4006861
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by part number 4006861 and manufactured by Cummins, is a specialized fastener designed for use in commercial trucks. Cummins, a well-respected name in the commercial truck industry, produces this screw to meet the demanding requirements of heavy-duty applications. This part is utilized in various fastening applications within commercial trucks, ensuring secure and reliable connections.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and a flange—a flat, circular plate—attached to the underside of the head. This design allows for efficient tightening using a wrench or socket, providing a stable and secure connection. The flange head offers additional benefits, such as distributing the load more evenly across the fastened surface and preventing the screw from sinking into soft materials.

Purpose and Role in Truck Operation

The 4006861 Hexagon Flange Head Cap Screw plays a significant role in the operation of commercial trucks by securing various components and assemblies. Its design ensures that critical parts remain firmly in place, even under the strenuous conditions encountered in heavy-duty applications. This screw is often used in areas where vibrations and dynamic loads are common, making its secure fastening capabilities particularly valuable.

Key Features

The 4006861 Hexagon Flange Head Cap Screw boasts several key features that contribute to its effectiveness. It is typically made from high-strength materials, such as alloy steel, to withstand the rigors of commercial truck use. The screw features a coarse or fine thread, depending on the application, which provides optimal holding power. The flange design not only aids in installation but also enhances the screw’s resistance to loosening over time.

Benefits

Using the 4006861 Hexagon Flange Head Cap Screw offers several advantages. Its flange head design provides enhanced stability and resistance to loosening, ensuring that fastened components remain secure. Additionally, the hexagonal head allows for easy installation and removal using standard tools, making it a convenient choice for maintenance and repair tasks. Compared to standard cap screws, the flange head design offers improved load distribution and reduced risk of damage to the fastened surface.

Installation Guidelines

Proper installation of the 4006861 Hexagon Flange Head Cap Screw is crucial for ensuring secure fastening. Begin by cleaning the mating surfaces to remove any debris or contaminants. Use a wrench or socket to tighten the screw, ensuring that it is drawn to the specified torque. It is important to follow the recommended torque specifications to avoid over-tightening, which can lead to damage, or under-tightening, which can compromise the fastening integrity. Periodically check the fastening to ensure it remains secure.

Troubleshooting Common Issues

Common issues with the 4006861 Hexagon Flange Head Cap Screw may include loosening or corrosion. If loosening is detected, re-torque the screw to the specified value. In cases of corrosion, inspect the screw and mating surfaces for signs of damage. If necessary, replace the screw and ensure that any corrosion is thoroughly cleaned from the mating surfaces to prevent recurrence.

Maintenance Tips

Regular maintenance of the 4006861 Hexagon Flange Head Cap Screw is important for ensuring its longevity and performance. Periodically inspect the screw for signs of wear, corrosion, or loosening. Re-torque the screw as needed to maintain secure fastening. Additionally, keep the mating surfaces clean and free of contaminants to prevent corrosion and ensure optimal performance.

Cummins Overview

Cummins Inc. is a leading manufacturer in the commercial truck industry, known for its commitment to quality and innovation. Founded in 1919, Cummins has a long history of producing reliable and high-performance components for commercial vehicles. The company’s dedication to excellence is evident in its wide range of products, including the 4006861 Hexagon Flange Head Cap Screw, which is designed to meet the rigorous demands of heavy-duty applications.

Hexagon Flange Head Cap Screw 4006861 in Cummins Engines

The Cummins Hexagon Flange Head Cap Screw part number 4006861 is a critical component in several of Cummins’ engine models. This part is designed to provide secure fastening in various applications within the engine assembly, ensuring that components remain tightly secured under operational stresses.

QSK45 CM500 and QSK60 CM500

In the QSK45 CM500 and QSK60 CM500 engines, the 4006861 screw is utilized in areas where a robust and reliable fastening solution is required. These engines are known for their high performance and durability, and the use of this specific screw ensures that critical engine components are held firmly in place, contributing to the overall reliability and longevity of the engine.

QSK50 CM2350 K108 and QSK95 CM2350 K113

For the QSK50 CM2350 K108 and QSK95 CM2350 K113 engines, the 4006861 screw is employed in similar applications. These engines are part of Cummins’ lineup of high-output, heavy-duty engines, and the screw’s design helps maintain the integrity of the engine’s structure under demanding conditions. The flange head design provides a larger bearing surface, which is essential for distributing loads more evenly and preventing stripping or damage to the screw.

QSK60 CM850 MCRS

In the QSK60 CM850 MCRS engine, the 4006861 screw is used in specific applications where high precision and strength are paramount. This engine is designed for applications requiring high power output and efficiency, and the screw’s role in securing various components ensures that the engine operates smoothly and reliably.

QSK78 CM500

The QSK78 CM500 engine also incorporates the 4006861 screw in its assembly. This engine is part of Cummins’ range of high-performance engines, and the screw’s use in this model highlights its importance in maintaining the structural integrity and operational efficiency of the engine.

Overall, the Cummins Hexagon Flange Head Cap Screw part number 4006861 is a vital component across multiple engine models, ensuring that critical parts remain securely fastened and the engine operates reliably under various conditions.

Hexagon Flange Head Cap Screw (Part 4006861) in Engine Systems

The Hexagon Flange Head Cap Screw, identified by part number 4006861, is integral to the assembly and operation of several key components within engine systems. Its design and functionality are tailored to ensure secure fastening and reliable performance under varying operational conditions.

Flexplate Assembly

In the context of the flexplate, the Hexagon Flange Head Cap Screw plays a significant role in attaching the flexplate to the crankshaft. This connection is vital for transmitting rotational force from the engine to the transmission. The screw’s flange head provides additional surface area, enhancing the stability and integrity of the connection. This is particularly important in automatic transmissions where the flexplate must withstand significant torque and vibration.

Flywheel Attachment

Similarly, in manual transmission systems, the Hexagon Flange Head Cap Screw is used to secure the flywheel to the crankshaft. The flywheel stores rotational energy and smooths out the power delivery from the engine’s combustion cycles. The screw ensures that the flywheel remains firmly attached, allowing for efficient energy transfer to the clutch and subsequently to the transmission. The flange head of the screw contributes to a more robust attachment, reducing the risk of loosening over time due to engine vibrations.

Operational Reliability

The use of Hexagon Flange Head Cap Screws in these applications underscores their importance in maintaining the structural integrity and operational reliability of engine components. Their design allows for easy installation and removal using standard hexagonal socket tools, facilitating maintenance and repair processes. The screws are engineered to handle the dynamic loads and stresses encountered in engine operation, ensuring long-term durability and performance.

Conclusion

The 4006861 Hexagon Flange Head Cap Screw is a critical component in the assembly and operation of commercial truck engines, ensuring secure fastening and reliable performance under demanding conditions. Its design, featuring a hexagonal head and flange, provides enhanced stability, resistance to loosening, and improved load distribution. Proper installation, regular maintenance, and timely troubleshooting are essential to maximize the screw’s effectiveness and longevity in heavy-duty applications.