3901447
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw, part number 3901447, manufactured by Cummins, is a vital component in the maintenance and operation of commercial trucks. This screw is designed to provide secure fastening in various truck applications, ensuring the structural integrity and functionality of critical components. Cummins, a reputable name in the commercial truck industry, produces this part to meet the demanding requirements of heavy-duty truck environments ¹.

Basic Concepts of Hexagon Flange Head Cap Screws

A Hexagon Flange Head Cap Screw is a type of fastener characterized by its hexagonal head and flange beneath the head. The hexagonal head allows for efficient torque application using standard tools, while the flange provides a larger bearing surface that helps distribute the load and prevent the screw from sinking into the material. In the automotive industry, flange head cap screws are commonly used for their ability to provide a secure and stable connection in various applications ².

Purpose and Role in Truck Operation

The 3901447 Hexagon Flange Head Cap Screw plays a specific role in the operation of commercial trucks by securing components that are subject to significant stress and vibration. It ensures that parts remain firmly attached, contributing to the overall structural integrity and reliability of the truck. This screw is often used in applications where a high degree of fastening security is required, such as in engine mounts, chassis components, and other critical areas ³.

Key Features

The 3901447 Hexagon Flange Head Cap Screw features a hexagonal head design that facilitates easy and precise torque application. The flange beneath the head enhances the screw’s performance by providing a larger contact area, which helps distribute the load more evenly and reduces the risk of the screw pulling through the material. Additionally, the screw is made from high-quality materials that offer excellent resistance to corrosion and wear, ensuring durability in harsh operating environments.

Benefits

Using the 3901447 Hexagon Flange Head Cap Screw offers several benefits. Its design allows for improved torque application, ensuring that the screw is tightened to the correct specification without over-tightening or under-tightening. The flange characteristic provides resistance to loosening, which is particularly important in applications subject to vibration. Furthermore, the material properties of the screw contribute to its durability, making it suitable for use in demanding commercial truck environments.

Installation and Usage Guidelines

Proper installation of the 3901447 Hexagon Flange Head Cap Screw involves several steps to ensure a secure fit. Begin by cleaning the installation area to remove any debris or contaminants. Use a torque wrench to tighten the screw to the recommended torque setting, which ensures that the screw is properly secured without being over-tightened. It is also important to follow best practices for thread engagement to maximize the screw’s holding power.

Troubleshooting and Maintenance

Common issues associated with Hexagon Flange Head Cap Screws include loosening due to vibration and corrosion. To identify these issues, regularly inspect the screws for signs of movement or rust. Maintenance tips to prolong the lifespan of the screw include applying a thread locker to prevent loosening and using corrosion-resistant coatings to protect against environmental factors. Additionally, replacing screws that show signs of wear or damage will help ensure continued reliable performance.

Compatibility and Applications

The 3901447 Hexagon Flange Head Cap Screw is typically used in various applications within commercial trucks, including engine mounts, chassis components, and other critical areas. It is compatible with a wide range of truck models and components, making it a versatile choice for truck maintenance and repair.

Cummins: Manufacturer Overview

Cummins Inc. is a well-established manufacturer in the commercial truck industry, known for its comprehensive product range and reputation for quality. Founded in 1919, Cummins has a long history of innovation and excellence in engine and component manufacturing. The company’s commitment to producing reliable and high-performance parts has made it a trusted source for truck components, including the 3901447 Hexagon Flange Head Cap Screw.

Hexagon Flange Head Cap Screw 3901447 Compatibility with Cummins Engines

The Cummins part number 3901447, a Hexagon Flange Head Cap Screw, is designed to fit a variety of Cummins engines. This part is essential for securing components within the engine assembly, ensuring that parts remain tightly fastened and in place during operation.

