3917729
Fracture Resistant Screw
Cummins®

Introduction

The Fracture Resistant Screw 3917729, manufactured by Cummins, is engineered for use in commercial trucks. This screw ensures the reliability and durability of truck components by providing a secure fastening solution in environments where traditional screws might fail. Its application is crucial in maintaining the integrity of truck assemblies under various operational stresses.

Basic Concepts of Fracture Resistant Screws

Fracture resistant screws are designed to withstand high levels of stress without breaking. Typically constructed from high-strength steel alloys, these screws offer superior tensile strength and resistance to fatigue ¹. Their function is to provide a durable fastening solution in applications where conventional screws may not suffice. The importance of fracture resistance is evident in high-stress environments, where the failure of a fastening component can lead to significant operational issues.

Role of the 3917729 Fracture Resistant Screw in Truck Operation

The 3917729 Fracture Resistant Screw secures critical components in trucks that are subject to vibration, thermal expansion, and mechanical stress. It operates in environments that include under-hood applications, where temperatures can fluctuate widely, and in areas exposed to road debris and moisture. The screw’s ability to maintain integrity under these conditions is vital for the safe and efficient operation of the truck.

Key Features

The 3917729 Fracture Resistant Screw features a threaded shaft and a head configured for easy installation and removal. Its material composition typically involves a high-strength alloy, which contributes to its durability. Unique attributes of this screw may include a special coating to resist corrosion and a design that distributes stress evenly across the thread to prevent fracture.

Benefits

Using the 3917729 Fracture Resistant Screw offers several benefits. Its improved durability ensures a longer service life compared to standard screws. The screw’s resistance to fracture under stress contributes to the overall reliability of truck components, reducing the likelihood of unexpected failures. Additionally, its design enhances the performance of the fastening application, providing a secure hold in demanding conditions.

Troubleshooting and Maintenance

To troubleshoot common issues with the 3917729 Fracture Resistant Screw, it is important to inspect for signs of wear, corrosion, or damage. Regular maintenance includes checking the tightness of the screw and ensuring that it has not loosened due to vibration or thermal cycling. If replacement is necessary, it is recommended to use an identical screw to maintain the intended performance and durability of the fastening application.

About Cummins

Cummins is a company with a long-standing history in the manufacturing of automotive components. Known for its expertise and commitment to quality, Cummins has established itself as a leader in the industry. The company’s focus on innovation and reliability is reflected in its product line, which includes a variety of components designed to enhance the performance and durability of commercial vehicles ².

Compatibility with Cummins Engines

The Fracture Resistant Screw 3917729 is designed to enhance the durability and reliability of various Cummins engine models. This part is engineered to withstand the rigors of engine operation, ensuring long-term performance and safety. Below is a detailed look at the compatibility of this screw with specific Cummins engine models:

6C8.3 Series

• 6C8.3
• C8.3 G

These engines benefit from the enhanced durability provided by the 3917729 screw, ensuring critical components remain securely fastened under high operational stresses.

G8.3 Series

• G8.3
• G8.3 CM558
• GTA8.3 CM558

The G8.3 series engines, including variants with CM558 technology, are equipped with the 3917729 screw to maintain structural integrity and reliability in demanding environments.

ISL G Series

• ISL G CM2180

The ISL G CM2180 engine utilizes the 3917729 screw to secure components that are critical to its operation, ensuring that the engine can handle high loads and stresses.

L Series

• L GAS PLUS CM556
• L8.9G CMOH2.0 L125B
• L9.3 L105

The L series engines, including those with CM556 technology and the L8.9G variant, incorporate the 3917729 screw to enhance the fastening of key components, providing added reliability and longevity.

QSL9 G Series

• QSL9 G CM558

The QSL9 G CM558 engine is another model that relies on the 3917729 screw for securing critical parts, ensuring that the engine maintains its structural integrity and operational efficiency.

By integrating the 3917729 Fracture Resistant Screw into these engine models, Cummins ensures that each component is securely fastened, reducing the risk of failure and enhancing the overall performance and lifespan of the engines.

Role of Part 3917729 Fracture Resistant Screw in Engine Systems

The 3917729 Fracture Resistant Screw is instrumental in securing various components within engine systems, ensuring both stability and durability under operational stress.

Integration with Cylinder Block and Cylinder Head

In the cylinder block, this screw plays a significant role in maintaining the integrity of the assembly by securing critical components such as the cylinder head. The cylinder head, which houses the combustion chamber, relies on secure fastening to prevent any misalignment or movement that could lead to performance issues or damage ³.

Application in Cylinder Block Kit and Repair Kit

When dealing with a cylinder block kit or a repair kit, the 3917729 screw is often used to reassemble the engine components after maintenance or repair. Its fracture-resistant properties ensure that the screws remain intact even under high stress, which is vital for the longevity of the repair.

Use in Fuel Injector and Injector Plumbing

The fuel injector and its plumbing are areas where precise and secure fastening is essential. The 3917729 screw ensures that the injectors are held firmly in place, allowing for accurate fuel delivery and preventing leaks that could affect engine performance.

Securing Injectors and Performance Parts

In high-performance engines, where components are subjected to greater stresses, the 3917729 screw is particularly valuable. It secures injectors and other performance parts, ensuring they remain in optimal position and function efficiently under demanding conditions.

Role in Short Block and Long Block Assemblies

Whether working with a short block or a long block, the 3917729 screw is used to fasten various components, including the head and cylinder. Its reliability under stress makes it a preferred choice for these assemblies, contributing to the overall stability and performance of the engine.

Application in Ford Dealer and Performance Kits

Ford dealers and performance kit providers often specify the use of fracture-resistant screws like the 3917729 to ensure that their products meet high standards of durability and performance. This screw is a common component in these kits, highlighting its importance in maintaining engine integrity.

Conclusion

The 3917729 Fracture Resistant Screw is a key component in the assembly and maintenance of various engine systems, providing the necessary stability and durability required for optimal engine performance. Its integration into Cummins engine models ensures that critical components remain securely fastened, reducing the risk of failure and enhancing the overall performance and lifespan of the engines.