3074632
Twelve Point Cap Screw
Cummins®

The Twelve Point Cap Screw, identified by part number 3074632, is a specialized fastener produced by Cummins, a renowned manufacturer in the automotive and heavy-duty truck industry. This screw is integral to the assembly and maintenance of heavy-duty trucks, ensuring secure fastening of various components. Its design and functionality are tailored to meet the demanding requirements of truck operations, providing reliable performance under strenuous conditions.

Basic Concepts of Twelve Point Cap Screws

A Twelve Point Cap Screw is a type of fastener characterized by its hexagonal socket head, which allows for increased torque application compared to traditional hex-head screws. This design reduces the likelihood of cam-out, where the driver slips out of the screw head during tightening. The twelve-point configuration provides a smoother engagement and disengagement, enhancing the efficiency and safety of the fastening process. These screws are typically used in applications requiring high torque and resistance to loosening ¹.

Purpose and Role in Truck Operation

This Cummins part plays a significant role in the operation and maintenance of heavy-duty trucks. It is utilized in various truck components where secure and durable fastening is required. This includes engine mounts, transmission housings, and chassis assemblies. By providing a robust connection, the screw helps maintain the structural integrity of these components, ensuring they function correctly under the heavy loads and dynamic conditions typical of truck operations.

Key Features

This part is crafted from high-strength materials, typically alloy steel, to withstand the rigors of heavy-duty applications. It features a coarse thread, which allows for quick and secure fastening. The screw’s design includes a domed head that distributes load more evenly and reduces the risk of damage to the fastened material. Additionally, the twelve-point socket head enhances torque application and reduces the chance of stripping or cam-out during installation.

Benefits

Using the 3074632 Twelve Point Cap Screw offers several advantages. Its design allows for improved torque application, ensuring that components are securely fastened without over-tightening. The resistance to loosening provided by the twelve-point head reduces the need for frequent re-tightening, saving time and labor. Furthermore, the screw’s high-strength material composition enhances the structural integrity of truck assemblies, contributing to their durability and reliability ².

Installation Considerations

Proper installation of this part is vital to ensure secure and effective fastening. Torque specifications should be followed closely to avoid over-tightening, which can damage the screw or the fastened material, or under-tightening, which can lead to loosening. Recommended tools include a torque wrench for precise application of torque and a socket driver that matches the screw’s twelve-point head. Best practices include cleaning the fastening area to remove any debris or corrosion that could affect the screw’s grip and ensuring that the screw is aligned correctly before tightening.

Troubleshooting and Maintenance

Common issues with Twelve Point Cap Screws include loosening over time due to vibration or thermal expansion and contraction. Regular inspection and re-tightening, as necessary, can help address this. In cases where a screw appears damaged or stripped, it should be replaced to maintain the integrity of the fastening. Maintenance tips include protecting the screw from corrosion by applying a suitable coating and ensuring that all mating surfaces are clean and free from contaminants.

Cummins: Manufacturer 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 reputation for quality, innovation, and reliability in the automotive industry. The company’s commitment to excellence is evident in its rigorous manufacturing processes and continuous investment in research and development. Cummins’ products, including the 3074632 Twelve Point Cap Screw, are designed to meet the high standards required for heavy-duty applications, ensuring performance, durability, and customer satisfaction.

Twelve Point Cap Screw 3074632 in Cummins Engines

The Twelve Point Cap Screw 3074632, manufactured by Cummins, is a critical component in several of their engine models. This screw is utilized in the K19, QSK19 CM2350, and QSK19 CM500 engines. It plays a vital role in securing various parts within these engines, ensuring structural integrity and operational efficiency.

In the K19 engine, the 3074632 screw is often used in applications where high strength and durability are required, such as in the engine’s mounting brackets or other critical assemblies. Its twelve-point design allows for better grip and torque application, which is essential for maintaining the engine’s alignment and stability under operational loads.

For the QSK19 CM2350 and QSK19 CM500 engines, the 3074632 screw is similarly employed in key structural components. These engines, known for their robust performance, benefit from the screw’s ability to withstand significant stress and vibration. The screw’s design ensures that it can maintain its fastening capabilities even in high-temperature and high-pressure environments typical of these engines.

In the QSK19 CM850 MCRS engine, the 3074632 screw is used in a variety of applications, including securing the engine’s internal components and ensuring the proper alignment of critical parts. Its use in this engine underscores its versatility and importance in maintaining the engine’s overall performance and longevity.

Overall, the Twelve Point Cap Screw 3074632 is a fundamental part in these Cummins engines, providing the necessary strength and reliability to keep the engines running smoothly and efficiently.

Part 3074632 Twelve Point Cap Screw Component Usage

The part 3074632 Twelve Point Cap Screw is integral to the secure assembly and operation of various engine components. Its role is significant in ensuring the stability and efficiency of the engine system.

Attachment

In the context of engine assembly, the Twelve Point Cap Screw is utilized for the secure attachment of various components. It provides a robust connection that can withstand the dynamic forces and vibrations inherent in engine operation.

Starting Motor Mounting

For the starting motor, the Twelve Point Cap Screw is employed to mount the motor securely to the engine block or housing. This ensures that the starting motor remains in the correct position and operates efficiently during engine start-up.

Flywheel Mounting Housing

When it comes to the flywheel mounting housing, the Twelve Point Cap Screw plays a key role in attaching the housing to the engine. This secure attachment is essential for the proper alignment and function of the flywheel, which is vital for the engine’s starting process and overall performance.

Mounting

In general mounting applications within the engine system, the Twelve Point Cap Screw is used to fasten components such as brackets, plates, and other structural elements. This ensures that these parts remain firmly in place, contributing to the engine’s structural integrity and operational stability.

Starting Motor

For the starting motor itself, the Twelve Point Cap Screw is often used in the internal assembly to secure components such as the motor’s housing to its base. This internal securing is just as important as the external mounting, as it ensures the motor’s components function cohesively.

Starter Mounting

Finally, in the starter mounting process, the Twelve Point Cap Screw is crucial for attaching the starter to the engine. This secure attachment is necessary for the starter to engage properly with the flywheel, ensuring a smooth and reliable engine start.

Conclusion

The 3074632 Twelve Point Cap Screw is a critical component in the assembly and maintenance of heavy-duty trucks and Cummins engines. Its design, featuring a twelve-point socket head and high-strength material composition, ensures secure fastening and resistance to loosening under strenuous conditions. Proper installation and maintenance of this part are essential to ensure the structural integrity and operational efficiency of truck and engine components. Cummins’ commitment to quality and innovation is reflected in the design and performance of this screw, making it a reliable choice for heavy-duty applications.