4995194
Twelve Point Cap Screw
Cummins®

The Twelve Point Cap Screw, part number 4995194, manufactured by Cummins, is a specialized fastener designed for use in commercial trucks. Cummins, a well-established name in the commercial truck industry, produces this part to meet the demanding requirements of heavy-duty applications. This screw plays a significant role in ensuring the secure attachment of various components within the truck’s mechanical systems.

Basic Concepts of Twelve Point Cap Screws

A twelve point cap screw is a type of fastener characterized by its twelve-sided socket head, which provides a larger contact area compared to traditional hex-head screws. This design reduces the risk of cam-out during torque application, allowing for more precise and controlled fastening. Twelve point cap screws are commonly used in mechanical assemblies where high torque and secure fastening are required ¹.

Purpose and Role in Truck Operation

The Twelve Point Cap Screw, part number 4995194, is integral to the operation of commercial trucks. It is used to secure critical components, ensuring structural integrity and reliable performance. By providing a strong and stable connection, this screw helps maintain the alignment and functionality of various truck parts, contributing to overall vehicle safety and efficiency.

Key Features

The Twelve Point Cap Screw, part number 4995194, features a twelve-sided socket head, which offers enhanced grip and reduces the likelihood of stripping during installation. It is made from high-quality materials, typically a durable alloy, to withstand the rigors of heavy-duty use. The screw has a specific threading type designed for optimal engagement with mating components, ensuring a secure fit. Additionally, its design includes features that enhance performance and reliability in demanding applications.

Benefits

The Twelve Point Cap Screw, part number 4995194, offers several benefits. Its unique head design allows for improved torque application, reducing the risk of cam-out and ensuring a tighter, more secure fastening. The enhanced grip provided by the twelve-sided socket head contributes to a more reliable connection. Furthermore, the screw’s durable material composition and precise threading ensure long-lasting performance in heavy-duty environments.

Installation Considerations

Proper installation of the Twelve Point Cap Screw, part number 4995194, is crucial for ensuring secure and reliable fastening. It is recommended to use the appropriate torque specifications provided by the manufacturer to avoid over-tightening or under-tightening. Utilizing the correct tools, such as a torque wrench, will help achieve the desired torque values. Additionally, following best practices for installation, such as cleaning the mating surfaces and ensuring proper alignment, will contribute to a successful fastening process ².

Troubleshooting and Maintenance

Common issues that may arise with twelve point cap screws include loosening, corrosion, or damage. Regular inspection and maintenance can help identify and address these problems early. If loosening is detected, re-torquing the screw to the specified values may resolve the issue. Corrosion can be mitigated by applying a suitable anti-corrosive coating or lubricant. In cases of damage, replacing the screw with a new one is recommended to maintain structural integrity.

Cummins Overview

Cummins Inc. is a leading manufacturer in the commercial truck industry, known for its high-quality engines, powertrains, and related components. Founded in 1919, Cummins has a long history of innovation and excellence. The company’s product portfolio includes a wide range of engines, filtration systems, and aftermarket parts, all designed to meet the needs of heavy-duty applications. Cummins’ reputation for reliability and performance makes it a trusted choice for commercial truck operators and maintenance professionals.

Twelve Point Cap Screw Part 4995194 in Cummins Engines

The Twelve Point Cap Screw, part number 4995194, is a critical component in various Cummins engines, including the B3.3, QSB3.3 CM2150, and QSB3.3 CM2250 EC. This screw is integral to the assembly and maintenance of these engines, ensuring that various parts are securely fastened and properly aligned.

In the B3.3 engine, the 4995194 screw is used in several key areas, such as securing the cylinder head to the engine block, which is essential for maintaining the integrity of the combustion chamber and preventing leaks. Similarly, in the QSB3.3 CM2150 and QSB3.3 CM2250 EC engines, this screw plays a vital role in the assembly of the engine’s internal components, ensuring that all parts are held firmly in place under the high stresses and vibrations experienced during operation.

The use of a twelve-point design for the cap screw allows for better torque application and reduces the likelihood of rounding off the screw head, which is crucial for the longevity and reliability of the engine. This screw is typically made from high-strength materials to withstand the demanding conditions within the engine, including high temperatures and pressures.

By ensuring that the Twelve Point Cap Screw, part number 4995194, is correctly installed and maintained, technicians can help to prolong the life of these Cummins engines and ensure they operate efficiently and reliably.

Role of Part 4995194 Twelve Point Cap Screw in Engine Systems

In the intricate world of engine systems, the part 4995194 Twelve Point Cap Screw plays a significant role in ensuring the stability and integrity of various components.

Housing

The housing is a fundamental part of the engine, providing a secure enclosure for internal components. The Twelve Point Cap Screw, with its robust design, is utilized to fasten the housing securely. This ensures that the housing remains intact under the high stresses and vibrations typical in engine operations. The screw’s design allows for efficient torque application, minimizing the risk of stripping or loosening, which could lead to housing misalignment or failure.

Flywheel

The flywheel is another component where the Twelve Point Cap Screw demonstrates its importance. Attached to the engine’s crankshaft, the flywheel plays a vital role in storing rotational energy and smoothing out the power delivery. The Twelve Point Cap Screw is employed to secure the flywheel to the crankshaft, ensuring a solid connection that can withstand the dynamic forces at play. Its twelve-point design offers enhanced grip and resistance to cam-out, which is essential for maintaining the precise alignment and balance of the flywheel. This, in turn, contributes to the overall efficiency and reliability of the engine’s operation.

Conclusion

The Twelve Point Cap Screw, part number 4995194, is a critical component in the operation and maintenance of commercial trucks and Cummins engines. Its unique design, durable materials, and precise threading ensure secure and reliable fastening of critical components. Proper installation and maintenance of this screw are essential for the longevity and efficiency of the engine systems in which it is used.