3968475
Hexagon Flange Head Cap Screw
Cummins®

The Hexagon Flange Head Cap Screw (Part #3968475) by Cummins is a critical component in commercial truck applications, particularly in heavy-duty trucks. This screw ensures structural integrity and functionality across various truck components. Cummins, a renowned manufacturer in the diesel engine and related components sector, is known for its high-quality and reliable parts for the commercial vehicle industry.

Basic Concepts

A Hexagon Flange Head Cap Screw is a fastener characterized by its hexagonal head and flanged base. The hexagonal head allows for efficient torque application using standard tools, while the flange provides additional surface area for distributing clamping force. Typically made from alloy steel or stainless steel, these screws are designed to withstand high stress and corrosion. In the automotive industry, they are used in applications requiring secure and durable fastening solutions. Within mechanical assemblies, the Hexagon Flange Head Cap Screw joins components securely, distributes clamping force evenly, and resists loosening due to vibration ¹.

Purpose and Function in Trucks

The 3968475 Hexagon Flange Head Cap Screw plays a vital role in truck operations by contributing to the structural integrity and functionality of various truck components. Typical applications include securing engine mounts, attaching body panels, and fastening critical components within the engine compartment. By ensuring these parts remain firmly in place, the screw helps maintain the overall performance and safety of the truck ².

Key Features

The 3968475 Hexagon Flange Head Cap Screw features a hexagonal head design, allowing for straightforward and efficient torque application. The flange characteristic provides an increased surface area, enhancing the distribution of clamping force and reducing the risk of component damage. As a cap screw, it is designed for through-bolting applications, where it passes completely through the joined materials and is secured with a nut on the opposite side. These features collectively enhance the screw’s performance and reliability in truck applications ³.

Benefits

Using the 3968475 Hexagon Flange Head Cap Screw offers several benefits. Its design provides improved fastening security, ensuring that components remain firmly attached under various operating conditions. The screw’s resistance to vibration helps maintain secure fastening over time, reducing the need for frequent re-tightening. Additionally, the ease of installation and removal using standard tools contributes to efficient maintenance and repair processes, enhancing the overall efficiency and safety of truck operations.

Troubleshooting and Maintenance

Common issues with Hexagon Flange Head Cap Screws may include loosening due to vibration, corrosion, or damage from over-torquing. To address these issues, regular inspections should be conducted to check for signs of wear, corrosion, or loosening. If corrosion is detected, the affected screw should be replaced to prevent further degradation. Ensuring that the correct torque specifications are used during installation can help prevent damage and loosening. Additionally, applying an anti-seize compound can protect against corrosion and facilitate easier removal in the future.

Manufacturer Information - Cummins

Cummins Inc. is a leading manufacturer with a rich history in the commercial vehicle industry. The company is widely recognized for its diesel engines and related components, demonstrating a strong commitment to quality and innovation. Cummins’ expertise in manufacturing truck parts is evident in their rigorous testing and quality control processes, ensuring that their products meet the high standards required for heavy-duty applications. The company’s reputation for reliability and performance makes it a preferred choice among commercial truck operators and maintenance professionals.

Hexagon Flange Head Cap Screw 3968475 in Cummins Engines

The Hexagon Flange Head Cap Screw 3968475, manufactured by Cummins, is a critical component used across various Cummins engine models. This part is essential for securing components within the engine assembly, ensuring structural integrity and operational efficiency.

Engine Models Utilizing 3968475

• 15N CM2380 M104B
• 4B3.9, B5.9 GAS PLUS CM556
• G5.9 CM558
• G8.3, G8.3 CM558
• G855 CM558
• GTA38 G CMEICS G116C
• GTA8.3 CM558
• GTA855 CM558 (CM2358) G101
• ISB (Chrysler)
• ISB CM2150
• ISB5.9 CM2880 B149
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118
• ISG12 G CMOH6.0 G111
• ISL G CM2180
• L8.9 L121
• QSB6.7 CM2250
• QSK19 CM2350 K105
• QSK19 CM2350 K114
• QSK45 CM500
• QSK60 CM500
• QSL9 G CM558

Application and Importance

The 3968475 screw is typically used in applications requiring robust fastening solutions. Its design allows for secure attachment of various engine components, ensuring that parts remain tightly fastened under operational stresses. This screw’s flange head provides a larger surface area for better torque application, while the hexagon shape facilitates easier and more efficient use of tools during assembly and maintenance.