Compatible Engines

• 4B3.9
• 6B5.9
• 6C8.3
• B4.5
• B4.5 CM2350 B129B
• B5.6 CM2670 B152B
• B5.9 CM2670 B166C
• B5.9 G
• B5.9 GAS PLUS CM556
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• C GAS PLUS CM556
• D4.0 CM2620 D103B
• F3.8 CM2350 F120B
• F3.8 CM2620 F137B
• F3.8 F102
• F4.5 CM2620 F139B
• G8.3
• G8.3 CM558
• GTA8.3 CM558
• ISB CM550
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB4.5 CM2350 B104

Grouping by Engine Series

• B Series Engines

  • B4.5
  • B4.5 CM2350 B129B
  • B5.6 CM2670 B152B
  • B5.9 CM2670 B166C
  • B5.9 G
  • B5.9 GAS PLUS CM556
  • B6.7 CM2670 B153B
  • B6.7 CM2670 B164C

• C Series Engines

  • C GAS PLUS CM556

• D Series Engines

  • D4.0 CM2620 D103B

• F Series Engines

  • F3.8 CM2350 F120B
  • F3.8 CM2620 F137B
  • F3.8 F102
  • F4.5 CM2620 F139B

• G Series Engines

  • G8.3
  • G8.3 CM558
  • GTA8.3 CM558

• ISB/ISD Series Engines

  • ISB CM550
  • ISB CM850
  • ISB/ISD4.5 CM2150 B119
  • ISB/ISD6.7 CM2150 SN
  • ISB4.5 CM2350 B104

• Other Series Engines

  • 4B3.9
  • 6B5.9
  • 6C8.3

This comprehensive list ensures that technicians and mechanics can confidently use the Hexagon Flange Head Cap Screw 3901447 across a wide range of Cummins engines, facilitating proper assembly and maintenance.

Role of Part 3901447 Hexagon Flange Head Cap Screw in Engine Systems

The part 3901447 Hexagon Flange Head Cap Screw is integral to the assembly and securement of various components within engine systems. Its robust design ensures reliable fastening in high-stress environments.

Air Compressor Mounting and Arrangement

In air compressor systems, the 3901447 screw is used to mount the compressor securely to its designated location. This ensures stability during operation and prevents vibrations that could lead to component failure. Additionally, it plays a role in the arrangement of components, ensuring that the air compressor is aligned correctly with other parts such as the intake and exhaust connections.

Turbocharger and Connections

For turbochargers, the 3901447 screw is employed in securing the turbocharger to the engine block or manifold. It also fastens various connections, such as the air intake and exhaust outlet, ensuring a tight seal that prevents leaks and maintains efficient airflow.

Exhaust Manifold and Exhaust System

In the exhaust manifold, this screw is used to secure the manifold to the engine block. It also plays a part in mounting the exhaust system components, ensuring that the exhaust gases are directed efficiently away from the engine.

Fuel Pump and Governor

Within the fuel system, the 3901447 screw is utilized to mount the fuel pump securely, ensuring it operates within specified parameters. It also fastens the governor, which regulates the fuel supply to the engine, maintaining optimal performance.

Engine Brake (12V) Kit

For engine brake systems, particularly the 12V kit, the screw is used to mount various components, ensuring that the brake system functions correctly under different driving conditions.

Manifold and Rocker Levers

In the manifold and rocker lever arrangements, the 3901447 screw ensures that these components are securely fastened. This is essential for maintaining the integrity of the valve train and ensuring precise valve operation.

Oil Pan and Plumbing

The screw is also used in securing the oil pan and various plumbing components. This ensures that the oil system remains leak-free and that oil is distributed efficiently throughout the engine.

Exhaust Recirculation Water Pump

In systems involving exhaust recirculation, the screw is used to mount the water pump, ensuring it operates efficiently to reduce emissions.

Corrosion Resistor and Spacers

The 3901447 screw is often paired with corrosion resistors and spacers to maintain the integrity of connections in harsh environments, ensuring longevity and reliability of the engine components.

Fan and Drive Systems

For fan and drive systems, the screw is used to secure the fan pilot and other drive components, ensuring that the cooling system operates efficiently to maintain engine temperature.

Turbocharger Location and XPI JV System Cummins HD

In high-performance engines like the Cummins HD with XPI JV systems, the screw is critical in securing the turbocharger in its optimal location, ensuring maximum efficiency and performance.

Conclusion

The 3901447 Hexagon Flange Head Cap Screw is a critical component in the maintenance and operation of commercial trucks. Its robust design, compatibility with a wide range of Cummins engines, and versatile applications make it an essential part for ensuring the structural integrity and reliability of truck components. Proper installation, regular maintenance, and understanding its role in various engine systems are key to maximizing the performance and longevity of this Cummins part.