3098740
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flanged Head Cap Screw, identified by part number 3098740, is a specialized fastener produced by Cummins, a renowned manufacturer in the commercial truck industry. This screw is integral to the assembly and maintenance of various components within commercial trucks, ensuring secure and reliable fastening. Cummins, known for its commitment to quality and innovation, provides this component as part of its extensive range of high-performance truck parts.

Basic Concepts

Hexagon Flanged Head Cap Screws are designed with a hexagonal head and a flanged base, which provides a larger bearing surface and enhanced resistance to loosening. These screws are commonly used in the automotive industry for applications requiring strong, durable fastening solutions. The hexagonal shape allows for efficient torque application using standard tools, while the flanged head distributes load more evenly, reducing the risk of damage to the fastened material ¹.

Purpose and Role in Truck Operation

This Cummins part plays a specific role in the operation of commercial trucks by securing critical components that are subject to significant stress and vibration. Its design ensures that parts remain firmly attached, contributing to the overall stability and performance of the vehicle. This screw is often used in applications where both high strength and resistance to loosening are required, such as in engine mounts, chassis components, and various structural assemblies ².

Key Features

The 3098740 features a hexagonal head that allows for easy and precise tool engagement, facilitating efficient installation and removal. The flanged head design provides an increased bearing surface, which helps distribute the load more evenly and reduces the likelihood of the screw loosening over time. Additionally, the cap screw functionality ensures a secure and tight fit, enhancing the screw’s performance and reliability in demanding applications.

Benefits

Using this part in commercial trucks offers several benefits. Its design provides improved fastening strength, making it suitable for applications where high tensile strength is required. The resistance to loosening ensures that components remain securely fastened, even under vibrations and dynamic loads. Furthermore, the ease of installation and removal simplifies maintenance procedures, allowing for quick and efficient servicing.

Installation Process

Proper installation of the 3098740 involves several steps to ensure a secure and reliable fastening. Begin by cleaning the installation surface to remove any debris or contaminants. Use a torque wrench to apply the specified torque, ensuring that the screw is tightened to the manufacturer’s recommended settings. It is important to follow best practices, such as using the correct tool for the hexagonal head and avoiding over-tightening, which can lead to damage or stripping of the screw.

Troubleshooting and Maintenance

Common issues with the 3098740 may include loosening over time or damage due to corrosion. To address these issues, regular inspection of the screws is recommended to identify any signs of wear or loosening. If loosening is detected, re-tighten the screw to the specified torque. Corrosion can be mitigated by applying a suitable lubricant or coating during installation. Additionally, maintaining a clean and dry installation environment can help prolong the lifespan and performance of the screw ³.

Cummins Overview

Cummins is a well-established company with a strong reputation in the automotive industry, particularly in the manufacturing of commercial truck components. Founded in 1919, Cummins has a long history of innovation and quality, providing reliable and high-performance parts for various applications. The company’s commitment to excellence is evident in its rigorous manufacturing processes and continuous investment in research and development, ensuring that its products meet the demanding requirements of the commercial truck industry.

Hexagon Flanged Head Cap Screw (Part 3098740) in Cummins Engines

The Hexagon Flanged Head Cap Screw, identified by part number 3098740, is a critical component in various Cummins engines. This part is designed to provide secure fastening in applications where high strength and durability are essential. Below is a detailed description of how this screw fits into different Cummins engines.

G Series Engines

The G series engines, including G5.9, G8.3, G855, G855 CM558, and GTA38 G CMEICS G116C, utilize the 3098740 screw in several critical applications. These engines are known for their robust design and are often used in heavy-duty applications. The screw is typically used in securing components such as cylinder heads, valve covers, and other critical assemblies that require reliable fastening.

N Series Engines

The N14 G engine also incorporates the 3098740 screw in its construction. This engine is designed for heavy-duty applications and is known for its durability and performance. The screw is used in securing various engine components, ensuring that the engine operates smoothly and efficiently.

