3936643
Hexagon Flange Head Cap Screw
Cummins®

Introduction

The Hexagon Flange Head Cap Screw, identified by part number 3936643, is a component manufactured by Cummins, a well-established name in the automotive and heavy-duty truck industry. This screw plays a role in the assembly and maintenance of commercial trucks, ensuring the secure fastening of various components.

Basic Concepts

A Hexagon Flange Head Cap Screw is a type of fastener characterized by a hexagonal head and a flange that sits against the surface being fastened. This design allows for efficient tightening using a wrench or socket and provides a larger bearing surface, which helps distribute loads more evenly. In mechanical assemblies, these screws are commonly used to join metal parts, providing both strength and stability to the structure ¹.

Purpose and Role in Truck Operation

In the context of commercial trucks, the 3936643 Hexagon Flange Head Cap Screw serves to securely fasten components that are subject to significant stress and vibration. Its role is vital in maintaining the integrity of truck assemblies, contributing to the overall operation and longevity of the vehicle. By ensuring that parts remain firmly attached, this screw helps prevent issues that could arise from loosening or separation under dynamic conditions ².

Key Features

The 3936643 Hexagon Flange Head Cap Screw is designed with several features that enhance its performance and durability. Its hexagonal head allows for easy and precise tightening, while the flange provides additional surface area to distribute loads. The screw is typically made from high-strength materials, ensuring it can withstand the rigors of commercial truck use. Additionally, its design may include features such as a corrosion-resistant coating to prolong service life in harsh environments.

Benefits

Utilizing the 3936643 Hexagon Flange Head Cap Screw offers several advantages. The flange design aids in improved load distribution, reducing the risk of damage to the fastened surfaces. Its hexagonal head ensures secure fastening, minimizing the likelihood of loosening due to vibration. Furthermore, the material composition and possible coatings contribute to its resistance against corrosion and wear, enhancing the screw’s durability in demanding applications.

Installation and Usage

Proper installation of the 3936643 Hexagon Flange Head Cap Screw is crucial for optimal performance. It is recommended to follow torque specifications provided by the manufacturer to ensure the screw is tightened to the correct level, avoiding over-tightening which could lead to damage, or under-tightening which could compromise security. Using the appropriate tools for installation, such as a wrench or socket that fits the hexagonal head, is also important to prevent damage to the screw or the fastening surfaces.

Troubleshooting and Maintenance

Common issues with the 3936643 Hexagon Flange Head Cap Screw may include corrosion or stripping of the head. Regular inspection for signs of wear or damage is recommended to identify potential problems early. Maintenance practices such as cleaning and applying a protective coating can help prolong the screw’s service life. In cases where corrosion is present, it may be necessary to replace the screw to ensure the integrity of the fastening.

Compatibility and Applications

The 3936643 Hexagon Flange Head Cap Screw is commonly used in various applications within commercial trucks. It is suitable for fastening components that require a secure and durable connection, such as engine mounts, chassis parts, and other structural elements. Its design and material make it compatible with a wide range of truck models and applications.

Cummins Overview

Cummins is a renowned manufacturer in the automotive and heavy-duty truck industry, known for its commitment to producing high-quality components. With a history of innovation and excellence, Cummins has established a reputation for reliability and performance. The company’s dedication to quality is evident in its wide range of products, including the 3936643 Hexagon Flange Head Cap Screw, which is designed to meet the demanding requirements of commercial truck applications ³.

Compatibility with Cummins Engines

The Hexagon Flange Head Cap Screw, part number 3936643, is a critical component used in various Cummins engine assemblies. This screw is designed to secure different parts within the engine, ensuring structural integrity and operational efficiency.

B5.6 CM2670 B152B, B6.7 CM2670 B153B, B6.7 CM2670 B164C

The screw is utilized in the B5.6 CM2670 B152B, B6.7 CM2670 B153B, and B6.7 CM2670 B164C engines to fasten various components. These engines, part of the CM2670 series, benefit from the screw’s robust design, which ensures tight and reliable connections in high-stress environments.

