118977
Hexagon Head Cap Screw
Cummins®

The Hexagon Head Cap Screw is a fundamental component in the realm of commercial trucks, providing reliable fastening solutions that are vital for the integrity and performance of these vehicles. Manufactured by Cummins, a renowned name in the industry, the Hexagon Head Cap Screw part number 118977 is specifically designed for heavy-duty truck applications. This part plays a significant role in ensuring the structural and mechanical stability of commercial trucks, contributing to their overall efficiency and durability ¹.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is characterized by its hexagonal head, which allows for efficient torque application using a wrench or socket. This design ensures a secure fit and reduces the risk of cam-out during tightening. Typically made from materials such as carbon steel, alloy steel, or stainless steel, these screws are manufactured through a process that includes threading and heat treatment to enhance their strength and durability. The choice of material and the precision of the manufacturing process are critical factors that influence the screw’s performance in various applications ².

Purpose of the 118977 Hexagon Head Cap Screw in Truck Operations

The 118977 Hexagon Head Cap Screw is integral to the operation and maintenance of commercial trucks. It is commonly used in areas where strong, durable fastening is required, such as in the attachment of body panels, engine components, and chassis parts. Its role in these applications is to provide a secure connection that can withstand the rigors of heavy-duty use, including significant loads and environmental stresses ³.

Key Features of the 118977 Hexagon Head Cap Screw

The 118977 Hexagon Head Cap Screw boasts several features that enhance its performance in heavy-duty applications. Its hexagonal head design allows for easy and efficient tightening, while its threading is engineered to provide a strong, secure hold. Additionally, the screw may feature unique attributes such as a corrosion-resistant coating or specialized threading patterns that further improve its reliability and longevity in demanding environments ⁴.

Benefits of Using the 118977 Hexagon Head Cap Screw

Utilizing the 118977 Hexagon Head Cap Screw offers several advantages. These include improved fastening strength, which is crucial for maintaining the structural integrity of truck components. The screw’s design also contributes to resistance against loosening, ensuring that connections remain secure over time. Furthermore, its durability under heavy loads and varying environmental conditions makes it a reliable choice for commercial truck applications ¹.

Installation and Usage Guidelines

Proper installation of the 118977 Hexagon Head Cap Screw is key to achieving a secure and lasting fastening solution. It is recommended to follow torque specifications provided by the manufacturer to ensure the screw is tightened to the correct level without over-tightening, which could lead to damage. Using the appropriate tools, such as a torque wrench, is also advised to maintain the integrity of the screw and the components it is fastening ².

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws can include loosening over time or corrosion in harsh environments. Regular inspection and maintenance are recommended to identify and address these issues promptly. Maintenance tips include checking for signs of wear or corrosion, ensuring that screws are tightened to the correct torque, and replacing screws that show significant wear or damage to prevent failure ³.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and related technologies. With a rich history in the commercial truck industry, Cummins is committed to quality and innovation, providing components that meet the demanding requirements of heavy-duty applications. Their dedication to excellence is evident in the design and manufacturing of parts like the 118977 Hexagon Head Cap Screw, ensuring reliability and performance in commercial truck operations ⁴.

Cummins Hexagon Head Cap Screw 118977 in Engine Applications

The Cummins Hexagon Head Cap Screw part number 118977 is a versatile component that finds applications across various Cummins engine models. This screw is designed to provide robust fastening solutions, ensuring secure connections in critical engine assemblies. Here is a detailed look at how this part integrates with different Cummins engines:

G855 CM558 and KTA19GC CM558 Engines

The G855 CM558 and KTA19GC CM558 engines utilize the 118977 screw in several key areas. These engines, known for their reliability and power, require precise fastening to maintain structural integrity and operational efficiency. The screw is often used in mounting and securing various engine components, ensuring that parts remain firmly in place under operational stresses.

K19 and K50 Engines

In the K19 and K50 engines, the 118977 screw plays a crucial role in the assembly of engine blocks and related components. These engines are designed for durability and performance, and the use of high-quality screws like the 118977 helps maintain the integrity of the engine’s internal and external structures.

N14 G Engine

The N14 G engine, a staple in many heavy-duty applications, incorporates the 118977 screw in its assembly. This engine is known for its robust performance and longevity, and the use of reliable fastening components is essential. The screw is used in various mounting and securing tasks, ensuring that the engine’s components are held together securely.

