3069809
Hexagon Flange Head Cap Screw
Cummins®

Introduction

The Hexagon Flange Head Cap Screw, identified by part number 3069809, is a specialized fastener produced by Cummins, a prominent manufacturer in the commercial truck industry. This screw is integral to the assembly and maintenance of various truck components, ensuring both the structural integrity and operational efficiency of commercial vehicles. Cummins, known for its robust and reliable parts, provides this screw as part of its extensive lineup of high-quality automotive components.

Basic Concepts

The Hexagon Flange Head Cap Screw is designed with specific features that enhance its functionality and durability. Its hexagonal head allows for efficient torque application using standard tools, while the flange provides a larger bearing surface that distributes load more evenly. The screw is typically manufactured from high-strength steel, which undergoes a series of precision machining and heat treatment processes to ensure it meets the demanding requirements of commercial truck applications ¹.

Functionality

Within the context of a commercial truck, the Hexagon Flange Head Cap Screw plays a role in securing various components, from engine parts to chassis assemblies. Its design ensures that it can withstand significant stress and vibration, which are common in heavy-duty truck operations. By providing a secure and stable connection, this screw helps maintain the structural integrity of the truck, contributing to overall safety and performance ².

Purpose and Role

The 3069809 Hexagon Flange Head Cap Screw serves a specific purpose in truck operations. It is utilized in applications where a high degree of torque is required, and where the screw must resist loosening over time. This screw is often found in critical assemblies such as engine mounts, transmission housings, and frame components, where its reliable performance is vital for the truck’s operation ³.

Key Features

Several key features contribute to the effectiveness of the Hexagon Flange Head Cap Screw. The hexagonal head design allows for easy and secure tool engagement, reducing the risk of cam-out during installation or removal. The flange feature provides an increased surface area that enhances load distribution and prevents the screw from digging into the connected materials. Additionally, the cap screw construction ensures that the screw remains covered, protecting the threads from debris and corrosion.

Benefits

The Hexagon Flange Head Cap Screw offers several benefits that make it suitable for demanding commercial truck applications. Its design allows for enhanced torque application, ensuring that components are securely fastened. The flange feature improves load distribution, reducing the risk of material deformation. Furthermore, the screw’s construction increases its resistance to loosening, which is crucial in environments where vibrations are common.

Installation Guidelines

Proper installation of the Hexagon Flange Head Cap Screw is vital for its performance and longevity. To install, first, ensure that the mating surfaces are clean and free of debris. Use a torque wrench to apply the specified torque, which is typically provided in the vehicle’s service manual. It is important to follow the recommended torque specifications to avoid over-tightening, which can lead to thread damage, or under-tightening, which can result in insufficient clamping force. Additionally, applying a thread locker can further enhance the screw’s resistance to loosening.

Troubleshooting and Maintenance

Common issues associated with the Hexagon Flange Head Cap Screw include loosening and corrosion. Regular inspections should be conducted to ensure that screws remain tight and show no signs of corrosion. If loosening is detected, the screw should be re-tightened to the specified torque. In cases of significant corrosion, replacement may be necessary to maintain the integrity of the connection. Using corrosion-resistant coatings or thread lockers can help mitigate these issues.

Cummins Overview

Cummins is a well-established name in the commercial truck industry, with a history of innovation and quality. The company offers a wide range of products, including engines, transmissions, and aftermarket parts, all designed to meet the rigorous demands of heavy-duty applications. Cummins’ reputation for reliability and performance underscores the quality of its parts, including the 3069809 Hexagon Flange Head Cap Screw. The company’s commitment to excellence ensures that its products are manufactured to the highest standards, providing truck operators with the confidence that their vehicles are equipped with top-tier components.

Cummins Engine Part 3069809: Hexagon Flange Head Cap Screw

The Cummins part number 3069809, a Hexagon Flange Head Cap Screw, is a critical component used across various Cummins engine models. This screw is designed to provide secure fastening in applications that require high strength and durability. Below is a detailed look at how this part fits into different Cummins engine families:

15N Series Engines

• 15N CM2380 M104B
• ISB CM2150
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB4.5 CM2350 B104
• ISB6.7 CM2250
• ISBE CM2150
• ISBE CM800
• ISBE4 CM850
• ISX CM870
• ISX12 CM2350 X102
• ISX12 G CM2180 EJ
• ISX12/ISX11.9 CM2250
• ISZ13 CM2150 Z105
• QSB3.3 CM2150
• QSB4.5 CM850(CM2850)
• QSB6.7 CM850(CM2850)
• QSB7 CM2880 B117

The Hexagon Flange Head Cap Screw (3069809) is utilized in the 15N series engines for securing various components, including cylinder heads, valve covers, and other critical parts. Its flange design provides a larger surface area for torque application, ensuring a tight and reliable connection.

