3081151
Twelve Point Cap Screw
Cummins®

The Twelve Point Cap Screw, identified by part number 3081151, is a component manufactured by Cummins, a prominent entity in the commercial truck industry. This screw is integral to the assembly and maintenance of commercial trucks, ensuring the secure fastening of various components. Cummins is recognized for its high-quality parts and extensive product range, making the 3081151 Twelve Point Cap Screw a dependable choice for truck operators and maintenance professionals.

Basic Concepts

A Twelve Point Cap Screw is a type of fastener characterized by its twelve-sided head, which provides a larger contact area compared to traditional hex screws. This design allows for more torque to be applied without the risk of rounding off the corners, a common issue with six-point screws. In mechanical assemblies, these screws are used to secure components that require a high degree of stability and resistance to loosening ¹.

Purpose and Role in Truck Operation

The 3081151 Twelve Point Cap Screw serves a specific purpose in commercial trucks by securing critical components and ensuring structural integrity. It is often used in applications where vibrations and dynamic loads are present, such as in engine mounts, transmission housings, and chassis components. By providing a secure and stable connection, this screw helps maintain the alignment and functionality of these parts, contributing to the overall performance and safety of the truck ².

Key Features

The 3081151 Twelve Point Cap Screw features a twelve-point design that enhances its performance and reliability. This design allows for better torque application and reduces the likelihood of cam-out, where the tool slips off the screw head. The screw is typically made from high-strength materials, such as alloy steel, which provides durability and resistance to corrosion. Additionally, it may have a coated finish to further protect against environmental factors and improve longevity.

Benefits

The advantages of using the 3081151 Twelve Point Cap Screw include improved torque application, which allows for tighter and more secure fastening. The twelve-point design also offers resistance to cam-out, ensuring that the screw remains engaged with the tool during installation and removal. Furthermore, the durable material composition and potential coated finish enhance the screw’s performance in heavy-duty applications, making it a reliable choice for commercial trucks.

Installation Guidelines

Proper installation of the 3081151 Twelve Point Cap Screw involves several best practices to ensure optimal performance. Begin by selecting the appropriate tool that matches the twelve-point design to avoid damage to the screw head. Apply a consistent and even torque to the screw, following the manufacturer’s specifications to prevent over-tightening or under-tightening. It is also important to ensure that the mating surfaces are clean and free of debris to achieve a secure connection. Avoid using excessive force, as this can lead to stripping or damage to the screw or the surrounding components.

Troubleshooting and Maintenance

Common issues with Twelve Point Cap Screws include loosening due to vibrations, corrosion, or improper installation. To diagnose these problems, inspect the screw and surrounding components for signs of wear, corrosion, or misalignment. Regular maintenance practices, such as periodic tightening and inspection, can help ensure the longevity and performance of the screw. Additionally, applying a thread locker or anti-seize compound during installation can prevent loosening and corrosion.

Safety Considerations

When working with Twelve Point Cap Screws, it is important to follow safety guidelines to protect both the operator and the equipment. Use the correct tools designed for twelve-point screws to avoid damage and ensure a secure fit. Adhere to torque specifications provided by the manufacturer to prevent over-tightening, which can lead to stripped threads or component failure. Personal protective equipment, such as gloves and safety glasses, should be worn to protect against injuries from sharp edges or flying debris during installation and removal.

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 high-quality, reliable components. The company’s product range includes engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of commercial transportation. Cummins’ commitment to innovation and customer satisfaction has made it a trusted name among truck operators and maintenance professionals.

Twelve Point Cap Screw 3081151 in Cummins Engines

The Twelve Point Cap Screw 3081151, manufactured by Cummins, is a critical component in several of their engine models. This part is designed to provide robust fastening capabilities, ensuring secure connections in various engine assemblies.

G855

In the G855 engine, the 3081151 screw is utilized in multiple applications, including securing engine mounts and other critical assemblies. Its twelve-point design allows for efficient torque application, which is essential for maintaining the integrity of the engine’s structural components.

N14 CELECT PLUS and N14 MECHANICAL

For both the N14 CELECT PLUS and N14 MECHANICAL engines, the 3081151 screw plays a pivotal role in the assembly of the engine’s internal and external components. Given the high-stress environments these engines operate in, the durability and strength of the screw are paramount. The twelve-point configuration ensures that the screw can withstand the rigors of continuous operation without loosening.

QSN14 CM876 N103 and QSNT14 CM876 N102

In the QSN14 CM876 N103 and QSNT14 CM876 N102 engines, the 3081151 screw is integral to the fastening of various engine parts, including those in the turbocharger system and other high-load-bearing areas. The screw’s design facilitates easy and secure installation, which is crucial for maintaining the performance and reliability of these engines.

Each of these engines benefits from the use of the 3081151 screw, which ensures that all fastened components remain securely in place, contributing to the overall durability and efficiency of the engine.

Role of Part 3081151 Twelve Point Cap Screw in Engine Systems

In engine systems, the part 3081151 Twelve Point Cap Screw is instrumental in securing various components, ensuring their stability and proper function.

Lever Assembly

Within the lever assembly, the Twelve Point Cap Screw is used to fasten the lever to its mounting bracket. This secure attachment is essential for the lever’s operation, as it transmits motion from the driver’s input to the corresponding mechanical action within the engine. The screw’s design allows for precise torque application, which is vital for maintaining the lever’s alignment and ensuring smooth, reliable operation.

Rocker Arm Mechanism

In the rocker arm mechanism, the Twelve Point Cap Screw plays a significant role in attaching the rocker arm to the valve stem and the camshaft. This connection is fundamental for the rocker arm’s function, which is to amplify the camshaft’s motion and open and close the engine’s valves at the correct times. The screw’s twelve-point head provides enhanced grip, reducing the risk of cam-out during tightening and ensuring that the rocker arm remains firmly in place under the high stresses and vibrations of engine operation.

Conclusion

The 3081151 Twelve Point Cap Screw is a vital component in the commercial truck industry, providing secure fastening capabilities that ensure the stability and functionality of critical engine components. Its twelve-point design enhances torque application and reduces the risk of cam-out, making it a reliable choice for heavy-duty applications. Proper installation, regular maintenance, and adherence to safety guidelines are essential to maximize the performance and longevity of this Cummins part.