3679118
Hexagon Flange Head Cap Screw
Cummins®

Introduction to the Hexagon Flange Head Cap Screw

The hexagon flange head cap screw, commonly referred to as a hex flange bolt, is a versatile fastener widely utilized across various industries, including commercial trucking. This screw is characterized by its hexagonal head, which facilitates easy tightening and loosening using a wrench or socket, and a flange that offers a larger bearing surface. This design ensures better load distribution, making it ideal for applications that experience significant stress and vibration ¹.

The Role of the Hexagon Flange Head Cap Screw in Truck Operations

In the realm of commercial trucks, the hexagon flange head cap screw is indispensable. It is employed to secure critical components and assemblies such as engine parts, brackets, and structural elements. The screw’s robust design ensures a secure and dependable connection, which is vital under the demanding conditions of truck operation. The flange provides additional stability, distributing the load more effectively and reducing the risk of component failure ².

The Purpose of the Cummins 3679118 Hexagon Flange Head Cap Screw

The Cummins 3679118 hexagon flange head cap screw is a premium fastener specifically engineered for Cummins engines and other heavy-duty applications. This screw is designed to endure the harsh environments and rigorous demands of commercial truck operations. Its high-quality construction ensures reliable and durable performance, making it a critical component in maintaining the integrity and efficiency of Cummins engines.

Integration into the Engine System

This Cummins part is meticulously designed to integrate seamlessly into the engine system. Its precise threading and robust construction allow it to withstand the high torque and thermal stresses encountered in engine assemblies. The flange head provides additional surface area, enhancing the screw’s ability to distribute loads and resist loosening, which is crucial for the longevity and performance of the engine ¹.

Compatibility and Brand Quality

The Cummins 3679118 hexagon flange head cap screw is engineered to meet the stringent standards required for heavy-duty applications. It is compatible with a wide range of Cummins engine models, ensuring that it can be used across various commercial truck fleets. Cummins is renowned for its commitment to quality and innovation, and this screw is no exception. Its superior material quality and precise manufacturing processes ensure that it can withstand the extreme conditions of truck operations ².

VMRS Reference

For those familiar with the Vehicle Maintenance Reporting Standards (VMRS), the Cummins 3679118 hexagon flange head cap screw can be classified under the VMRS code for fasteners. This standardized coding system allows for efficient tracking and reporting of maintenance and replacement activities, ensuring that fleet managers and mechanics can easily identify and manage this critical component.

Troubleshooting and Maintenance Tips

To ensure the optimal performance and longevity of the Cummins 3679118 hexagon flange head cap screw, adherence to proper maintenance and troubleshooting practices is essential. Here are some key tips:

1. Regular Inspection: Conduct routine inspections of the screw for any signs of wear, damage, or loosening. Early detection of issues can prevent more significant problems down the line.
2. Proper Torque: Use the manufacturer’s recommended torque specifications when installing the screw. Over-tightening can cause damage, while under-tightening may lead to loosening and failure.
3. Lubrication: Apply the appropriate lubrication to the screw threads and bearing surfaces to minimize friction and wear. This is particularly important in high-stress and high-temperature environments.
4. Cleaning: Maintain cleanliness around the screw and its surrounding areas to prevent corrosion and other forms of damage. Use suitable cleaning agents and techniques to preserve the screw’s integrity.

About Cummins

Cummins is a globally recognized leader in power solutions, renowned for its innovative engine designs, technologies, and comprehensive parts and services. With a steadfast commitment to quality, innovation, and customer satisfaction, Cummins has earned a reputation as a trusted partner in the commercial truck and heavy-duty industries. By leveraging Cummins’ high-quality components like the 3679118 hexagon flange head cap screw, fleet operators can ensure the reliable and efficient performance of their vehicles.