NH/NT 855 Engines

For the NH/NT 855 engines, the 118977 screw is utilized in several critical fastening applications. These engines are designed for high-performance and reliability, and the use of precision screws like the 118977 helps maintain the structural integrity of the engine.

QSK19 CM850 MCRS, QSK50 CM2150 K107, QSK50 CM2150 MCRS, and QSK50 CM2350 K108 Engines

The QSK19 CM850 MCRS, QSK50 CM2150 K107, QSK50 CM2150 MCRS, and QSK50 CM2350 K108 engines are part of Cummins’ advanced engine lineup. These engines are designed for high performance and efficiency, and the 118977 screw is used in various critical fastening applications. Its use ensures that the engine components are securely fastened, contributing to the overall reliability and durability of the engines.

QSK60G Engine

The QSK60G engine, known for its power and efficiency, also incorporates the 118977 screw in its assembly. This engine is designed for demanding applications, and the use of high-quality screws is essential to maintain the integrity of the engine’s components under operational stresses.

Role of Part 118977 Hexagon Head Cap Screw in Engine Systems

The Part 118977 Hexagon Head Cap Screw is integral to the assembly and functionality of various engine components. It provides secure fastening, ensuring the stability and integrity of the engine system. Below are the specific applications of this screw in different components:

Adjusting Link Mounting

The Hexagon Head Cap Screw is used to firmly attach the adjusting link to its mounting points. This ensures precise adjustments and maintains the alignment of engine components.

Aftercooler and Aftercooler Bracket

In the aftercooler system, this screw secures the aftercooler to its bracket, facilitating efficient heat exchange and maintaining the structural integrity of the aftercooling process.

Aftercooler Cover

The screw plays a role in attaching the aftercooler cover, ensuring a sealed environment for optimal cooling performance.

Air Intake Connection

It is employed in the air intake connection to secure the intake components, ensuring a stable and leak-free connection for efficient air flow into the engine.

Auxiliary Pump

The Hexagon Head Cap Screw is utilized in the mounting of the auxiliary pump, providing a robust attachment that ensures the pump operates without vibrations or misalignments.

Box Electrical Mounting

In electrical systems, this screw secures the electrical mounting box, ensuring that all electrical connections are stable and protected.

Bracket Instrument Mounting

It is used to attach instrument brackets, ensuring that gauges and sensors are securely mounted and accurately positioned for reliable readings.

Cover Gear Mounting

The screw is essential in mounting gear covers, providing a secure fit that protects internal gear components and ensures smooth operation.

Crankcase Breather

In the crankcase breather system, this screw secures the breather components, allowing for effective ventilation and pressure regulation within the crankcase.

Engine Instrument Panel

It is used to mount the engine instrument panel, ensuring that all instruments are securely attached and easily accessible for monitoring engine performance.

Fan Drive and Fan Pilot Spacer

The screw is employed in the fan drive and fan pilot spacer assembly, ensuring that the fan operates efficiently and without undue stress on the engine components.

Front Engine Support

In the front engine support structure, this screw provides a strong and stable attachment, crucial for maintaining the engine’s position and alignment.

Fuel Code and Fuel Filter

It secures the fuel code and fuel filter components, ensuring a stable and leak-free fuel delivery system.

Fuel Supply Plumbing

The screw is used in the fuel supply plumbing to ensure all connections are tight and secure, preventing leaks and ensuring consistent fuel flow.

Housing Lubricating Oil Cooler

In the lubricating oil cooler housing, this screw ensures that the cooler is securely mounted, facilitating efficient oil cooling.

Oil Pan, Oil Pan Adapter Mounting, Oil Pan Cover Mounting, and Oil Pan Mounting

It is extensively used in various oil pan components to ensure secure and stable mounting, protecting the oil pan and maintaining the integrity of the oil system.

Performance Parts

For performance-enhancing parts, this screw provides the necessary secure attachment, ensuring that these components function optimally under high-stress conditions.

Throttle Lever

The screw is used to mount the throttle lever, ensuring precise control and stable operation of the throttle mechanism.

Torque Converter Oil Cooler

Finally, in the torque converter oil cooler, this screw secures the cooler components, ensuring efficient cooling and stable operation of the torque converter.

Conclusion

The 118977 Hexagon Head Cap Screw by Cummins is a critical component in the assembly and maintenance of commercial trucks and various engine systems. Its robust design, reliable performance, and versatility make it an essential part for ensuring the structural integrity and operational efficiency of heavy-duty vehicles. Proper installation, regular maintenance, and understanding its applications across different engine models are key to maximizing the benefits of this Cummins part.