128055
Hexagon Head Cap Screw
Cummins®

The Cummins 128055 Hexagon Head Cap Screw is a specialized fastener designed for use in commercial trucks. Its purpose is to provide secure and reliable fastening in various applications within the truck’s structure and components. This screw is particularly valued for its durability and resistance to loosening under vibration, making it suitable for the demanding conditions encountered in heavy-duty truck operations.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of bolt characterized by its hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. The screw is threaded along a portion of its length, enabling it to be driven into materials to hold parts together securely. The design of the hexagon head provides a larger contact area compared to other head types, enhancing the screw’s resistance to rounding off during use ¹.

Purpose and Role in Truck Operation

This Cummins part plays a significant role in the operation and maintenance of commercial trucks. It is commonly used in applications where high strength and resistance to vibration are required, such as in the fastening of engine components, chassis parts, and other critical assemblies. Its application areas within the truck include securing engine mounts, attaching body panels, and fastening various brackets and supports ².

Key Features

The 128055 features a robust design that includes a high-strength material composition, typically alloy steel, which provides excellent tensile strength and durability. The screw has a coarse thread type, which allows for quick installation and removal, and its hexagon head design ensures secure and efficient tightening. These features contribute to the screw’s functionality and longevity in demanding truck applications ³.

Benefits

Using this part offers several benefits. Its high-strength material and design provide enhanced durability, making it resistant to wear and tear. The screw’s resistance to vibration loosening ensures that fastened parts remain securely attached, even under the dynamic conditions of truck operation. Additionally, the hexagon head design allows for ease of installation and removal, facilitating maintenance and repair processes.

Installation Guidelines

Proper installation of this part involves several steps. First, ensure that the mating surfaces are clean and free of debris. Use a wrench or socket that fits the hexagon head to begin tightening the screw. Apply torque gradually to avoid cross-threading. The recommended torque specifications should be followed to achieve the proper clamping force without over-tightening, which could damage the screw or the fastened parts. Use a torque wrench for accurate torque application.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws include loosening due to vibration and corrosion. To address these issues, regular inspections should be conducted to check for any signs of loosening or corrosion. If loosening is detected, re-tighten the screw to the specified torque. To prevent corrosion, apply a suitable anti-seize compound during installation. Maintenance tips include keeping the screws and surrounding areas clean and dry, and replacing screws that show signs of wear or damage.

Safety Considerations

When working with Hexagon Head Cap Screws, it is important to follow safety practices to prevent accidents. Use the appropriate tools and ensure they are in good condition to avoid slippage or tool failure. Wear personal protective equipment, such as gloves and safety glasses, to protect against injuries. Store screws in a dry, organized environment to prevent rust and ensure they are easily accessible when needed. Adhere to all safety standards and guidelines when handling and installing fasteners.

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 its commitment to quality and innovation. The company’s focus on developing reliable and high-performance components, such as the Cummins 128055 Hexagon Head Cap Screw, underscores its dedication to enhancing the efficiency and durability of commercial trucks.

Role of Part 128055 Hexagon Head Cap Screw in Engine Systems

This part is integral to the assembly and securement of various components within engine systems. Its application spans across multiple critical areas, ensuring the structural integrity and operational efficiency of the engine.

Crossmember

In the context of the crossmember, this part is utilized to fasten the crossmember to the chassis. This connection is vital for distributing loads evenly across the vehicle’s frame, enhancing stability and safety. The screw’s hexagonal head allows for secure tightening, minimizing the risk of loosening under dynamic driving conditions.

Engine and Gear Mounting P Bracket

For the engine and gear mounting P bracket, this part plays a significant role in attaching the bracket to the engine block and transmission housing. This securement is essential for maintaining the alignment and positioning of the engine and gearbox, which directly impacts the vehicle’s performance and durability. The screw’s design ensures a strong and reliable connection, capable of withstanding the vibrations and stresses generated during operation.

Engine Mounting

In engine mounting applications, this part is employed to fasten the engine to its mounting points on the vehicle’s frame. This connection is fundamental for absorbing engine vibrations and ensuring smooth operation. The screw’s robust construction and precise fit contribute to the overall stability and longevity of the engine mounting system.

Generator Mounting

For generator mounting, this part is used to secure the generator to its designated mounting bracket. This attachment is crucial for maintaining the generator’s position and alignment, which is necessary for efficient power generation and distribution. The screw’s reliability ensures that the generator remains firmly in place, even under varying load conditions.

Main Mounting Generator

In the main mounting of the generator, this part is instrumental in connecting the generator to the main mounting structure. This securement is essential for supporting the generator’s weight and ensuring its stable operation. The screw’s strength and durability are paramount in maintaining the generator’s performance and reliability over time.

Conclusion

Overall, the 128055 Hexagon Head Cap Screw is a versatile and essential component in the assembly and securement of various engine system components. Its reliable performance and robust design make it a preferred choice for ensuring the structural integrity and operational efficiency of engine systems.