3900627
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, specifically Part #3900627 by Cummins, is a vital component in the maintenance and operation of commercial trucks. Cummins, a renowned manufacturer in the automotive industry, produces this screw to meet the demanding requirements of heavy-duty applications. This screw is designed to provide reliable fastening solutions, ensuring the integrity and performance of truck components.

Basic Concepts of Hexagon Flange Head Cap Screw

A Hexagon Flange Head Cap Screw is engineered with a hexagonal head, a flange beneath the head, and a threaded shank. The hexagonal head allows for efficient torque application using standard tools, while the flange distributes the load and prevents the screw from sinking into the material. Commonly made from materials like alloy steel or stainless steel, these screws are chosen for their strength and resistance to corrosion. In the automotive industry, they are typically used for securing critical components that require high tensile strength and durability ¹.

Purpose and Role in Truck Operation

This Cummins part plays a specific role in truck operation by securing various components that are subject to significant stress and vibration. It ensures that parts remain firmly attached, contributing to the overall structural integrity and safety of the vehicle. By providing a secure fastening solution, this screw helps maintain the alignment and functionality of truck components, which is crucial for optimal performance and longevity ².

Key Features

The 3900627 features a hexagonal head that allows for precise torque application, reducing the risk of over-tightening or stripping. The flange beneath the head provides additional surface area, which helps distribute the load and prevents the screw from pulling through the material. Its cap screw design ensures a strong, threaded connection that can withstand heavy-duty conditions. These features collectively enhance the screw’s performance and reliability in demanding applications ³.

Benefits

Using the 3900627 offers several advantages. Its design allows for improved torque application, ensuring that components are securely fastened without the risk of damage. The screw’s resistance to loosening under vibration makes it ideal for use in dynamic environments. Additionally, its durability under heavy-duty conditions ensures long-term reliability, reducing the need for frequent replacements and maintenance ⁴.

Installation and Usage

Proper installation of the 3900627 is crucial for ensuring secure fastening. It is recommended to use a torque wrench to apply the appropriate amount of torque, as specified by the manufacturer, to avoid over-tightening or under-tightening. Best practices include cleaning the installation surface to remove any debris or contaminants that could affect the screw’s performance. Following these guidelines will help ensure a secure and lasting connection.

Troubleshooting and Maintenance

Common issues with the 3900627 may include loosening due to vibration or corrosion over time. Regular inspections can help identify these problems early. Maintenance tips include reapplying torque periodically to ensure the screw remains securely fastened and using corrosion-resistant coatings or treatments to prolong its service life. Addressing these issues promptly can help maintain the screw’s performance and reliability.

Cummins: Manufacturer Overview

Cummins Inc. is a leading manufacturer in the automotive industry, known for its high-quality components for commercial vehicles. With a rich history of innovation and a strong reputation for reliability, Cummins is committed to producing parts that meet the rigorous demands of heavy-duty applications. Their expertise and dedication to quality make them a trusted name in the industry, ensuring that their products, like the 3900627, deliver exceptional performance and durability.

Cummins Engine Part 3900627: Hexagon Flange Head Cap Screw

The Cummins part 3900627, a Hexagon Flange Head Cap Screw, is a critical component in the assembly and maintenance of 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 part fits with the listed engines, grouped where applicable.

Engines with 4B3.9 and B3.9 G

The Hexagon Flange Head Cap Screw is used in the 4B3.9 and B3.9 G engines for securing various components, including cylinder heads and engine blocks. Its design ensures a tight and reliable connection, which is crucial for maintaining engine integrity and performance.

Engines with 6B5.9 and B5.9 G

In the 6B5.9 and B5.9 G engines, the part 3900627 is employed to fasten critical parts such as the turbocharger housing and other engine mounts. The screw’s flange head provides a large surface area for torque application, ensuring that these components remain securely attached under high stress conditions.

Engines with 6C8.3 and C8.3 G

For the 6C8.3 and C8.3 G engines, this screw is used in the assembly of the engine block and other structural components. The flange head allows for even distribution of pressure, which is essential for maintaining the structural integrity of these parts.

