3103425
Twelve Point Cap Screw
Cummins®

Introduction

The Cummins 3103425 Twelve Point Cap Screw is a specialized fastener designed for use in commercial trucks. It provides secure and reliable fastening in various truck components, ensuring the integrity and safety of the vehicle during operation. This screw is particularly valued in the trucking industry for its robustness and ability to withstand demanding conditions encountered in heavy-duty applications ².

Basic Concepts of Twelve Point Cap Screws

A twelve point cap screw is characterized by its hexagonal socket head, which allows for increased torque application compared to traditional hex-head screws. This design reduces the risk of cam-out and provides a more secure grip. Twelve point cap screws are commonly used in mechanical assemblies where high torque and resistance to loosening are required ³.

Role and Function in Truck Operation

The Cummins 3103425 Twelve Point Cap Screw secures critical components subject to vibration and stress, such as engine mounts, transmission housings, and chassis assemblies. By providing a strong and stable connection, this screw contributes to the overall functionality and safety of the vehicle, ensuring that components remain securely fastened under various operating conditions ⁴.

Key Features

The Cummins 3103425 Twelve Point Cap Screw features a robust design with a twelve-sided socket head for enhanced torque application. It is typically made from high-strength materials, such as alloy steel, to ensure durability and resistance to wear. The screw’s unique attributes, such as its corrosion-resistant coating and precise threading, enhance its performance and longevity in harsh environments ¹.

Benefits of Using Cummins Twelve Point Cap Screws

Using Cummins Twelve Point Cap Screws offers several advantages. These screws provide increased torque capacity, allowing for tighter and more secure fastening. They also exhibit resistance to loosening, which is crucial in applications where vibrations are common. Additionally, their durability in harsh operating conditions ensures long-term reliability and reduced maintenance requirements ².

Installation Guidelines

Proper installation of the Cummins 3103425 Twelve Point Cap Screw involves several steps to ensure secure and effective fastening. Begin by cleaning the mating surfaces to remove any debris or corrosion. Use a torque wrench to apply the specified torque, ensuring that the screw is tightened to the manufacturer’s recommended settings. It is important to follow best practices, such as using the correct socket size and avoiding over-tightening, to prevent damage to the fastener or the component being secured ³.

Troubleshooting Common Issues

Common issues associated with twelve point cap screws include stripping and corrosion. Stripping can occur if the screw is over-tightened or if the wrong socket size is used. To address this, ensure that the correct torque specifications are followed and that the appropriate socket is utilized. Corrosion can be mitigated by applying a corrosion-resistant coating or lubricant during installation and by regularly inspecting the screws for signs of wear or damage ⁴.

Maintenance Tips

Regular maintenance of twelve point cap screws is important to prolong their service life and ensure continued reliable performance. This includes periodic inspection for signs of wear, corrosion, or loosening. If any issues are detected, the screws should be tightened or replaced as necessary. Additionally, keeping the mating surfaces clean and free of debris will help maintain the integrity of the fastening ¹.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history of innovation and quality, Cummins has established a strong reputation in the commercial truck industry. The company is committed to providing reliable and high-performance products that meet the demanding needs of its customers, ensuring that their vehicles operate efficiently and safely ².

Twelve Point Cap Screw 3103425 in Cummins Engines

The Twelve Point Cap Screw 3103425, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is integral to the assembly and maintenance of several engine parts, ensuring structural integrity and operational efficiency.

ISM Series Engines

In the ISM series, the screw is utilized in the ISM CM570 and ISM CM570/870 engines. These engines are known for their robust design and are commonly used in heavy-duty applications. The cap screw plays a vital role in securing various engine components, ensuring they remain tightly fastened during operation ³.

ISM11 Series Engines

The ISM11 CM876 SN engine also incorporates the 3103425 screw. This engine variant is designed for high-performance applications, and the cap screw’s role is crucial in maintaining the structural integrity of the engine under demanding conditions ⁴.

M11 Series Engines

The M11 CELECT, M11 CELECT PLUS, and M11 MECHANICAL engines all feature the 3103425 screw. These engines are known for their versatility and reliability in a range of applications. The cap screw is essential in securing various parts, ensuring the engine operates smoothly and efficiently ¹.

N14 Series Engines

The N14 G and N14 MECHANICAL engines also use the 3103425 screw. These engines are designed for heavy-duty use and require robust components to withstand the rigors of their applications. The cap screw’s role in these engines is critical for maintaining the engine’s structural integrity ².

QSM and QSNT Series Engines

The QSM11 CM570, QSNT14 CM876 N102, and QSNT14 CM876 N103 engines incorporate the 3103425 screw. These engines are engineered for high-performance and reliability, and the cap screw is essential in ensuring the engine components remain securely fastened ³.

NH/NT Series Engines

The NH/NT 855 engine also utilizes the 3103425 screw. This engine is designed for heavy-duty applications and requires components that can withstand significant stress and wear. The cap screw’s role in this engine is crucial for maintaining the engine’s structural integrity and ensuring smooth operation ⁴.

Role of Part 3103425 Twelve Point Cap Screw in Engine Systems

The part 3103425 Twelve Point Cap Screw is instrumental in securing and maintaining the integrity of various engine components.

In the flywheel housing, this cap screw ensures a robust connection, preventing any misalignment or movement that could affect the engine’s balance and performance. Its twelve-point design allows for more precise torque application, reducing the risk of rounding off the screw head during tightening ¹.

For the mounting of the engine, the Twelve Point Cap Screw provides a stable and secure attachment point. This is essential for maintaining the engine’s position within the vehicle’s frame, ensuring that vibrations and stresses are adequately managed without compromising the engine’s structural integrity ².

In the starting motor assembly, the Twelve Point Cap Screw plays a key role in attaching the motor to the engine block. This secure attachment is vital for the reliable operation of the starting system, ensuring that the motor can deliver consistent torque to crank the engine without any risk of detachment or failure ³.

Overall, the part 3103425 Twelve Point Cap Screw is a fundamental component in ensuring the secure and efficient operation of these engine systems ⁴.

Conclusion

The Cummins 3103425 Twelve Point Cap Screw is a vital component in the commercial trucking industry, providing secure and reliable fastening for various truck and engine components. Its robust design, high torque capacity, and resistance to loosening make it an essential part for maintaining the integrity and safety of commercial vehicles. Proper installation, regular maintenance, and understanding its role in engine systems are crucial for ensuring the longevity and performance of this critical fastener.