Compatibility of the Cummins 3679118 Hexagon Flange Head Cap Screw with Cummins Engines

The Cummins 3679118 hexagon flange head cap screw is a critical component in securing various parts within the engine assembly. This screw is designed to provide a robust and reliable fastening solution, ensuring that engine components remain securely in place under operational stresses. Below is a detailed overview of the engines with which this screw is compatible:

Compatible Engines

• 15N CM2380 M104B
• B4.5 CM2350 B129B
• B4.5 RGT
• B5.6 CM2670 B152B
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• D4.0 CM2620 D103B
• F2.8 CM2620 F135B
• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C
• G5.9
• G5.9 CM558
• G8.3
• G8.3 CM558
• G855 CM558
• GTA38 G CMEICS G116C
• GTA855 CM558 (CM2358) G101
• ISB (Chrysler)
• ISB CM2150
• ISB4.5 CM2350 B104
• ISB6.7 CM2250

Grouping of Compatible Engines

Group 1: B Series Engines

• B4.5 CM2350 B129B
• B4.5 RGT
• B5.6 CM2670 B152B
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B

Group 2: F Series Engines

• F2.8 CM2620 F135B
• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

Group 3: G Series Engines

• G5.9
• G5.9 CM558
• G8.3
• G8.3 CM558
• G855 CM558

Group 4: GTA Series Engines

• GTA38 G CMEICS G116C
• GTA855 CM558 (CM2358) G101

Group 5: ISB Series Engines

• ISB (Chrysler)
• ISB CM2150
• ISB4.5 CM2350 B104
• ISB6.7 CM2250

Group 6: D Series Engine

• D4.0 CM2620 D103B

Group 7: 15N Series Engine

• 15N CM2380 M104B

The Cummins 3679118 hexagon flange head cap screw is engineered to meet the stringent requirements of Cummins engines, ensuring durability and performance across a wide range of engine types and configurations.

Role of the 3679118 Hexagon Flange Head Cap Screw in Engine Systems

The 3679118 hexagon flange head cap screw is instrumental in securing and maintaining the integrity of various components within engine systems. Its design allows for efficient fastening, ensuring that parts remain firmly in place under operational stress.

Air Management Components

In the air baffle and air cleaner systems, the hexagon flange head cap screw is used to secure components that direct and filter air intake. This ensures optimal airflow and filtration efficiency, contributing to engine performance.

For the air precleaner, this screw plays a role in attaching the precleaner to the main air cleaner assembly, enhancing the initial stage of air filtration before it reaches the engine.

Electrical and Control Systems

Within the battery system, the screw is employed to fasten battery terminals and connections, ensuring a secure and reliable electrical connection. This is vital for consistent power delivery to the engine and its ancillary systems.

In the electronic control module wiring harness and engine control wiring harness, the screw is used to secure wiring connections, preventing loose connections that could lead to intermittent electrical issues.

The electronic engine monitor and electronic governor rely on this screw to maintain the structural integrity of their housings and internal components, ensuring accurate monitoring and control of engine parameters.

Engine and Emission Control

The crankcase breather and crankcase breather plumbing arrangement utilize the screw to secure breather components, allowing for the safe release of pressure and contaminants from the crankcase, thus maintaining engine health.

In the fuel control module, the screw ensures that fuel delivery components are securely fastened, contributing to precise fuel management and engine efficiency.

The heat shield attachment often involves this screw, protecting nearby components from excessive heat generated by the engine.

Mechanical and Structural Components

For the incomplete turbocharger and turbocharger kit, the screw is used to secure turbocharger components, ensuring they remain intact under high-pressure and high-temperature conditions.

In the long block assembly, this screw fastens various engine components, contributing to the overall structural integrity of the engine.

The oil level gauge relies on the screw to secure its housing and sensing components, ensuring accurate oil level readings.

Cooling and Valve Systems

The pressure regulator valve and rocker lever assemblies use the screw to secure components that regulate pressure and control valve operation, respectively.

The rocker lever assembly benefits from the screw’s ability to maintain tight fastening, ensuring consistent valve operation and engine performance.

The thermostat housing utilizes the screw to secure the housing, which is essential for maintaining proper coolant flow and engine temperature.

Additional Systems

The throttle valve system employs the screw to secure components that control air intake, directly influencing engine performance and fuel efficiency.

In the upfit kit, the screw is used to secure additional components or modifications, ensuring they are safely and effectively integrated into the engine system.

Conclusion

The Cummins 3679118 hexagon flange head cap screw is a critical component in the maintenance and operation of Cummins engines. Its robust design, compatibility with a wide range of engine models, and integration into various engine systems make it an indispensable part of commercial truck operations. Proper maintenance and adherence to recommended practices ensure the longevity and performance of this essential fastener.