3949967
Socket Head Cap Screw
Cummins®

Introduction

The Socket Head Cap Screw 3949967 is a specialized fastener produced by Cummins, a leading manufacturer in the commercial truck industry. This screw is designed for use in various applications within commercial trucks, ensuring secure and reliable fastening solutions. Cummins is renowned for its high-quality components that contribute to the efficiency and durability of truck operations ¹.

Basic Concepts of Socket Head Cap Screws

Socket Head Cap Screws are a type of fastener characterized by a hexagonal socket in the head, allowing for easy installation and removal using a hex key. These screws are commonly used in mechanical assemblies where a flush surface finish is desired, and they provide a strong, permanent fastening solution. The design of the socket head allows for higher torque application compared to traditional hex-head screws, making them suitable for applications requiring robust fastening ².

Purpose of Socket Head Cap Screw 3949967 in Truck Operations

The Socket Head Cap Screw 3949967 plays a significant role in the operation and maintenance of commercial trucks. It is utilized in various components where secure fastening is crucial, such as engine mounts, chassis assemblies, and other critical truck parts. The screw ensures that components remain firmly in place, contributing to the overall stability and performance of the truck. Its design allows for efficient torque application, which is vital in maintaining the integrity of truck assemblies under varying operational conditions ³.

Key Features

The Socket Head Cap Screw 3949967 is crafted from high-quality materials, ensuring durability and resistance to wear and corrosion. Its design includes a hexagonal socket that provides a larger contact area for the driving tool, enhancing torque application and reducing the risk of cam-out. The screw features a cap head that sits flush with the surface, minimizing protrusion and reducing the likelihood of damage or interference with other components. Additionally, the screw is designed with precise threading to ensure a secure and reliable fit ⁴.

Benefits

Using Socket Head Cap Screws, such as the 3949967 model, offers several advantages. These screws provide improved torque application, allowing for tighter and more secure fastening. Their resistance to loosening ensures that components remain firmly in place, even under dynamic conditions. The ease of installation, thanks to the hexagonal socket, simplifies the fastening process and reduces the time required for maintenance tasks. Furthermore, the flush cap head design minimizes the risk of damage and enhances the aesthetic appeal of the assembly.

Installation and Usage

Proper installation of the Socket Head Cap Screw 3949967 is crucial to ensure optimal performance. It is recommended to use a hex key that matches the size of the screw’s socket to avoid damage. The screw should be tightened to the specified torque settings provided by the manufacturer to achieve the desired fastening strength without over-tightening, which could lead to stripping or damage. Using a torque wrench is advisable to ensure accurate torque application.

Troubleshooting and Maintenance

Common issues with Socket Head Cap Screws include loosening over time due to vibration or dynamic loads. Regular inspection and re-tightening can help maintain the integrity of the fastening. If corrosion is detected, it may be necessary to replace the screw to prevent further degradation. Proper lubrication during installation can also enhance the screw’s performance and longevity. Adhering to recommended maintenance practices will help prolong the lifespan and reliability of the 3949967 model.

Safety Considerations

When handling and installing Socket Head Cap Screws, it is important to follow safety practices to prevent injuries and ensure proper installation. Wearing personal protective equipment, such as gloves and safety glasses, is recommended to protect against potential hazards. Additionally, working in a clean and organized environment reduces the risk of contamination and ensures that tools and components are readily accessible. Proper disposal of any waste materials and adherence to environmental regulations are also important considerations.

Cummins Overview

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 in the commercial truck industry for producing reliable and high-performance components. The company’s extensive product range includes engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of commercial truck operations. Cummins’ commitment to innovation and quality ensures that their products contribute to the efficiency, durability, and safety of trucks worldwide.

Socket Head Cap Screw (Part 3949967) in Cummins Engines

The Socket Head Cap Screw, identified by the part number 3949967, is a critical component in several Cummins engines. This part is designed to provide secure fastening in various engine applications, ensuring that components remain tightly connected and operational.

