3086121
Round Head Cap Screw
Cummins®

The 3086121 Round Head Cap Screw is a specialized fastener produced by Cummins, a renowned manufacturer in the automotive industry. This screw is designed for use in commercial trucks, where it plays a significant role in ensuring the integrity and functionality of various truck components. Cummins is well-known for its commitment to quality and innovation, making this screw a reliable choice for heavy-duty applications.

Basic Concepts of Round Head Cap Screws

A Round Head Cap Screw is a type of fastener characterized by its rounded head and threaded body. It is commonly used in fastening applications where a countersunk head is required to allow the screw to sit flush with or below the surface of the material being fastened. Mechanically, the screw functions by converting torque applied to the head into tension along the thread, securing the components together ¹.

Purpose of the 3086121 Round Head Cap Screw in Truck Operations

The 3086121 Round Head Cap Screw is integral to the operation and maintenance of commercial trucks. It is utilized in various truck components, including engine mounts, chassis assemblies, and body panels. By providing a secure and durable fastening solution, this screw helps maintain the structural integrity and performance of the truck ².

Key Features of the 3086121 Round Head Cap Screw

The 3086121 Round Head Cap Screw is designed with several key features that enhance its performance and reliability. It is constructed from high-quality materials, ensuring durability and resistance to wear. The screw features a specific thread type that provides optimal grip and holding power. Additionally, the rounded head design allows for easy installation and a clean, professional finish.

Benefits of Using the 3086121 Round Head Cap Screw

Using the 3086121 Round Head Cap Screw offers several advantages. Its durable construction ensures long-lasting performance, even under demanding conditions. The screw’s corrosion-resistant properties make it suitable for use in various environments. Furthermore, its design allows for easy installation, reducing the time and effort required during maintenance procedures.

Installation Guidelines

Proper installation of the 3086121 Round Head Cap Screw is crucial for ensuring optimal performance and longevity. Begin by selecting the appropriate size and type of screw for the application. Use a torque wrench to apply the recommended torque specifications, ensuring the screw is tightened to the correct level without over-tightening. Verify that the screw is seated properly and that the head is flush with the surface.

Maintenance and Troubleshooting

Regular maintenance of the 3086121 Round Head Cap Screw is important to ensure continued performance. Inspect the screw periodically for signs of wear or damage. Clean the screw and surrounding area to remove any debris or corrosion. If the screw becomes loose, re-tighten it to the specified torque. In case of damage, replace the screw with a new one to maintain the integrity of the fastening.

Compatibility and Applications

The 3086121 Round Head Cap Screw is compatible with a wide range of truck models and components. Its versatile design makes it suitable for various fastening applications within the truck industry. Whether used in engine components, chassis assemblies, or body panels, this screw provides a reliable fastening solution.

Safety Considerations

When working with the 3086121 Round Head Cap Screw, it is important to follow safety precautions and best practices. Handle the screw carefully to avoid injury. Store it in a dry, secure location to prevent damage. Dispose of any damaged or unused screws according to local regulations to ensure environmental safety.

Cummins: Manufacturer Overview

Cummins Inc. is a leading manufacturer in the automotive industry, known for its high-quality products and innovative solutions. With a strong reputation for reliability and performance, Cummins has been a trusted name in the industry for many years. The company’s commitment to quality and customer satisfaction is evident in its wide range of products, including the 3086121 Round Head Cap Screw ³.

Cummins Round Head Cap Screw 3086121 in Engine Applications

The Cummins Round Head Cap Screw part number 3086121 is a critical component in several engine configurations. This part is designed to secure various engine parts, ensuring stability and reliability during operation. Below is a detailed overview of how this screw fits into different engine models.

K19 Series

The K19 engine series utilizes the 3086121 screw in several applications. This screw is typically used to fasten components that require precise alignment and secure fastening, such as cylinder heads and other critical engine assemblies.

KTA19GC Series

In the KTA19GC engines, the 3086121 screw is employed in configurations such as the KTA19GC CM558. Here, it is used to secure various engine parts, ensuring that they remain tightly fastened under operational stresses.

QSK19 Series

The QSK19 engines, including models like QSK19 CM2350 K105, QSK19 CM2350 K114, QSK19 CM2350 K144G, QSK19 CM500, QSK19 CM850 MCRS, and QSK19G, all feature the 3086121 screw in their construction. This screw is integral to securing components such as the cylinder heads, valve covers, and other critical assemblies, ensuring the engine’s structural integrity and performance.

QSK45 Series

The QSK45 CM500 engine also incorporates the 3086121 screw. This part is used to fasten various engine components, ensuring they remain securely in place under the high operational stresses typical of this engine model.

By using the 3086121 screw in these engines, Cummins ensures that all parts are fastened securely, contributing to the overall reliability and performance of the engine.

Role of Part 3086121 Round Head Cap Screw in Engine Systems

The part 3086121 Round Head Cap Screw is instrumental in securing various components within engine systems, ensuring their stability and proper function.

In the cover assembly, this screw plays a significant role in maintaining the integrity of the cover by securing it firmly in place. This is essential for protecting internal engine components from external contaminants and ensuring a sealed environment.

When it comes to the front gear, the Round Head Cap Screw is used to fasten the gear to its housing. This secure attachment is vital for the gear’s precise operation, which is necessary for the smooth transfer of power within the engine.

The pulley system also benefits from the use of this screw. By securing the pulley to its shaft, the screw ensures that the pulley operates with minimal wobble, which is important for the efficient operation of the accessory drive systems.

In the accessory drive setup, the Round Head Cap Screw is employed to attach various components such as tensioners and idlers. This secure attachment is necessary for maintaining the correct tension on belts and chains, which is essential for the reliable operation of accessories like the alternator and air conditioning compressor.

For the pump, particularly the water pump, this screw is used to attach the pump housing to the engine block. A secure attachment is necessary to prevent leaks and ensure efficient coolant circulation, which is vital for engine cooling.

The support structures within the engine, such as brackets and mounts, often utilize the Round Head Cap Screw to ensure they are firmly attached to the engine frame. This is important for maintaining the structural integrity of the engine and supporting various components under operational stress.

In the front engine area, where multiple components converge, the Round Head Cap Screw is used extensively to secure covers, brackets, and other attachments. This ensures that all front-end components are held in place, contributing to the overall stability and performance of the engine.

Lastly, in the timing indicator system, the screw is used to attach the indicator to the engine block or timing cover. This secure attachment is necessary for accurate timing readings, which are essential for proper engine operation and maintenance.

Conclusion

The 3086121 Round Head Cap Screw is a critical component in the automotive industry, particularly for commercial trucks and various engine configurations. Its durable construction, corrosion-resistant properties, and easy installation make it a reliable choice for heavy-duty applications. Proper installation, regular maintenance, and adherence to safety guidelines ensure the longevity and performance of this screw, contributing to the overall reliability and efficiency of the vehicles it is used in.