F3.8 CM2350 F128C, QSF3.8 CM2350 F107

In the F3.8 CM2350 F128C and QSF3.8 CM2350 F107 engines, the Hexagon Flange Head Cap Screw is employed to secure components within the engine’s framework. These engines, part of the CM2350 series, rely on the screw’s precision and strength to maintain the alignment and stability of critical parts.

ISB CM850, QSB6.7 CM850 (CM2850), QSB6.7 M CM2250

The ISB CM850, QSB6.7 CM850 (CM2850), and QSB6.7 M CM2250 engines also incorporate the Hexagon Flange Head Cap Screw in their assemblies. These engines, which are part of the CM850 and CM2250 series, use the screw to ensure that various engine components are securely fastened, contributing to the overall performance and longevity of the engine.

ISF2.8 CM2220 F129, QSB7 CM2880 B117, QSK95 CM2350 K113

Lastly, the ISF2.8 CM2220 F129, QSB7 CM2880 B117, and QSK95 CM2350 K113 engines utilize the Hexagon Flange Head Cap Screw to fasten components within their respective frameworks. These engines, part of the CM2220, CM2880, and CM2350 series, depend on the screw’s durability and precision to maintain the integrity of their assemblies.

Role in Engine Systems

The 3936643 Hexagon Flange Head Cap Screw is instrumental in securing various components within engine systems, ensuring stability and proper function. This screw is commonly used in the assembly and maintenance of several key engine parts.

Block and Cylinder Assembly

In the block and cylinder assembly, the Hexagon Flange Head Cap Screw is utilized to fasten components securely. It ensures that the cylinder head is tightly sealed against the engine block, preventing any leaks and maintaining compression integrity.

Breather and Crankcase Systems

For the breather and crankcase systems, this screw plays a role in attaching the crankcase breather to the engine block. It helps in managing the ventilation of the crankcase, allowing for the release of gases and moisture that accumulate during engine operation.

Connection and Exhaust Outlet

When it comes to connections and the exhaust outlet, the Hexagon Flange Head Cap Screw is employed to secure the exhaust manifold to the engine block. This ensures that the exhaust gases are directed efficiently away from the engine, contributing to the overall performance and emissions control.

Electronic Control Module (ECM) and Wiring Harness

In the electronic control module (ECM) bracket and harness, this screw is vital for mounting the ECM securely within the engine compartment. It also aids in fastening the ECM wiring harness, ensuring that all electronic connections are stable and reliable.

Engine Control Wiring and Module

For the engine control wiring and module, the Hexagon Flange Head Cap Screw is used to attach the engine control module to its designated location. This secure attachment is essential for the module to function correctly, providing precise control over engine operations.

Piston Cooling Nozzle and Plumbing

In the piston cooling nozzle and plumbing systems, this screw helps in securing the nozzles and plumbing components. It ensures that the cooling system operates efficiently, maintaining optimal engine temperature and preventing overheating.

Turbocharger and Speed Sensor Kit

For the turbocharger and speed sensor kit, the Hexagon Flange Head Cap Screw is used to attach the turbocharger to the engine and secure the speed sensor. This ensures accurate monitoring of turbocharger speed and efficient performance of the turbocharger system.

Turbocharger Gasket Kit and Plumbing

Finally, in the turbocharger gasket kit and plumbing, this screw is essential for sealing and securing the turbocharger components. It ensures that the turbocharger operates within specified parameters, enhancing engine performance and reliability.

Conclusion

The 3936643 Hexagon Flange Head Cap Screw by Cummins is a critical component in the assembly and maintenance of commercial trucks and various Cummins engines. Its design, featuring a hexagonal head and flange, ensures efficient tightening and load distribution, contributing to the stability and longevity of the fastened components. The screw’s compatibility with a wide range of applications and its role in securing key engine parts underscore its importance in maintaining the integrity and performance of commercial vehicles.