15N CM2380 M104B

In the 15N CM2380 M104B engine, the Socket Head Cap Screw is used in several key areas where secure fastening is essential. This includes securing various engine covers and housings, ensuring that these parts remain tightly sealed and aligned.

ISB (Chrysler) and ISB CM850

For the ISB (Chrysler) and ISB CM850 engines, the Socket Head Cap Screw is employed in similar capacities. It is used to fasten components such as valve covers, intake manifolds, and other critical engine housings. The screw’s design allows for easy installation and removal, which is crucial during maintenance and repair procedures.

QSB5.9 CM850

In the QSB5.9 CM850 engine, the Socket Head Cap Screw is utilized to secure various engine parts, including the cylinder head and other critical components. Its robust construction ensures that these parts remain securely fastened under the high stresses and temperatures typical of diesel engines.

Grouping of Engines

The Socket Head Cap Screw is a versatile component used across multiple Cummins engines, including the 15N CM2380 M104B, ISB (Chrysler), ISB CM850, and QSB5.9 CM850. Its application in these engines highlights its importance in maintaining the integrity and performance of the engine’s various components.

Role of Part 3949967 Socket Head Cap Screw in Various Engine Systems

The part 3949967 Socket Head Cap Screw is integral to the assembly and functionality of several engine components. Its application ensures secure fastening and reliable operation across different systems.

Adapter Connection

In the adapter connection system, the Socket Head Cap Screw provides a robust fastening solution. It ensures that the adapter remains securely attached to the engine, preventing leaks and maintaining the integrity of the connection under varying operational pressures.

Exhaust Recirculation Water Plumbing

For the exhaust recirculation water plumbing, the Socket Head Cap Screw plays a significant role in securing the plumbing components. This ensures that the water recirculation system operates efficiently, contributing to reduced emissions and improved engine performance.

Fuel System Components

Filter-Fuel and Fuel Filter

In the fuel filter and filter-fuel assemblies, the Socket Head Cap Screw is used to secure the filter housing. This ensures that the filter remains in place and functions correctly, trapping contaminants and providing clean fuel to the engine.

Fuel Filter Assembly Kit

Within the fuel filter assembly kit, the Socket Head Cap Screw is essential for assembling the various components. It ensures that all parts are held firmly in place, allowing for efficient fuel filtration and consistent fuel delivery.

Fuel Filter Location

When installing the fuel filter at its designated location, the Socket Head Cap Screw secures the filter housing to the engine or frame. This prevents movement and ensures that the filter operates within specified parameters.

Fuel Control Module

The fuel control module relies on the Socket Head Cap Screw to attach the module securely to the engine. This ensures stable and precise fuel management, which is vital for optimal engine performance and fuel efficiency.

Fuel Transfer Pump Kit

In the fuel transfer pump kit, the Socket Head Cap Screw is used to fasten the pump housing and other components. This secure attachment is necessary for the pump to function correctly, ensuring consistent fuel transfer and pressure maintenance.

Lift Pump Conversion Kit

For the lift pump conversion kit, the Socket Head Cap Screw is crucial in assembling and securing the conversion components. This ensures that the lift pump operates efficiently, providing the necessary fuel pressure for the engine.

Filter O-Ring & Fastener Kit

The filter o-ring & fastener kit utilizes the Socket Head Cap Screw to secure o-rings and other fasteners in place. This is essential for creating a seal and ensuring that the filter system operates without leaks.

The Socket Head Cap Screw’s role in these components underscores its importance in maintaining the structural integrity and operational efficiency of various engine systems.

Conclusion

The Socket Head Cap Screw 3949967 by Cummins is a vital component in the assembly and maintenance of commercial trucks and various engine systems. Its robust design, ease of installation, and reliable performance make it an essential part for ensuring the secure fastening of critical components. Proper installation, regular maintenance, and adherence to safety practices are crucial for maximizing the lifespan and effectiveness of this Cummins part.