4983804
Hexagon Head Cap Screw
Cummins®

The 4983804 Twelve Point Cap Screw is a specialized fastener produced by Cummins, a leading manufacturer in the commercial truck industry. This cap screw is designed for use in various applications within commercial trucks, where it contributes to the secure assembly of components and the overall structural integrity of the vehicle.

Basic Concepts of Twelve Point Cap Screws

A twelve point cap screw is a type of fastener characterized by its hexagonal socket head, which provides a larger contact area compared to traditional six point screws. This design allows for more efficient torque application and reduces the risk of cam-out during tightening ¹. Twelve point cap screws are commonly used in mechanical applications where high torque and resistance to loosening are required.

Purpose of the 4983804 Twelve Point Cap Screw in Truck Operation

The 4983804 Twelve Point Cap Screw plays a role in the operation and maintenance of commercial trucks by securing various components. It is utilized in applications where strong, reliable fastening is necessary, such as in engine assemblies, transmission systems, and chassis structures. Its design ensures that critical parts remain firmly in place, contributing to the safe and efficient operation of the truck.

Key Features

The 4983804 Twelve Point Cap Screw features a robust design that includes a twelve-sided socket head, which enhances torque application and reduces the likelihood of stripping. It is manufactured from high-quality materials, ensuring durability and resistance to wear. The screw’s precise threading and hardened surface contribute to its performance and longevity in demanding truck applications.

Benefits

The 4983804 Twelve Point Cap Screw offers several benefits, including improved torque application due to its twelve-sided head, which allows for greater contact area and reduced cam-out. Its design also provides resistance to loosening, which is crucial in dynamic truck environments. Additionally, the screw enhances structural integrity in truck assemblies, ensuring that components remain securely fastened under various operating conditions.

Installation Guidelines

Proper installation of the 4983804 Twelve Point Cap Screw involves several steps to ensure optimal performance. Begin by cleaning the mating surfaces 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 recommendations. It is important to follow best practices, such as using the correct tools and avoiding over-tightening, to prevent damage to the screw or the surrounding components.

Troubleshooting and Maintenance

Common issues with the 4983804 Twelve Point Cap Screw may include corrosion or stripping. Regular inspection and maintenance can help prevent these problems. If corrosion is detected, clean the affected area and apply a suitable corrosion-resistant coating. In the case of stripping, replace the damaged screw with a new one to maintain the integrity of the assembly. Adhering to recommended maintenance schedules will help ensure the continued reliable operation of the screw.

Cummins: Manufacturer Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins has established a strong reputation in the commercial truck industry. The company’s extensive product range and commitment to excellence provide confidence in the quality and reliability of the 4983804 Twelve Point Cap Screw ².

Twelve Point Cap Screw 4983804 in Cummins Engines

The Twelve Point Cap Screw 4983804, manufactured by Cummins, is a critical component in several of their engine models. This part is integral to the assembly and maintenance of the following engines:

• QSB5.9 CM850
• QSB6.7 M CM2250
• QSC8.3 CM850 (CM2850)
• QSM11 CM570

In these engines, the Twelve Point Cap Screw 4983804 is utilized in various applications where secure fastening is essential. Its design, featuring twelve points, ensures a robust grip and stability, which is crucial for maintaining the integrity of engine components under operational stress.

For the QSB5.9 CM850 and QSB6.7 M CM2250, this screw is often employed in securing engine blocks and other structural components, ensuring that parts remain tightly fastened and aligned during operation.

In the QSC8.3 CM850 (CM2850) and QSM11 CM570, the screw’s role extends to fastening components that are subject to high torque and vibration, such as certain engine mounts and brackets. The screw’s design helps in maintaining the alignment and structural integrity of these parts, which is vital for the engine’s performance and longevity.

The use of the Twelve Point Cap Screw 4983804 across these engines underscores its importance in Cummins’ engineering approach, emphasizing reliability and durability in engine assembly.

Role of Part 4983804 Twelve Point Cap Screw in Various Engine Systems

Connection Systems

In connection systems, the part 4983804 Twelve Point Cap Screw is instrumental in securing various components together. Its design allows for a firm grip, ensuring that parts remain tightly connected under operational stress. This is particularly important in systems where vibrations and dynamic loads are common, as the screw’s twelve-point head provides enhanced resistance to cam-out, maintaining the integrity of the connection.

Exhaust Outlet Systems

When integrated into exhaust outlet systems, the Twelve Point Cap Screw plays a significant role in maintaining the structural integrity of the exhaust components. It is used to fasten flanges, brackets, and other mounting hardware, ensuring that the exhaust system remains securely attached to the engine and chassis. This secure attachment is vital for efficient exhaust flow and reducing the risk of leaks, which can lead to performance issues and increased emissions.

General System Applications

Across various engine systems, the Twelve Point Cap Screw is utilized in applications requiring robust fastening solutions. Whether securing engine covers, mounting sensors, or attaching ancillary components, its reliable performance ensures that parts remain in place under varying operational conditions. The screw’s design facilitates easy installation and removal, which is beneficial during maintenance procedures.

Marine Propulsion Systems

In marine propulsion systems, the Twelve Point Cap Screw is essential for withstanding the corrosive environment of saltwater. It is commonly used to fasten components such as engine mounts, propeller assemblies, and fuel system parts. The screw’s ability to provide a strong, corrosion-resistant connection is particularly valuable in marine applications, where the integrity of fastenings can significantly impact the reliability and safety of the propulsion system ³.

Conclusion

The 4983804 Twelve Point Cap Screw is a vital component in the assembly and maintenance of commercial trucks and engines, offering enhanced torque application, resistance to loosening, and structural integrity. Proper installation and maintenance are crucial to ensure its reliable operation in demanding environments.