4308861
Hexagon Head Cap Screw
Cummins®

The Cummins Hexagon Head Cap Screw, part number 4308861, is a critical component in the maintenance and operation of commercial trucks. Cummins, a leader in the commercial truck industry, is renowned for its commitment to quality and innovation. This screw is essential for ensuring the reliable performance of various truck components.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a fastener with a hexagonal head, designed for efficient tightening and loosening using a wrench or socket. In the automotive industry, these screws are commonly used to secure components requiring high torque and resistance to loosening. The hexagonal head provides a stable interface for applying force, while the threaded shaft ensures a secure fit within the corresponding hole ¹.

Purpose of the 4308861 Hexagon Head Cap Screw in Truck Operation

This Cummins part plays a role in the operation and maintenance of commercial trucks by securing various components subject to vibration and stress. Its applications range from fastening engine parts to securing chassis components, ensuring that critical connections remain intact under demanding conditions ².

Key Features of the 4308861 Hexagon Head Cap Screw

The 4308861 Hexagon Head Cap Screw is designed with specific characteristics to enhance its performance. Its hexagonal head shape allows for effective torque application, while the threading is engineered to provide a strong and secure fit. Additionally, the screw may feature special coatings or treatments to improve corrosion resistance and durability, ensuring long-term reliability in various operating environments ³.

Benefits of Using the 4308861 Hexagon Head Cap Screw

This part offers several advantages. Its durable construction and resistance to loosening make it suitable for applications where vibrations are common. The ease of installation and removal, facilitated by its hexagonal head, enhances efficiency during maintenance procedures. Furthermore, its design contributes to the overall reliability and performance of the truck.

Installation and Usage Guidelines

Proper installation of this part involves several steps. Begin by ensuring the mating surfaces are clean and free of debris. Use the appropriate wrench or socket to tighten the screw to the recommended torque settings, which can be found in the vehicle’s maintenance manual. It is important to avoid over-tightening, as this can lead to damage. Regular inspection and maintenance will help ensure the screw remains in optimal condition.

Troubleshooting Common Issues

Common issues with Hexagon Head Cap Screws include loosening, corrosion, and damage. To address loosening, re-tighten the screw to the specified torque settings. Corrosion can be mitigated by applying a protective coating or replacing the screw if necessary. Damage to the screw or its mating surface may require replacement to maintain secure fastening.

Maintenance Tips

To ensure the longevity and reliable performance of the 4308861 Hexagon Head Cap Screw, regular maintenance is recommended. Inspect the screw and its mating surfaces at routine intervals for signs of wear or corrosion. Cleaning the screw and its surroundings can prevent the buildup of contaminants that may affect performance. Following these maintenance practices will help sustain the screw’s functionality over time.

Cummins: A Brief Overview

Cummins Inc. is a leader in the commercial truck industry, with a history of innovation and quality. The company offers a wide range of products, including engines, powertrains, and components, designed to meet the demanding requirements of commercial transportation. Cummins’ commitment to excellence is reflected in its products, which are trusted by professionals worldwide for their reliability and performance.

Hexagon Head Cap Screw 4308861 in Cummins Engines

The Cummins Hexagon Head Cap Screw part number 4308861 is a critical component in several Cummins engine models. This screw is integral to the assembly and maintenance of these engines, ensuring secure fastening and structural integrity.

K19 and K38 Engines

In the K19 and K38 engines, the 4308861 screw is utilized in various applications where a robust and reliable fastening solution is required. These engines, known for their durability and performance, benefit from the precision and strength provided by this screw.

QSK19 CM2350 and QSK19 CM500 Engines

For the QSK19 CM2350 and QSK19 CM500 engines, the 4308861 screw plays a pivotal role in securing components within the engine’s framework. These engines are designed for heavy-duty applications, and the use of this screw ensures that all parts remain tightly fastened under demanding conditions.

QSK19 CM850 MCRS Engine

In the QSK19 CM850 MCRS engine, the 4308861 screw is employed in several critical areas. Given the advanced technology and engineering of this model, the screw’s precision and reliability are essential for maintaining the engine’s performance and longevity.

Each of these engines relies on the 4308861 screw for its specific fastening needs, ensuring that the engine operates smoothly and efficiently.

Role of Part 4308861 Hexagon Head Cap Screw in Engine Systems

The part 4308861 Hexagon Head Cap Screw is integral to the assembly and functionality of various engine components. In the context of the fan pilot spacer, this screw ensures precise alignment and secure attachment, which is essential for the efficient operation of the fan system.

Fan Pilot Spacer

In the fan pilot spacer assembly, the 4308861 Hexagon Head Cap Screw plays a significant role by:

• Securing Components: It fastens the fan pilot spacer to the engine block or other mounting surfaces, ensuring that the fan operates within the correct parameters.
• Maintaining Alignment: The screw helps in maintaining the alignment of the fan pilot spacer, which is vital for the balanced rotation of the fan. This alignment prevents undue stress on the fan blades and the pilot bearing.
• Ensuring Stability: By providing a stable connection, the screw contributes to the overall stability of the fan assembly, reducing the risk of vibrations that could lead to component wear or failure.
• Facilitating Maintenance: The use of a hexagon head allows for easy access and removal during maintenance, enabling engineers and mechanics to quickly disassemble and reassemble the fan system as needed.

The integration of the 4308861 Hexagon Head Cap Screw in these components underscores its importance in maintaining the integrity and performance of engine systems.

Conclusion

The Cummins Hexagon Head Cap Screw, part number 4308861, is a vital component in the maintenance and operation of commercial trucks and Cummins engines. Its design, featuring a hexagonal head and durable construction, ensures secure fastening and resistance to loosening under demanding conditions. Proper installation, regular maintenance, and addressing common issues such as corrosion and damage are essential for sustaining the screw’s functionality. Cummins’ commitment to quality and innovation is evident in the reliable performance of this part, making it a trusted component in the commercial truck industry.