137872
Hexagon Head Cap Screw
Cummins®

The 137872 Hexagon Head Cap Screw, manufactured by Cummins, is a specialized fastener designed for use in commercial trucks. This screw plays a significant role in the assembly and maintenance of various truck components, ensuring secure and reliable fastening under demanding conditions. Cummins, a well-regarded manufacturer in the automotive industry, is known for producing high-quality components that meet the rigorous standards of commercial vehicle applications.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of fastener characterized by its hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. The design of these screws facilitates secure fastening in a variety of applications. Typically, they are made from materials such as alloy steel or stainless steel, which offer high tensile strength and resistance to corrosion. The threading on these screws ensures a strong grip on the mating surface, contributing to the overall stability and durability of the fastened components ¹.

Purpose and Role in Truck Operation

This Cummins part is specifically designed to play a role in the operation of commercial trucks by securing critical components and assemblies. It contributes to the structural integrity of the truck by providing a reliable fastening solution that can withstand the vibrations, stresses, and environmental conditions encountered during regular operation. This screw is often used in applications where high strength and durability are required, such as in the attachment of engine components, chassis parts, and other heavy-duty assemblies ².

Key Features

The 137872 features a hexagonal head that allows for easy and efficient tightening using standard tools. Its threading is designed to provide a strong and secure grip on the mating surface, enhancing the overall fastening strength. Additionally, the screw may have unique attributes such as a corrosion-resistant coating or enhanced threading profile to improve performance and reliability in heavy-duty applications ³.

Benefits

This part offers several benefits, including improved fastening strength, resistance to loosening, and durability under demanding conditions. Its design and material properties contribute to a secure and long-lasting fastening solution, reducing the need for frequent maintenance or replacement. The screw’s ability to withstand vibrations and environmental factors makes it well-suited for use in commercial trucks, where reliability and performance are paramount ⁴.

Installation and Usage

Proper installation of this part is important to ensure secure and effective fastening. Recommended torque settings should be followed to achieve the desired clamping force without over-tightening, which could lead to damage or failure. Best practices for installation include using the appropriate tools and ensuring that the mating surfaces are clean and free of debris to promote a strong and lasting connection.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws, such as loosening or corrosion, can often be addressed through proper maintenance and care. Regular inspection of the screws and their fastening points can help identify potential problems before they lead to failure. Maintenance tips include cleaning the screws and mating surfaces, applying a suitable lubricant or anti-seize compound to prevent corrosion, and replacing screws that show signs of wear or damage.

Cummins Overview

Cummins is a reputable manufacturer known for its high-quality automotive components and commitment to innovation and excellence in the industry. The company’s products, including the 137872, are designed to meet the demanding requirements of commercial vehicle applications, providing reliable performance and durability. Cummins’ reputation for quality and innovation makes its components a popular choice among fleet operators and maintenance professionals.

Cummins Part 137872 Hexagon Head Cap Screw in Engine Applications

The Cummins part number 137872, a Hexagon Head Cap Screw, is a critical component in various engine models. This screw is integral to the assembly and maintenance of several Cummins engines, ensuring secure connections and reliable performance.

K19 and K38 Engines

In the K19 and K38 engines, the 137872 is used in several key areas. It secures components such as the cylinder head to the engine block, ensuring a tight seal and preventing leaks. Additionally, it is used in the assembly of the fuel injection system, where precision and reliability are paramount.

K50 Engine

The K50 engine also relies on the 137872 for various applications. This screw is used in the mounting of the turbocharger, ensuring that the turbocharger is securely attached to the engine. It is also used in the assembly of the exhaust system, where it helps to maintain the structural integrity of the engine.

QSK19 CM2350 Engines

For the QSK19 CM2350 engines, the 137872 is used in multiple areas. It is employed in the assembly of the cylinder head, securing it to the engine block. Additionally, it is used in the mounting of the fuel injection pump, ensuring that the pump is securely attached and operates correctly.

QSK19 CM2350 K105, K114, and K144G Engines

The QSK19 CM2350 K105, K114, and K144G engines also utilize the 137872. This screw is used in the assembly of the cylinder head, ensuring a secure and leak-proof connection. It is also used in the mounting of the turbocharger and the fuel injection system, where precision and reliability are essential.

QSK19 CM500 and QSK19 CM850 MCRS Engines

In the QSK19 CM500 and QSK19 CM850 MCRS engines, the 137872 is used in the assembly of the cylinder head and the mounting of the turbocharger. This screw ensures that these critical components are securely attached, contributing to the overall performance and reliability of the engine.

QSK50 CM2150 MCRS Engine

The QSK50 CM2150 MCRS engine also employs the 137872. It is used in the assembly of the cylinder head and the mounting of the turbocharger. This screw ensures that these components are securely attached, contributing to the engine’s performance and reliability.

Role of Part 137872 Hexagon Head Cap Screw in Engine Systems

Part 137872, the Hexagon Head Cap Screw, 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.

Intake Manifold and Air Intake Manifold

In the intake manifold and air intake manifold, the Hexagon Head Cap Screw is used to fasten the manifold to the engine block. This securement is vital for maintaining the airtight seal necessary for optimal airflow into the engine cylinders. Additionally, it plays a role in the air intake manifold mounting, ensuring that the manifold remains firmly attached under varying engine operating conditions.

Aftercooler Systems

For the aftercooler core, aftercooler plumbing, and both the front and rear aftercooler kits, the Hexagon Head Cap Screw is employed to secure the aftercooler to its mounting housing. This ensures that the aftercooler remains stable and efficiently cools the charge air before it enters the engine, contributing to better performance and longevity of the engine components.

Charge Air Bypass Plumbing and Turbocharger Arrangement

In charge air bypass plumbing and turbocharger arrangements, the screw is used to secure various connections and components. This includes fastening the bypass valve and ensuring that the turbocharger is correctly mounted and aligned, which is essential for maintaining the efficiency of the turbocharging system.

Oil and Fuel Systems

The Hexagon Head Cap Screw is also pivotal in the oil and fuel systems. It is used in the left and right bank oil control connections, lubricating oil supply tube, and oil supply tube mounting. These applications ensure that oil flows smoothly and under the correct pressure to all moving parts, reducing friction and wear. Similarly, in the fuel transfer right-hand engine kit and fuel control module, the screw secures components, ensuring reliable fuel delivery to the engine.

Electronic and Engine Control Modules

In the electronic control module wiring harness and engine control module, the screw is used to secure wiring harnesses and modules in place. This ensures that electrical connections remain intact and that the engine control system operates without interruption, which is essential for the engine’s electronic management system.

Radiator and Plumbing Connections

For the radiator plumbing connection, the Hexagon Head Cap Screw secures the radiator to the engine bay and ensures that coolant flows efficiently through the system. This is vital for maintaining the engine’s operating temperature within safe limits.

Performance and Service Kits

In performance parts and service kits, the screw is used across various applications to secure enhancements or replacements, ensuring that these modifications are safely and effectively integrated into the engine system.

Conclusion

The 137872 Hexagon Head Cap Screw plays a multifaceted role in engine systems, contributing to the securement, stability, and efficiency of a wide range of components. Its design, material properties, and applications make it a critical component in the assembly and maintenance of commercial truck engines, ensuring reliable performance and durability under demanding conditions.