3081278
Studded Hexagon Cap Screw
Cummins®

The Studded Hexagon Cap Screw, part number 3081278, manufactured by Cummins, is a specialized fastener designed for heavy-duty truck applications. This part plays a role in ensuring structural integrity and reliable performance in truck assemblies. Its design and material composition are tailored to withstand the demanding conditions encountered in heavy-duty trucking, contributing to the overall durability and efficiency of truck operations.

Basic Concepts of Studded Hexagon Cap Screws

Studded hexagon cap screws are fasteners that incorporate a threaded stud extending beyond the head of the screw. This design allows for the attachment of additional components, such as nuts or washers, providing a secure and robust connection. The hexagonal head facilitates easy torque application using a wrench or socket, ensuring precise fastening. Unlike non-studded cap screws, which have threads that terminate at the head, studded versions offer extended threading, enhancing their versatility and strength in mechanical assemblies ¹.

Purpose and Role in Truck Operation

Part 3081278 is specifically engineered to meet the rigorous demands of heavy-duty truck applications. It contributes to the assembly and maintenance of critical truck components by providing a secure and durable fastening solution. The screw’s design ensures that components remain firmly in place under significant stress and vibration, which are common in truck operations. This reliability is vital for maintaining the structural integrity and performance of truck assemblies ².

Key Features

The 3081278 Studded Hexagon Cap Screw features a robust material composition, typically including high-strength steel alloys, which enhance its durability and resistance to wear. The screw boasts a fine or coarse thread type, depending on the application requirements, allowing for versatile use in various truck components. Unique design elements, such as a corrosion-resistant coating, further contribute to its performance and longevity in demanding truck environments ³.

Benefits

Utilizing the 3081278 Studded Hexagon Cap Screw in truck maintenance and assembly offers several benefits. The screw’s high strength ensures secure fastening under heavy loads, while its corrosion resistance prolongs its lifespan in harsh operating conditions. The ease of installation, facilitated by its hexagonal head, allows for efficient assembly and maintenance processes. These benefits collectively contribute to enhanced truck performance and longevity.

Installation Guidelines

Proper installation of the 3081278 Studded Hexagon Cap Screw involves several steps to ensure secure and effective fastening. Begin by selecting the appropriate wrench or socket that fits the hexagonal head. Apply the screw to the designated location, ensuring that the threading aligns correctly with the mating component. Use a torque wrench to apply the specified torque, which varies depending on the application and material being fastened. Follow best practices, such as lubricating the threads to reduce friction and prevent galling, to ensure a secure connection.

Troubleshooting and Maintenance

Common issues with studded hexagon cap screws include loosening, corrosion, and damage. Loosening can occur due to vibration or insufficient torque during installation. To address this, re-torque the screw to the manufacturer’s specifications and consider using lock washers or thread lockers to prevent future loosening. Corrosion may be mitigated by applying a protective coating or selecting screws with inherent corrosion resistance. Regular inspection and maintenance, including cleaning and re-torquing as needed, help prolong the lifespan of the screws and ensure continued reliable performance.

Cummins: Manufacturer Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes diesel and natural gas engines, as well as related technologies. With a history spanning over a century, Cummins has established a reputation for producing reliable and high-performance components. The company’s expertise in diesel engine manufacturing and commitment to quality and innovation make it a trusted name in the automotive industry, particularly in the heavy-duty truck sector. Cummins’ components, including the 3081278 Studded Hexagon Cap Screw, are designed to meet the stringent demands of commercial vehicle applications, ensuring durability and efficiency.

Studded Hexagon Cap Screw Part 3081278 in Cummins Engines

The Studded Hexagon Cap Screw part 3081278, manufactured by Cummins, is a critical component in various Cummins engine models. This part is integral to the assembly and functionality of these engines, ensuring secure fastening and stability.

G855 and G855 CM558

In the G855 and G855 CM558 engines, the part 3081278 is utilized in several key areas where secure fastening is essential. These engines, known for their robust performance, rely on this screw to maintain the integrity of various components.

GTA855 CM558 (CM2358) G101

The GTA855 CM558 (CM2358) G101 engine also incorporates the Studded Hexagon Cap Screw part 3081278. This engine, designed for heavy-duty applications, uses this screw to ensure that critical parts remain tightly fastened under demanding conditions.

N14 Series

The N14 CELECT, N14 CELECT PLUS, N14 G, and N14 MECHANICAL engines all feature the part 3081278. This screw is essential in these engines for securing various components, ensuring that the engine operates smoothly and efficiently.

NH/NT 855

The NH/NT 855 engine utilizes the Studded Hexagon Cap Screw part 3081278 in several critical applications. This engine, known for its reliability, depends on this screw to maintain the structural integrity of its components.

QSN14 CM876 N103 and QSNT14 CM876 N102

Both the QSN14 CM876 N103 and QSNT14 CM876 N102 engines incorporate the part 3081278. This screw is vital in these engines for ensuring that all parts are securely fastened, contributing to the overall performance and longevity of the engine.

VTA903 CM2250 V105

The VTA903 CM2250 V105 engine also uses the Studded Hexagon Cap Screw part 3081278. This screw is crucial in this engine for maintaining the secure attachment of various components, ensuring the engine operates reliably.

Role of Part 3081278 Studded Hexagon Cap Screw in Engine Systems

The Part 3081278 Studded Hexagon Cap Screw is integral to the assembly and functionality of various engine components. It is utilized in securing and maintaining the integrity of several key parts within the engine system.

Base Parts and Cylinder Short Blocks

In the assembly of base parts and cylinder short blocks such as the NTC-350 and NTC-400, the 3081278 screw ensures that components are tightly fastened. This is essential for maintaining structural stability and preventing any misalignment that could lead to engine inefficiencies or failures.

Breather Assembly and Tubes

The breather assembly tube and the breather tube and mounting rely on the 3081278 screw to secure the tubes to the engine block. Proper sealing and attachment are vital for the effective ventilation of the crankcase, which helps in maintaining optimal pressure levels and reducing contaminants within the engine.

Cam Follower and Camshaft Components

For components like the cam follower, cam mounting box, and EBM: Follower, Cam, the 3081278 screw plays a significant role in ensuring that these parts are correctly positioned and secured. This is important for the precise operation of the camshaft, which directly influences the engine’s timing and performance.

Crankcase Breather Arrangement

In the crankcase breather arrangement, the screw is used to fasten various elements that help in managing the ventilation of the crankcase. This is crucial for maintaining the engine’s internal pressure and ensuring that any blow-by gases are effectively vented.

Housing and Mounting Components

Components such as the housing mounting, main bearing shell, and MTG, Cam FWL Housing require the 3081278 screw for secure attachment. These parts are fundamental to the engine’s structural framework and operational efficiency.

Electrical and Performance Parts

The screw is also employed in the assembly of electrical starting accessories and performance parts. Secure fastening of these components ensures reliable operation and enhances the overall performance of the engine.

Short Block and Engine Kits

In short block engine kits and short block assemblies, the 3081278 screw is used extensively to fasten various sub-components. This ensures that the short block is robust and ready for integration into the complete engine system.

Wiring Harness Mounting Kit

Finally, the wiring harness mounting kit utilizes the 3081278 screw to secure the electrical components in place. This is essential for maintaining the integrity of the electrical system and ensuring that all connections are secure and reliable.

Conclusion

Overall, the Part 3081278 Studded Hexagon Cap Screw is a versatile fastener that contributes to the secure assembly and reliable operation of numerous engine components. Its robust design, high-strength material, and corrosion resistance make it an essential component in heavy-duty truck and engine applications.