Grouping of Engines

The engines listed above can be grouped based on their series and applications:

• Industrial and Commercial Engines:
  • 15N CM2380 M104B
  • 4B3.9, B5.9 GAS PLUS CM556
  • G5.9 CM558
  • G8.3, G8.3 CM558
  • G855 CM558
  • GTA38 G CMEICS G116C
  • GTA8.3 CM558
  • GTA855 CM558 (CM2358) G101
  • ISB (Chrysler)
  • ISB CM2150
  • ISB5.9 CM2880 B149
  • ISB6.7 CM2250
  • ISB6.7 CM2350 B101
  • ISB6.7 G CM2180 B118
  • ISG12 G CMOH6.0 G111
  • ISL G CM2180
  • L8.9 L121
  • QSB6.7 CM2250
  • QSK19 CM2350 K105
  • QSK19 CM2350 K114
  • QSK45 CM500
  • QSK60 CM500
  • QSL9 G CM558

Each of these engines, while differing in specific configurations and applications, relies on the 3968475 screw for critical fastening tasks. This ensures that the engine components are held securely, contributing to the overall performance and longevity of the engine.

Understanding the Role of Part 3968475 Hexagon Flange Head Cap Screw in Engine Systems

The Part 3968475 Hexagon Flange Head Cap Screw is instrumental in securing various components within engine systems, ensuring stability and integrity across different assemblies. Its application spans multiple critical areas, enhancing the functionality and reliability of the engine.

Securing the Crankcase and Breather System

In the crankcase breather plumbing, the Hexagon Flange Head Cap Screw plays a significant role in fastening the breather to the crankcase. This connection is vital for maintaining the proper ventilation of the crankcase, which helps in managing pressure and preventing the buildup of contaminants.

Integration with the Fuel Control Module and Governor

The screw is also used in the fuel control module and governor assemblies. By securing the electronic components within these modules, it ensures that the electronic signals are transmitted accurately and consistently. This is particularly important for the governor, which relies on precise electronic feedback to regulate engine speed and performance.

Harnessing Electronic Control Module Wiring

Within the electronic control module wiring, the Hexagon Flange Head Cap Screw is employed to secure the harness connections. This ensures that the electrical connections remain intact, reducing the risk of loose wires that could lead to intermittent signals or complete failure of the electronic control system.

Manifold and Air Intake Stability

In the manifold and air intake systems, the screw helps in fastening components that are subject to vibrations and thermal expansions. Its robust design ensures that the manifold and air intake remain securely attached, contributing to consistent airflow and combustion efficiency.

Fuel Supply and Injection System

The injector fuel supply tube and the overall fuel injection system benefit from the secure fastening provided by the Hexagon Flange Head Cap Screw. It ensures that fuel lines and injectors are held firmly in place, which is essential for maintaining fuel pressure and delivery accuracy.

Engine Control and Module Assemblies

In engine control and module assemblies, the screw is used to fasten various components, including the engine control module and fuel control module. This ensures that these modules remain securely mounted, which is crucial for their operational stability and durability.

Valve Cover and Service Kit Applications

Lastly, the Hexagon Flange Head Cap Screw is often found in valve cover assemblies and service kits. It secures the valve cover to the engine block, ensuring a seal that prevents oil leaks and contaminants from entering the engine. In service kits, it is used to reassemble components after maintenance, ensuring that all parts are correctly and securely fastened.

Conclusion

Overall, the Part 3968475 Hexagon Flange Head Cap Screw is a versatile fastener that enhances the reliability and performance of various engine components. Its application across different systems underscores its importance in maintaining the structural and functional integrity of the engine.