4900749
Hexagon Head Cap Screw
Cummins®

Introduction

The Cummins 4900749 Hexagon Head Cap Screw is a specialized fastener designed for heavy-duty truck applications. It ensures secure and reliable fastening in various truck components, contributing to vehicle performance and durability.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw features a hexagonal head for easy tightening and loosening with a wrench or socket. Its threaded design allows it to be driven into materials, providing a secure hold. The hexagonal head ensures precise manipulation, reducing slippage and damage risks ¹.

Purpose and Role in Truck Operation

The 4900749 Hexagon Head Cap Screw is vital for heavy-duty trucks, used in engine mounts, chassis assemblies, and body panels. It maintains structural integrity and alignment of critical parts, ensuring optimal performance and safety ².

Key Features

This Cummins part is made from high-strength materials like alloy steel, offering excellent wear and fatigue resistance. It features a fine thread design for precise adjustments and secure fastening. The hexagonal head is compatible with standard tools, facilitating easy installation and removal.

Benefits

Using the 4900749 Hexagon Head Cap Screw offers improved fastening strength due to its high-strength material and fine thread design. Its corrosion-resistant properties protect it from harsh environments. The hexagonal head allows for easy manipulation with standard tools, streamlining the installation and removal process ³.

Installation Guidelines

Proper installation of this part is crucial for secure fastening. Ensure mating surfaces are clean, drive the screw into the designated location with even pressure, and torque it to the manufacturer’s specified value to avoid overtightening.

Troubleshooting and Maintenance

Common issues include loosening due to vibration or thermal expansion. Inspect screws periodically, retighten as necessary, and use thread lockers or anti-seize compounds to prevent loosening. Regular maintenance practices prolong screw lifespan and ensure reliable performance.

Safety Considerations

Use appropriate tools and apply torque values according to manufacturer specifications to prevent overtightening. Wear personal protective equipment like gloves and safety glasses to protect against potential injuries during installation and removal.

Cummins Overview

Cummins Inc. designs, manufactures, and distributes engines, filtration, and power generation products. With a century-long history, Cummins is a trusted name in the automotive and heavy-duty truck industry, committed to quality and innovation. The 4900749 Hexagon Head Cap Screw exemplifies Cummins’ dedication to excellence in heavy-duty applications.

Application in Cummins Engines

The 4900749 screw is crucial in assembling and maintaining various Cummins engines. It provides robust fastening capabilities, ensuring engine components remain securely attached under high operational stresses.

Application in A1400 and A1700 Engines

In A1400 and A1700 engines, the 4900749 screw fastens cylinder heads, intake manifolds, and exhaust manifolds to the engine block, ensuring alignment and structural integrity for optimal engine performance.

Grouping by Function

• Cylinder Head Fastening: Secures the cylinder head to the engine block, preventing leaks and ensuring proper sealing.
• Manifold Attachment: Attaches intake and exhaust manifolds, vital for air and exhaust management.
• General Assembly: Used in various other assembly points requiring secure fastening.

Importance of Material and Design

Made from high-strength materials, the 4900749 screw withstands high temperatures and pressures. Its hexagonal head allows for efficient tightening and loosening with standard tools, facilitating maintenance and repair.

Reliability and Durability

The precision manufacturing of the 4900749 screw ensures it meets stringent engine assembly requirements, contributing to the overall robustness of Cummins engines.

Role in Plumbing and Fuel Systems

Plumbing Systems

In plumbing systems, the 4900749 Hexagon Head Cap Screw secures pipe fittings, valves, and other critical components, ensuring system integrity and functionality. Its design allows for a secure and tight fit, preventing leaks and maintaining pressure within plumbing lines.

Fuel Systems

Within fuel systems, the 4900749 Hexagon Head Cap Screw assembles and secures fuel lines, filters, and injectors. It ensures firm attachment of all components, vital for the safe and efficient operation of the fuel system. The screw maintains the structural integrity of fuel lines, preventing detachment and potential fuel leaks.

Conclusion

The Cummins 4900749 Hexagon Head Cap Screw is a critical component in heavy-duty truck applications, ensuring secure fastening and maintaining the structural integrity of various truck components. Its high-strength material, fine thread design, and hexagonal head make it ideal for demanding environments. Proper installation, regular maintenance, and adherence to safety considerations are essential for optimal performance and longevity.