2891937
Twelve Point Cap Screw
Cummins®

The Cummins Twelve Point Cap Screw, part number 2891937, is a specialized fastener designed for commercial truck applications. Cummins, a prominent name in the commercial truck industry, manufactures this part to meet the rigorous demands of heavy-duty truck operations. This screw plays a significant role in ensuring the structural integrity and operational efficiency of commercial trucks ¹.

Basic Concepts of Twelve Point Cap Screws

A twelve point cap screw is characterized by its hexagonal socket head, which provides a larger contact area compared to traditional hex-head screws. This design allows for higher torque application without the risk of cam-out, making it suitable for applications requiring secure fastening. In the automotive industry, twelve point cap screws are commonly used in engine components, chassis assemblies, and other critical areas where durability and reliability are paramount ².

Purpose and Role in Truck Operation

The Cummins Twelve Point Cap Screw, part number 2891937, is designed to secure various components within commercial trucks. Its role is to provide a robust and reliable fastening solution that can withstand the vibrations and stresses encountered during truck operation. By ensuring that critical components remain securely fastened, this screw contributes to the overall functionality and safety of the vehicle ³.

Key Features

The Cummins Twelve Point Cap Screw, part number 2891937, features a precision-machined twelve point socket head, which allows for efficient torque application and reduces the likelihood of stripping. It is constructed from high-strength alloy steel, offering excellent resistance to corrosion and wear. The screw’s design includes a full thread, which enhances its holding power, and a black oxide finish that provides additional protection against environmental factors ⁴.

Benefits

The benefits of using the Cummins Twelve Point Cap Screw, part number 2891937, include improved torque application due to its twelve point design, which minimizes the risk of cam-out during tightening. Its resistance to loosening ensures that fastened components remain secure under dynamic conditions. Additionally, the screw’s enhanced structural integrity contributes to the longevity and reliability of the truck’s components.

Installation and Usage Guidelines

Proper installation of the Cummins Twelve Point Cap Screw, part number 2891937, involves ensuring that the mating surfaces are clean and free of debris. The screw should be tightened to the manufacturer’s specified torque settings to achieve optimal performance. It is recommended to use a torque wrench to ensure accurate tightening. Following these guidelines will help maintain the screw’s integrity and the overall performance of the truck.

Troubleshooting and Maintenance

Common issues with the Cummins Twelve Point Cap Screw, part number 2891937, may include loosening due to vibrations or corrosion. Regular inspections should be conducted to ensure that all screws are tightened to the proper specifications. If corrosion is detected, the affected areas should be cleaned, and the screw may need to be replaced to maintain structural integrity. Proper maintenance practices will help ensure the longevity and reliability of the screw.

Safety Considerations

When working with the Cummins Twelve Point Cap Screw, part number 2891937, it is important to follow safety protocols. This includes wearing appropriate personal protective equipment (PPE) such as gloves and safety glasses. The screw should be handled carefully to avoid injury, and any waste or discarded parts should be disposed of according to local regulations. Proper storage in a dry, secure location will help maintain the screw’s condition.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing reliable and high-performance components. Their product offerings include engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of commercial applications.

Twelve Point Cap Screw in Cummins Engines

The Cummins Twelve Point Cap Screw, part number 2891937, is a critical component in various Cummins engine models. This screw is designed to provide robust fastening solutions, ensuring secure connections in high-stress environments. Its application spans across several engine series, including the ISM CM570, ISM CM570/870, M11 CELECT, M11 CELECT PLUS, M11 MECHANICAL, and QSM11 CM570.

In the ISM CM570 and ISM CM570/870 engines, the Cummins Twelve Point Cap Screw is utilized in multiple assemblies to maintain structural integrity. These engines, known for their reliability and performance, benefit from the enhanced grip and load-bearing capabilities of the twelve-point design, which reduces the likelihood of rounding off the fastener head.

For the M11 series engines, including the M11 CELECT, M11 CELECT PLUS, and M11 MECHANICAL, the Cummins Twelve Point Cap Screw is integral to both internal and external components. The M11 CELECT and M11 CELECT PLUS engines, equipped with advanced electronic controls, rely on this screw for precise assembly and disassembly of various parts, ensuring optimal engine performance and longevity.

Similarly, the QSM11 CM570 engine incorporates the Cummins Twelve Point Cap Screw in its design. This engine, known for its versatility and efficiency, uses the screw in critical applications where high torque and stability are essential. The screw’s design allows for easier and more secure fastening, which is crucial for maintaining the engine’s operational standards.

Overall, the Cummins Twelve Point Cap Screw is a vital component across these Cummins engine models, providing the necessary strength and reliability for various fastening applications.

Role of Part 2891937 Twelve Point Cap Screw in Engine Systems

The Cummins Twelve Point Cap Screw, part number 2891937, is integral to the assembly and functionality of various engine components. Its design and specifications make it suitable for applications requiring secure fastening and resistance to vibration and torque.

Bracket Assembly

In the context of engine brackets, the Cummins Twelve Point Cap Screw ensures that the bracket is firmly attached to the engine block or chassis. This secure attachment is essential for maintaining the structural integrity of the engine, especially under the dynamic conditions of operation. The screw’s twelve-point design allows for greater torque application without the risk of cam-out, which is vital for the repeated tightening and loosening required during maintenance.

Lifting Mechanisms

For lifting mechanisms within engine systems, the Cummins Twelve Point Cap Screw plays a significant role in securing components that are subject to substantial loads. Whether it’s part of a lifting bracket or a support structure, the screw’s robust design ensures that the lifting equipment remains stable and secure, facilitating safe and efficient engine handling during transportation or installation.

Mounting Systems

When it comes to mounting various engine components, such as sensors, fuel injectors, or auxiliary systems, the Cummins Twelve Point Cap Screw provides a reliable fastening solution. Its ability to withstand high torque and resist loosening over time ensures that mounted components remain in their designated positions, contributing to the overall stability and performance of the engine.

Starting Motor Attachment

The starting motor, a key component in the engine’s ignition system, relies on secure fastening to function correctly. The Cummins Twelve Point Cap Screw is often used to attach the starting motor to the engine block. This secure attachment is essential for transmitting the necessary torque from the starter to the flywheel, ensuring reliable engine starts. The screw’s design minimizes the risk of failure under the high stresses encountered during engine start-up.

Conclusion

In summary, the Cummins Twelve Point Cap Screw, part number 2891937, is a versatile and reliable fastening solution across various engine components. Its application in brackets, lifting mechanisms, mounting systems, and starting motor attachments underscores its importance in maintaining the structural integrity and operational efficiency of engine systems.