inspection and maintenance can help identify and address these issues before they lead to more significant problems. If corrosion is detected, clean the affected area and apply a corrosion-resistant coating to prevent further degradation. In the case of stripping, replace the damaged screw with a new one to maintain the integrity of the fastening. To prevent loosening, ensure that the screw is properly torqued and that the flange is in full contact with the surface.

Safety Considerations

When working with the 4001378 Hexagon Flange Head Cap Screw, it is important to observe several safety guidelines and precautions. Always wear appropriate personal protective equipment, such as gloves and safety glasses, to protect against injury. Handle the screw carefully to avoid damage and store it in a dry, secure location to prevent corrosion. Dispose of any damaged or worn screws in accordance with local regulations to ensure environmental safety.

Cummins: Manufacturer Overview

Cummins Inc. is a globally recognized leader in the commercial truck industry, known for its commitment to quality and innovation. With a rich history spanning over a century, Cummins has established a reputation for producing reliable and high-performance components that meet the demanding needs of commercial truck operators. The company’s extensive product portfolio includes a wide range of engines, powertrains, and aftermarket parts, all designed to deliver exceptional performance and durability. Cummins’ dedication to excellence is evident in every product it manufactures, including the 4001378 Hexagon Flange Head Cap Screw.

Cummins Engine Hexagon Flange Head Cap Screw 4001378

The Cummins engine part 4001378, a Hexagon Flange Head Cap Screw, is a critical component in several Cummins engine models. This part is integral to the assembly and maintenance of the engines, ensuring structural integrity and operational efficiency.

QSK45 CM500 and QSK60 CM500

In the QSK45 CM500 and QSK60 CM500 engines, the Hexagon Flange Head Cap Screw 4001378 is used to secure various components, ensuring that parts remain tightly fastened under operational stresses. These engines are known for their robust design and reliability, and the use of this screw helps maintain their structural integrity.

QSK60 CM850 MCRS and QSK60 G CM2358 K110

For the QSK60 CM850 MCRS and QSK60 G CM2358 K110 engines, the Hexagon Flange Head Cap Screw 4001378 plays a similar role. It is employed in securing critical parts, contributing to the overall stability and performance of these engines. The MCRS designation indicates a specific configuration or feature set, and the screw is tailored to meet the demands of this setup.

QSK60G

In the QSK60G engine, the Hexagon Flange Head Cap Screw 4001378 is utilized to fasten components that are subject to high mechanical stress. This engine variant is designed for heavy-duty applications, and the screw’s design ensures that it can withstand the rigors of such environments.

QSK95 CM2350 K110 and QSK95 CM2350 K113

The QSK95 CM2350 K110 and QSK95 CM2350 K113 engines also incorporate the Hexagon Flange Head Cap Screw 4001378. These engines are part of Cummins’ high-performance lineup, and the screw is essential for maintaining the precision and reliability required in these models. The K110 and K113 designations likely refer to specific configurations or performance enhancements, and the screw is engineered to support these features.

The use of the Hexagon Flange Head Cap Screw 4001378 across these various engine models underscores its importance in ensuring the engines’ structural integrity and operational efficiency. Cummins’ design and engineering expertise ensures that this part meets the stringent demands of their high-performance engines.

Role of Part 4001378 Hexagon Flange Head Cap Screw in Engine Systems

Aftercooler

In the aftercooler system, the part 4001378 Hexagon Flange Head Cap Screw is utilized to secure various components that facilitate the cooling of compressed air from the turbocharger. This screw ensures the tight assembly of the aftercooler’s housing, which is essential for maintaining the efficiency of the cooling process. Proper sealing is vital to prevent any air leaks that could compromise the performance of the aftercooler, thereby ensuring that the air entering the engine is at an optimal temperature.

Lubricating Oil Filter

Within the lubricating oil filter assembly, the part 4001378 Hexagon Flange Head Cap Screw plays a significant role in securing the filter housing to its mounting bracket. This secure attachment is necessary to maintain the integrity of the filtration system, ensuring that oil passes through the filter media without bypassing, which could lead to contaminated oil circulating through the engine. The screw’s flange head provides additional surface area for a more robust connection, reducing the risk of vibrations loosening the filter over time.

Turbocharger Coolant Plumbing

In the turbocharger coolant plumbing, the part 4001378 Hexagon Flange Head Cap Screw is employed to fasten the coolant passages and fittings. This is important for maintaining a leak-free connection in the coolant system, which is essential for regulating the temperature of the turbocharger. Efficient cooling is necessary to prevent overheating, which can lead to reduced turbocharger efficiency and potential failure. The screw’s design allows for easy installation and removal, facilitating maintenance and ensuring that the coolant system remains in optimal condition.

Conclusion

The 4001378 Hexagon Flange Head Cap Screw is a vital component in the maintenance and operation of commercial trucks and Cummins engines. Its design, featuring a hexagonal head and flanged base, ensures secure and stable fastening, even under demanding conditions. The screw’s key features, including precise torque application and enhanced load distribution, contribute to its durability and reliability. Proper installation, regular maintenance, and adherence to safety guidelines are essential to maximize the performance and longevity of this Cummins part. Cummins’ commitment to quality and innovation is reflected in the design and engineering of the 4001378, ensuring it meets the stringent demands of high-performance engines.