3900625
Hexagon Flange Head Cap Screw
Cummins®

Introduction to Hexagon Flange Head Cap Screws

Hexagon flange head cap screws, commonly referred to as flange bolts, are specialized fasteners featuring a hexagonal head with an integrated flange. This design ensures a flush installation, creating a smooth surface that minimizes the risk of damage to adjacent materials. The hexagonal shape facilitates easy tightening and loosening using a wrench or socket, making these screws versatile and practical for a wide range of applications ¹.

The Role of The 3900625 Hexagon Flange Head Cap Screw in Truck Engines

The 3900625 hexagon flange head cap screw, produced by Cummins, plays a pivotal role in the assembly and functionality of commercial truck engines. These screws are essential for securing various engine components, ensuring they remain firmly fastened and correctly positioned during operation. This is vital for maintaining engine integrity and efficiency, as loose or improperly secured parts can result in mechanical failure and reduced performance ².

Troubleshooting and Maintenance of The 3900625 Hexagon Flange Head Cap Screw

Effective maintenance and troubleshooting of the 3900625 hexagon flange head cap screw are crucial for the durability and reliability of commercial truck engines. Regular inspections should be performed to verify that the screws are tight and in good condition. If a screw is found to be loose or damaged, it should be replaced promptly to prevent further complications.

In cases of mechanical failure or performance issues, the condition of the 3900625 hexagon flange head cap screw should be examined as a potential cause. If the screw is identified as the problem, it should be replaced with a new one, and the surrounding components should be inspected for any damage that may have occurred as a result ³.

Cummins Engine Compatibility with Hexagon Flange Head Cap Screw Part 3900625

The Cummins Hexagon Flange Head Cap Screw part 3900625 is a versatile component designed to fit various Cummins engine models. This screw is engineered to provide a secure fastening solution in different engine configurations, ensuring reliable performance and durability. Below is a detailed description of how this part fits with the listed Cummins engines.

Engine Families and Models

1. 15N CM2380 M104B
2. 4B3.9
3. 6B5.9
4. 6C8.3
5. B4.5 CM2350 B129B
6. B4.5 RGT
7. B5.6 CM2670 B152B
8. B5.9 CM2670 B166C
9. B5.9 G
10. B6.7 CM2350 B135B
11. B6.7 CM2670 B153B
12. B6.7 CM2670 B164C
13. C GAS PLUS CM556
14. C8.3 G
15. D4.0 CM2620 D103B
16. F2.8 CM2620 F135B
17. F3.8 CM2350 F120B
18. F3.8 CM2350 F128C
19. F3.8 CM2620 F137B
20. F4.5 CM2620 F139B
21. F4.5 CM2620 F141C
22. G5.9
23. G5.9 CM558
24. G8.3
25. ISB (Chrysler)

Application of Part 3900625

The Hexagon Flange Head Cap Screw part 3900625 is compatible with a wide range of Cummins engines, providing a secure fastening solution for various applications within these engines. Here’s how it fits with the listed engine models:

• 15N CM2380 M104B, 4B3.9, 6B5.9, 6C8.3, B4.5 CM2350 B129B, B4.5 RGT, B5.6 CM2670 B152B, B5.9 CM2670 B166C, B5.9 G, B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C, C GAS PLUS CM556, C8.3 G, D4.0 CM2620 D103B, F2.8 CM2620 F135B, F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F4.5 CM2620 F139B, F4.5 CM2620 F141C, G5.9, G5.9 CM558, G8.3, ISB (Chrysler): This screw is designed to fit in areas where a flange head screw is required for securing components within these engines. Its flange head design provides a larger bearing surface, which is essential for distributing the load evenly and preventing damage to the fastened parts.

The part 3900625 is engineered to meet the stringent requirements of Cummins engines, ensuring compatibility and reliability across various engine models. Its use in these engines helps maintain the structural integrity and operational efficiency of the engine components.

Role of Part 3900625 Hexagon Flange Head Cap Screw in Engine Systems

The Part 3900625 Hexagon Flange Head Cap Screw is instrumental in securing and maintaining the integrity of various components within engine systems. Its application spans across multiple subsystems, ensuring reliable operation and structural stability.