QSB Series Engines

The QSB series engines, including QSB4.5 CM850(CM2850), QSB6.7 CM850(CM2850), and QSB7 CM2880 B117, use the 3098740 screw in several key areas. These engines are designed for a range of applications, from agricultural to industrial use. The screw is used to secure components such as the cylinder head, intake manifold, and other critical parts that require a strong and reliable fastening solution.

QSK Series Engines

The QSK series engines, including QSK19 CM500, QSK19 CM850 MCRS, QSK19G, QSK50 CM2150 K107, QSK50 CM2150 MCRS, QSK50 CM2350 K108, and QSK60 CM850 MCRS, also incorporate the 3098740 screw. These engines are designed for high-performance applications and are used in various industries, including marine, power generation, and construction. The screw is used in securing components such as the cylinder head, valve cover, and other critical assemblies that require a high level of strength and reliability.

Role of Part 3098740 Hexagon Flanged Head Cap Screw in Engine Systems

The part 3098740 Hexagon Flanged Head Cap Screw is instrumental in securing and maintaining the integrity of various engine components. Its robust design ensures reliable fastening across a range of critical systems.

Air Cleaner

In the air cleaner assembly, this screw is used to secure the air filter housing, ensuring a tight seal that prevents unfiltered air from entering the engine.

Camshaft

For camshaft installations, the Hexagon Flanged Head Cap Screw is employed to fasten the camshaft to the cylinder head, providing the necessary torque to withstand the dynamic forces generated during engine operation.

Corrosion Resistor

Within corrosion-resistant components, such as heat shields or guard packages, this screw plays a role in attaching protective layers, ensuring they remain firmly in place under varying environmental conditions.

Cylinder Block

The screw is utilized in the cylinder block to secure various attachments and sensors, contributing to the structural stability of the engine’s core component.

Electronic Control Module Wiring Harness

In the electronic control module (ECM) wiring harness, the screw is used to mount the ECM securely, ensuring electrical connections remain intact and protected.

Engine Control Module

Similarly, for the engine control module, this screw ensures the module is fastened correctly, maintaining the integrity of the control system.

Engine Cooling System

In the engine cooling system, the screw is used to attach components such as the thermostat housing or coolant passages, ensuring a leak-free and efficient cooling process.

Extension Harness

For extension harnesses in the ignition system, the screw secures connections, providing stability and reliability in electrical transmissions.

Fuel Control Module

In fuel control modules, the screw is essential for mounting the module, ensuring precise fuel delivery and management.

Guard Package

Within guard packages, the screw is used to attach protective covers, safeguarding sensitive engine components from debris and environmental factors.

Heat Shield

Heat shields rely on this screw to maintain their position, protecting nearby components from excessive heat generated by the engine.

Ignition System

The screw is integral in the ignition system for securing components such as coil packs or spark plug wires, ensuring consistent ignition performance.

Ignition System Arrangement

In complex ignition system arrangements, the screw helps in fastening multiple components, ensuring the system operates harmoniously.

Oil Replenishing System Plumbing

For oil replenishing system plumbing, the screw is used to secure fittings and connections, maintaining the integrity of the oil supply system.

Performance Parts

In performance parts, such as turbochargers or aftermarket intake systems, the screw ensures these components are securely mounted, enhancing overall engine performance.

Service Coupling 2008 Assembly and Service Coupling 2009 Assembly

These assemblies utilize the screw to secure couplings, ensuring reliable connections in service applications.

Turbocharger Arrangement

In turbocharger arrangements, the screw is used to attach the turbocharger to the engine, ensuring it operates efficiently under high-stress conditions.

Turbocharger Coolant Plumbing

For turbocharger coolant plumbing, the screw secures coolant passages, ensuring effective cooling of the turbocharger and preventing overheating.

Conclusion

The 3098740 Hexagon Flanged Head Cap Screw is a vital component in the assembly and maintenance of commercial trucks and various Cummins engines. Its robust design, ease of installation, and resistance to loosening make it an essential part for securing critical components across a wide range of applications. Regular maintenance and proper installation practices ensure the longevity and reliability of this screw, contributing to the overall performance and stability of the vehicle.