3900630
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, identified by Part #3900630, is a critical component manufactured by Cummins, a renowned name in the commercial truck industry. This screw is essential in truck maintenance due to its robust design and reliable performance. Cummins, known for its high-quality engine and powertrain solutions, ensures that this part meets the stringent demands of commercial truck applications ¹.

Basic Concepts

The Hexagon Flange Head Cap Screw is characterized by its hexagonal head, which allows for secure fastening using a wrench or socket. The flange, a flat, circular plate at the head’s base, provides additional surface area for distribution of the clamping force, reducing the risk of the screw pulling through the material. This screw operates by threading into a pre-drilled hole, creating a strong and stable connection between two or more components within mechanical systems ².

Role in Truck Operation

In the operation and maintenance of commercial trucks, the 3900630 Hexagon Flange Head Cap Screw plays a specific role by securing critical components and assemblies. Its design ensures that parts remain firmly attached under various operational stresses, including vibrations and dynamic loads typical in truck environments. This secure fastening is vital for the integrity and safety of the truck’s structure and systems ³.

Key Features

The 3900630 Hexagon Flange Head Cap Screw boasts several key features that enhance its functionality and reliability. The hexagonal head design allows for efficient and secure tightening and loosening, minimizing the risk of cam-out. The flange characteristic provides additional bearing surface, which helps in distributing the load more evenly and preventing damage to the fastened material. As a cap screw, it is designed for full threading into the material, ensuring a strong and durable connection.

Benefits

The benefits of using the 3900630 Hexagon Flange Head Cap Screw include enhanced fastening security, which is crucial in environments where vibrations and dynamic loads are common. Its design resists loosening over time, which is particularly beneficial in the demanding conditions of commercial truck operation. Additionally, the ease of installation and removal using standard tools makes it a practical choice for maintenance and repair tasks.

Troubleshooting and Maintenance

Common issues associated with Hexagon Flange Head Cap Screws may include corrosion, over-tightening, or damage to the hexagonal head. Troubleshooting these problems involves inspecting the screw and the surrounding components for signs of wear or corrosion, ensuring proper torque settings during installation, and replacing damaged screws promptly. Regular maintenance practices, such as cleaning and applying appropriate coatings or lubricants, can help ensure the longevity and reliable performance of these screws.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation for innovation, quality, and reliability in the commercial truck industry. The company’s extensive product range includes engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of commercial vehicle applications. Cummins’ commitment to excellence is reflected in its products, including the 3900630 Hexagon Flange Head Cap Screw, which is engineered to deliver reliable performance in the toughest conditions.

Hexagon Flange Head Cap Screw 3900630 in Cummins Engines

The Hexagon Flange Head Cap Screw 3900630, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is designed to secure and hold parts together, ensuring the structural integrity and operational efficiency of the engine. Here’s how it fits into different Cummins engine series:

15N Series

• 15N CM2380 M104B

4B3.9 Series

• 4B3.9
• B3.9 G

6B5.9 Series

• 6B5.9
• B5.9 G
• B5.9 GAS PLUS CM556

6C8.3 Series

• 6C8.3
• C8.3 G

B4.5 Series

• B4.5
• B4.5 CM2350 B129B
• B4.5 RGT

B5.6 Series

• B5.6 CM2670 B152B

B5.9 Series

• B5.9 CM2670 B166C

B6.7 Series

• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125
• B6.7S

C Series

• C GAS PLUS CM556

D4.0 Series

• D4.0 CM2620 D103B

F2.8 Series

• F2.8 CM2620 F135B

F3.8 Series

• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102

The Hexagon Flange Head Cap Screw 3900630 is integral to the assembly and maintenance of these engines, providing a reliable fastening solution that ensures parts remain securely in place under operational stresses.

Role of Part 3900630 Hexagon Flange Head Cap Screw in Engine Systems

The Part 3900630 Hexagon Flange Head Cap Screw is integral to the assembly and securement of various components within engine systems. Its robust design ensures reliable fastening, which is essential for the proper functioning and durability of the engine.

Aftertreatment Device

In aftertreatment devices, the Hexagon Flange Head Cap Screw secures components such as catalytic converters and diesel particulate filters. This ensures that these components remain firmly in place, allowing for efficient emission control and compliance with environmental regulations.