Engines with B4.5 CM2350 B129B and B4.5 RGT

In the B4.5 CM2350 B129B and B4.5 RGT engines, the Hexagon Flange Head Cap Screw is utilized for securing the cylinder heads and other critical engine components. Its robust design ensures that these parts remain tightly fastened, which is vital for engine performance and longevity.

Engines with B5.6 CM2670 B152B and B5.9 CM2670 B166C

For the B5.6 CM2670 B152B and B5.9 CM2670 B166C engines, this screw is used in the assembly of the engine block and other structural components. Its flange head provides a large surface area for torque application, ensuring that these components remain securely attached under high stress conditions.

Engines with B5.9 CM2670 B166C and B5.9 GAS PLUS CM556

In the B5.9 CM2670 B166C and B5.9 GAS PLUS CM556 engines, the part 3900627 is used for securing the turbocharger housing and other engine mounts. The screw’s flange head provides a large surface area for torque application, ensuring that these components remain securely attached under high stress conditions.

Engines with B6.7 CM2350 B135B, B6.7 CM2670 B153B, and B6.7 CM2670 B164C

For the B6.7 CM2350 B135B, B6.7 CM2670 B153B, and B6.7 CM2670 B164C engines, this screw is used in the assembly of the engine block and other structural components. Its flange head allows for even distribution of pressure, which is essential for maintaining the structural integrity of these parts.

Engines with B6.7 G CMOH6.0 B125

In the B6.7 G CMOH6.0 B125 engine, the Hexagon Flange Head Cap Screw is used for securing the cylinder heads and other critical engine components. Its robust design ensures that these parts remain tightly fastened, which is vital for engine performance and longevity.

Engines with C GAS PLUS CM556

For the C GAS PLUS CM556 engine, this screw is used in the assembly of the engine block and other structural components. Its flange head provides a large surface area for torque application, ensuring that these components remain securely attached under high stress conditions.

Engines with D4.0 CM2620 D103B

In the D4.0 CM2620 D103B engine, the part 3900627 is used for securing the turbocharger housing and other engine mounts. The screw’s flange head provides a large surface area for torque application, ensuring that these components remain securely attached under high stress conditions.

Engines with F2.8 CM2620 F135B, F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F3.8 F102, F4.5 CM2620 F139B, and F4.5 CM2620 F141C

For the F2.8 CM2620 F135B, F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F3.8 F102, F4.5 CM2620 F139B, and F4.5 CM2620 F141C engines, this screw is used in the assembly of the engine block and other structural components. Its flange head allows for even distribution of pressure, which is essential for maintaining the structural integrity of these parts.

Hexagon Flange Head Cap Screw (Part 3900627) Usage in Engine Systems

The Hexagon Flange Head Cap Screw, identified by part number 3900627, is an essential fastening component utilized across various engine systems to ensure secure and reliable connections. Its application spans a wide array of engine components, contributing to the overall integrity and functionality of the engine assembly.

Air Heater Starting Aid

In the air heater starting aid system, the Hexagon Flange Head Cap Screw is employed to fasten the heater housing to the engine block. This secure attachment ensures that the heater operates efficiently, providing the necessary warmth to aid in engine starting under cold conditions.

Alternator Wiring Harness

For the alternator wiring harness, these screws are used to mount the harness securely to the engine frame. This ensures that the electrical connections remain stable and protected from vibrations, which is vital for consistent alternator performance and reliable power generation.

Belt Tensioner

The belt tensioner, which maintains the proper tension on the engine’s drive belts, utilizes Hexagon Flange Head Cap Screws to attach the tensioner assembly to the engine block. This secure mounting is crucial for the tensioner’s ability to adjust belt tension dynamically as the engine operates.

Breather Tube

In the breather tube system, these screws are used to fasten the breather tube to the crankcase. This connection allows for the release of pressure and contaminants from the engine’s crankcase, maintaining a clean and pressurized environment within the engine.

Cabin Heater Plumbing

For the cabin heater plumbing, Hexagon Flange Head Cap Screws are used to secure the plumbing components to the engine block and other structural parts. This ensures that the heater system can efficiently transfer heat from the engine to the cabin, providing comfort to occupants.

Camshaft

The camshaft, a pivotal component in the engine’s valve train, uses these screws to secure various mounting brackets and accessories. This ensures that the camshaft remains aligned and operates smoothly, contributing to the engine’s overall performance.

