3882922
Twelve Point Cap Screw
Cummins®

Introduction

The Twelve Point Cap Screw Part #3882922, manufactured by Cummins, is a specialized fastener designed for use in commercial trucks. This part ensures the integrity and functionality of various components under significant stress and vibration.

Basic Concepts of Twelve Point Cap Screws

A twelve point cap screw features a hexagonal socket head, providing a larger contact area compared to traditional hex-head screws ¹. This design allows for more torque to be applied without rounding off the head, making it suitable for high-stress applications. It also offers enhanced resistance to cam-out, reducing the risk of the tool slipping out of the fastener head during tightening or loosening.

Purpose and Role in Truck Operation

This Cummins part is utilized in commercial trucks to secure critical components subject to significant stress and vibration. It provides a reliable and durable connection between parts, ensuring they remain firmly in place under operating conditions. This screw is typically used in applications requiring high torque, such as in engine mounts, transmission components, and chassis assemblies.

Key Features

The Twelve Point Cap Screw Part #3882922 features a robust twelve-sided socket head, enhancing its ability to withstand high torque without damage. It is made from high-strength materials, typically alloy steel, which provides excellent resistance to wear and corrosion. The screw’s design includes a full thread, maximizing engagement with the mating part and contributing to its overall strength and durability.

Benefits

The use of this part offers several advantages in heavy-duty applications. Its design allows for improved torque application, ensuring components are securely fastened. The resistance to cam-out reduces the risk of the screw head rounding off, which can lead to loosening over time. Additionally, the material composition and design contribute to the screw’s longevity, making it a reliable choice for commercial truck operations.

Installation and Usage Guidelines

Proper installation of the Twelve Point Cap Screw Part #3882922 is crucial for ensuring a secure fit and maximizing its performance. It is recommended to use a torque wrench to apply the specified torque, ensuring the screw is tightened to the manufacturer’s recommendations without over-tightening. Best practices include cleaning the mating surfaces before installation to remove any debris that could affect the screw’s grip, and using a thread lubricant to facilitate installation and reduce the risk of galling.

Troubleshooting and Maintenance

Common issues with twelve point cap screws include loosening due to vibration or insufficient torque, and corrosion in harsh environments. Regular inspection and maintenance can help identify these issues early. If loosening is detected, the screw should be re-tightened to the specified torque. In cases of corrosion, the affected area should be cleaned, and a corrosion-resistant coating or lubricant may be applied to prevent further degradation.

Manufacturer - Cummins

Cummins is a renowned manufacturer in the commercial truck industry, known for its commitment to quality and innovation. With a history of producing reliable and high-performance components, Cummins has established a strong reputation among truck operators and maintenance professionals. The company’s focus on research and development ensures that its products, including the Twelve Point Cap Screw Part #3882922, meet the demanding requirements of commercial truck applications.

Compatibility with Cummins Engines

This part is compatible with various Cummins engine models, including the ISM, ISX, L10, M11, QSM11, QSX15, and X15 series. It is used in several key areas of these engines to ensure components are securely fastened, maintaining the integrity of the engine’s structure and function.

Role in Engine Systems

The Twelve Point Cap Screw plays a significant role in the assembly and maintenance of various engine components. In the cylinder block, it secures critical components such as the main bearing caps, which support the crankshaft. Within the engine block, it is used to fasten components like the oil pan, valve covers, and timing chain covers. Additionally, it secures cylinder head bolts, ensuring the cylinder head remains firmly attached to the engine block, maintaining proper compression and sealing.

Conclusion

The Twelve Point Cap Screw Part #3882922 by Cummins is a critical component in commercial truck engines, providing secure fastening in high-stress applications. Its robust design, high-strength materials, and resistance to cam-out make it a reliable choice for maintaining the structural integrity and operational reliability of engine systems.