6B Series Engines

• 6B5.9
• 6C8.3

In the 6B series engines, the 3069809 screw is used in similar applications, ensuring that components such as the cylinder head and valve covers are securely fastened. The robust design of the screw is particularly beneficial in high-stress environments typical of these engines.

B Series Engines

• B3.3
• B4.5 CM2350 B129B
• F3.8 CM2350 F120B
• F3.8 CM2620 F137B
• F4.5 CM2620 F139B

For the B series engines, the Hexagon Flange Head Cap Screw (3069809) is integral in maintaining the structural integrity of the engine. It is used to fasten components that are subjected to significant mechanical stress, ensuring that the engine operates efficiently and reliably.

QSB Series Engines

• QSB3.3 CM2150
• QSB4.5 CM850(CM2850)
• QSB6.7 CM850(CM2850)
• QSB7 CM2880 B117

In the QSB series engines, the 3069809 screw is employed to secure various engine parts, including the cylinder head and other critical components. Its design ensures that these parts remain tightly fastened, even under the demanding conditions of heavy-duty operations.

The Hexagon Flange Head Cap Screw (3069809) is a versatile and essential component in Cummins engines, providing the necessary strength and reliability for a wide range of applications. Its use across different engine series underscores its importance in maintaining the integrity and performance of Cummins engines.

Role of Part 3069809 Hexagon Flange Head Cap Screw in Engine Systems

The Part 3069809 Hexagon Flange Head Cap Screw is integral to the assembly and functionality of various engine components. Its robust design ensures secure fastening, which is essential for maintaining the integrity and performance of the engine system.

Brake System

In the brake system, this screw is often used to secure brake components such as calipers and brackets. Its flange head provides additional surface area for torque application, ensuring that brake parts remain firmly in place under high stress conditions.

Engine and Camshaft

Within the engine, the Hexagon Flange Head Cap Screw is employed to fasten the camshaft to the cylinder head. This secure attachment is vital for maintaining precise valve timing and ensuring smooth engine operation.

Compressor and Refrigerant System

For systems involving compressors and refrigerants, this screw plays a role in mounting the refrigerant compressor. It ensures that the compressor remains stable and aligned, which is crucial for efficient cooling and performance.

Cooler and Engine Oil

In oil coolers, the screw is used to attach the cooler to the engine block or other structural components. This secure attachment helps in maintaining the cooler’s position, ensuring effective heat dissipation from the engine oil.

Cylinder Head and Drive Components

The cylinder head often requires multiple fasteners to secure it to the engine block. The Hexagon Flange Head Cap Screw is ideal for this application due to its strength and resistance to loosening. Additionally, it is used in drive components such as the fan drive and water pump drive to ensure these parts remain securely attached during operation.

Engine Brake Kit and Repair Kit

In engine brake kits and repair kits, this screw is used to reassemble components after maintenance or repair. Its design allows for easy torque application, ensuring that all parts are correctly and securely fastened.

Fuel Control Module and Injectors

The fuel control module and fuel injectors require precise mounting to function correctly. The Hexagon Flange Head Cap Screw provides the necessary stability and security for these components, contributing to accurate fuel delivery and engine performance.

Harness and Electronic Control Module Wiring

In the electrical systems, this screw is used to secure harnesses and wiring to the engine control module. This ensures that all connections remain intact, reducing the risk of electrical faults.

Housing and Flywheel

For housing components such as the flywheel housing and gear housing, the screw ensures that these parts are tightly secured. This is important for maintaining the alignment and operation of the flywheel and associated gears.

Exhaust Recirculation and Plumbing

In exhaust recirculation systems and plumbing, the screw is used to attach various components, ensuring that the system remains leak-free and operates efficiently.

Performance Parts

High-performance engine parts often require secure fastening to withstand increased stress and vibrations. The Hexagon Flange Head Cap Screw is frequently used in these applications to ensure that performance parts remain firmly in place.

The versatility and reliability of the Part 3069809 Hexagon Flange Head Cap Screw make it a valuable component across a wide range of engine systems, contributing to the overall performance and durability of the engine.

Conclusion

The Hexagon Flange Head Cap Screw (part number 3069809) by Cummins is a critical component in the assembly and maintenance of commercial truck engines. Its robust design, featuring a hexagonal head and flange, ensures secure fastening and reliable performance under demanding conditions. This screw is utilized across various Cummins engine models, including the 15N, 6B, B, and QSB series, to secure critical components such as cylinder heads, valve covers, and drive components. The screw’s versatility and reliability make it indispensable in maintaining the structural integrity and operational efficiency of commercial vehicles.

References