Damper Guard

In the damper guard system, these screws are utilized to attach the guard to the engine’s vibration damper. This secure attachment protects the damper from damage and ensures it functions correctly to reduce engine vibrations.

Drain Location

At the drain location, Hexagon Flange Head Cap Screws are used to secure drain plugs and fittings. This ensures that fluid drainage processes are efficient and leak-free, maintaining the engine’s lubrication system integrity.

Electronic Control Module Wiring Harness

For the electronic control module (ECM) wiring harness, these screws are employed to mount the ECM securely to the engine bay. This stable attachment ensures that the ECM can accurately monitor and control engine functions without interference from vibrations.

Electronic Engine Monitor

In the electronic engine monitor system, these screws are used to fasten the monitor to the engine or its mounting bracket. This secure connection ensures that the monitor can reliably gather and transmit engine performance data.

Engine Instruments

Engine instruments, which provide vital data to the operator, use these screws to attach gauges and sensors to the engine block or dashboard. This ensures that the instruments remain accurately positioned and functional.

Engine Oil Cooler

For the engine oil cooler, Hexagon Flange Head Cap Screws are used to mount the cooler to the engine or its supporting structure. This secure attachment ensures that the oil cooler can effectively dissipate heat from the engine oil, maintaining optimal operating temperatures.

Fan Drive Mounting

In the fan drive mounting system, these screws are utilized to secure the fan drive to the engine. This ensures that the fan operates efficiently to cool the engine, preventing overheating.

Fuel Plumbing

For fuel plumbing, these screws are used to fasten fuel lines and fittings to the engine and its components. This secure connection ensures that the fuel system remains leak-free and operates efficiently.

Fuel System Accessories

Fuel system accessories, such as filters and regulators, use these screws to attach to the engine or fuel lines. This ensures that these accessories function correctly and contribute to the engine’s fuel delivery system.

Heat Shield

In the heat shield system, these screws are employed to attach the shield to the engine or exhaust components. This secure mounting protects nearby parts from excessive heat, ensuring the engine’s safe operation.

Injector Plumbing

For injector plumbing, Hexagon Flange Head Cap Screws are used to secure injector lines and fittings to the engine. This ensures that the fuel injection system operates precisely, contributing to the engine’s performance and efficiency.

Intake Manifold Cover

The intake manifold cover, which protects the intake manifold, uses these screws to attach to the engine. This secure connection ensures that the cover remains in place and protects the manifold from debris and damage.

Oil Pan

In the oil pan system, these screws are utilized to secure the pan to the engine block. This ensures that the oil pan remains firmly attached, preventing oil leaks and maintaining the engine’s lubrication system.

Q45 S.O I Fixture Kit

For the Q45 S.O I fixture kit, these screws are used to mount the fixture to the engine or its components. This secure attachment ensures that the fixture can accurately perform its intended function within the engine system.

Radiator Mounting

In the radiator mounting system, these screws are employed to attach the radiator to the engine bay. This ensures that the radiator remains securely in place, allowing it to effectively cool the engine.

Rocker Lever Housing

For the rocker lever housing, these screws are used to secure the housing to the engine block. This ensures that the housing remains firmly attached, protecting the rocker levers and contributing to the engine’s valve train operation.

Step Time Control Interface

In the step time control interface system, these screws are utilized to mount the interface to the engine or its control system. This secure attachment ensures that the interface can accurately control engine timing, contributing to overall performance.

Turbocharger Kit

For the turbocharger kit, these screws are used to secure the turbocharger to the engine. This ensures that the turbocharger remains firmly attached, allowing it to effectively boost engine performance.

Turbocharger Plumbing

In the turbocharger plumbing system, these screws are employed to fasten turbocharger lines and fittings to the engine. This secure connection ensures that the turbocharger system operates efficiently, contributing to the engine’s power and performance.

Conclusion

The 3900627 Hexagon Flange Head Cap Screw by Cummins is a critical component in the maintenance and operation of commercial trucks and various Cummins engines. Its design, featuring a hexagonal head and flange, ensures secure fastening and reliable performance under heavy-duty conditions. Proper installation and maintenance are essential to maximize its benefits and ensure long-term reliability.

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