Air Heater Starting Aid

For air heater starting aids, this screw plays a role in attaching the heater elements and housing. Secure fastening is vital to prevent any dislodgement during engine operation, ensuring consistent and reliable starting performance in cold conditions.

Crankcase Breather Mounting

The screw is used in the mounting of crankcase breather systems. Proper attachment is necessary to maintain the integrity of the breather system, which helps in managing crankcase pressure and preventing oil contamination.

Electrical Starting Accessories

In electrical starting accessories, such as solenoids and starter motors, the Hexagon Flange Head Cap Screw ensures that these components are tightly secured. This is important for the reliable engagement and disengagement of the starter mechanism.

Engine Control Module (ECM)

For the Engine Control Module, the screw is employed in mounting the ECM to its bracket or housing. Secure attachment is essential for protecting the ECM from vibrations and ensuring stable operation of the engine’s electronic controls.

Engine Instrumentation

In engine instrumentation, such as gauges and sensors, the screw is used to mount these devices securely. Accurate readings depend on the stable placement of these instruments, making the screw’s role significant in maintaining measurement integrity.

Exhaust Cooler Water Outlet Tube

The screw aids in the secure attachment of the exhaust cooler water outlet tube. This ensures that the tube remains in place, allowing for efficient cooling of exhaust gases and preventing leaks.

Exhaust Gas Temperature Sensor

For exhaust gas temperature sensors, the screw is critical in mounting the sensor to the exhaust system. Accurate temperature readings are dependent on the sensor’s secure and stable placement.

Exhaust Outlet Accessories

In exhaust outlet accessories, such as mufflers and tailpipes, the screw ensures that these components are firmly attached. This is important for maintaining the structural integrity of the exhaust system and preventing emissions leaks.

Flywheel Housing

The screw is utilized in the assembly of the flywheel housing. Secure attachment is necessary to ensure that the flywheel operates smoothly and without undue wear.

Fuel Cleaner

In fuel cleaner systems, the screw is used to mount the cleaner unit. Proper attachment ensures that the cleaner functions effectively in removing contaminants from the fuel.

Fuel Drain Plumbing

For fuel drain plumbing, the screw secures components such as valves and fittings. This ensures that the fuel drain system operates efficiently and without leaks.

Fuel Pump Replacer

In fuel pump replacement kits, the screw is used to mount the new pump securely. This is essential for the reliable operation of the fuel system.

Gear Shift Control

The screw is employed in the mounting of gear shift controls. Secure attachment ensures that the shift mechanism operates smoothly and accurately.

Hand Hole Cover

For hand hole covers, the screw ensures that these covers are tightly secured, protecting internal components from contaminants and unauthorized access.

Kit, Fuel Pump Conv.

In conversion kits for fuel pumps, the screw is used to mount new components. This ensures that the conversion is performed securely and effectively.

Kit, Repto

In repair kits, the screw is utilized to reassemble and secure components after maintenance or repair work. This ensures that the engine returns to operation in a secure and reliable state.

Muffler

The screw is used in the attachment of mufflers to the exhaust system. Secure fastening is vital to prevent vibrations and ensure efficient noise reduction.

Oil Bypass Filter

In oil bypass filters, the screw ensures that the filter is securely mounted. This is important for the filter’s effective operation in maintaining oil quality.

Power Take-Off Assembly

For power take-off assemblies, the screw is used to secure components such as shafts and housings. This ensures that the assembly operates reliably and efficiently.

Pressure Sensor

In pressure sensors, the screw is used to mount the sensor securely. Accurate pressure readings depend on the sensor’s stable placement.

Product Installation Package

In product installation packages, the screw is included to ensure that new components are securely installed. This is essential for the reliable operation of the engine system.

Protective Cover

The screw is used to secure protective covers over various engine components. This ensures that these covers remain in place, providing necessary protection from debris and environmental factors.

Raw Water Pump

In raw water pumps, the screw ensures that the pump is securely mounted. This is important for the efficient operation of the cooling system.

Rocker Lever

For rocker levers, the screw is used to secure these components in place. This ensures that the levers operate smoothly and accurately, contributing to the engine’s overall performance.

Conclusion

The 3900630 Hexagon Flange Head Cap Screw is a vital component in the maintenance and operation of commercial trucks and Cummins engines. Its robust design, reliable performance, and ease of use make it an indispensable part in securing critical components and assemblies. Regular maintenance and proper installation are essential to ensure the longevity and effectiveness of this Cummins part.