Air Intake Heater Arrangement

In the air intake heater arrangement, the Hexagon Flange Head Cap Screw is used to fasten the heater elements and housing. This ensures that the heater components remain securely in place, allowing for efficient preheating of the intake air, which is essential for optimal engine performance in cold conditions.

Aftertreatment Arrangement

Within the aftertreatment system, this screw plays a role in securing catalytic converters, diesel particulate filters (DPF), and selective catalytic reduction (SCR) components. Proper fastening is vital to maintain the structural integrity of these components, ensuring they function correctly to reduce emissions.

Compressor Coolant System

In the compressor coolant system, the screw is employed to secure coolant passages and fittings. This is important for maintaining the structural integrity of the coolant system, ensuring consistent coolant flow to the compressor, which is necessary for efficient cooling and prolonged component life.

Battery System

The Hexagon Flange Head Cap Screw is utilized in the battery system to secure battery terminals and mounting brackets. This ensures a stable and reliable electrical connection, which is essential for consistent battery performance and safety.

Camshaft and Gear

In the camshaft and gear assembly, this screw is used to fasten camshaft bearings and gear housings. Secure fastening is necessary to maintain precise alignment and operation of the camshaft, which directly influences engine timing and performance.

Electronic Control Module (ECM) Wiring Harness

The screw is integral in securing the ECM wiring harness to the engine block or other structural components. This ensures that the wiring remains organized and protected, facilitating reliable data transmission between the ECM and various engine sensors and actuators.

Engine Instrumentation

For engine instrumentation, the screw is used to mount sensors and gauges to the engine block or other surfaces. This ensures accurate readings and reliable data collection, which is essential for monitoring engine health and performance.

Lubricating Oil System

In the lubricating oil system, the screw secures oil filters, pressure relief valves, and other components. Proper fastening ensures that these components remain in place, allowing for efficient oil filtration and pressure regulation, which are vital for engine lubrication.

Alternator Wiring Harness

The screw is used to secure the alternator wiring harness, ensuring that electrical connections remain stable and reliable. This is important for consistent alternator performance and efficient charging of the battery.

Housing and Thermostat

In housing assemblies, such as those for the thermostat, the screw ensures that the housing remains securely attached to the engine block. This is essential for maintaining proper coolant flow and temperature regulation within the engine.

Injector and Manifold Exhaust

For fuel injectors and exhaust manifolds, the screw is used to secure these components to the engine block or cylinder head. This ensures that injectors deliver fuel precisely and that exhaust manifolds manage exhaust gases efficiently, contributing to overall engine performance.

Fuel Control Module

In the fuel control module, the screw secures various components, ensuring that the module remains intact and functions correctly. This is vital for precise fuel delivery and engine operation.

Monitor and Electronic Engine Components

The screw is used to secure monitors and other electronic engine components, ensuring they remain in place and function reliably. This is important for accurate engine monitoring and control.

Oil Pan

In the oil pan assembly, the screw is used to secure the pan to the engine block. This ensures that the oil pan remains sealed and intact, allowing for efficient oil storage and circulation.

Aftercooler Water and Turbocharger Coolant Plumbing

For aftercooler water and turbocharger coolant plumbing, the screw secures fittings and passages. This ensures consistent coolant flow, which is essential for efficient cooling of the aftercooler and turbocharger, contributing to engine performance and longevity.

Starting Aid Kit and Turbocharger

The screw is also used in the starting aid kit and turbocharger assemblies to secure various components. This ensures that these systems remain intact and function correctly, which is vital for engine starting and turbocharging efficiency.

Conclusion

The 3900625 Hexagon Flange Head Cap Screw by Cummins is a critical component in the assembly and maintenance of commercial truck engines. Its versatile design and compatibility with various Cummins engine models make it an essential part for securing engine components, ensuring reliable operation, and maintaining engine integrity. Regular maintenance and prompt replacement of damaged screws are vital for the durability and performance of these engines.