100129
Socket Head Cap Screw
Cummins®

The Cummins Socket Head Cap Screw 100129 is a specialized fastener designed for use in commercial truck operations. This screw is engineered to provide secure fastening in various truck components, ensuring structural integrity and reliable performance. This document outlines the purpose, key features, and role of this part in truck operations, along with basic concepts of socket head cap screws and maintenance guidelines.

Basic Concepts of Socket Head Cap Screws

A Socket Head Cap Screw is a type of fastener characterized by its cap head and hex socket drive. This design allows for easy installation and removal using a hex key, making it a popular choice for various applications ³. Socket head cap screws are typically made from materials such as alloy steel, stainless steel, or brass, depending on the specific requirements of the application. Common sizes range from M1.6 to M64, with thread types including metric and Unified Thread Standard (UTS). The cap head design provides a larger bearing surface, which helps distribute the load more evenly and reduces the risk of damage to the fastened material ¹.

Purpose of Socket Head Cap Screw 100129

The Socket Head Cap Screw 100129 by Cummins is designed to play a specific role in truck operations. It is typically used in areas where secure fastening is required, such as in the truck’s frame, engine components, and other critical structures. The screw ensures that parts remain firmly attached, contributing to the overall safety and performance of the vehicle. Its design allows for efficient torque application, which is crucial in maintaining the integrity of the fastened components under various operating conditions ².

Key Features

The Socket Head Cap Screw 100129 features a hex socket drive, which allows for easy installation and removal using a hex key. The cap head design provides a larger bearing surface, which helps distribute the load more evenly and reduces the risk of damage to the fastened material. The screw is made from high-quality materials, ensuring it has high tensile strength and resistance to corrosion. These features contribute to its performance and durability in heavy-duty applications, making it suitable for the demanding conditions encountered in commercial truck operations.

Benefits

The Socket Head Cap Screw 100129 offers several benefits, including high tensile strength, which allows it to withstand significant loads without deforming. Its resistance to corrosion ensures longevity, even in harsh operating environments. The ease of installation and removal using a hex key makes it a convenient choice for maintenance and repair tasks. Additionally, the cap head design provides a secure fastening solution that helps maintain the structural integrity of the truck’s components.

Troubleshooting and Maintenance

Common issues with Socket Head Cap Screws include loosening due to vibration or thermal expansion and corrosion in harsh environments. To troubleshoot loosening, ensure that the screw is properly torqued during installation and consider using lock washers or thread-locking compounds to enhance security. For corrosion, regular inspection and cleaning can help prevent buildup. Applying a protective coating or using screws made from corrosion-resistant materials can also extend their lifespan. Regular maintenance, including checking for signs of wear or damage, ensures the longevity and reliable performance of the Socket Head Cap Screw 100129 ³.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins is committed to quality and innovation in the automotive industry. The company offers a wide range of products designed to meet the needs of various industries, including commercial trucking, construction, and agriculture. Cummins’ commitment to excellence is reflected in its high-quality components, such as the Socket Head Cap Screw 100129, which are engineered to deliver reliable performance in demanding applications.

Compatibility with Cummins Engines

The Socket Head Cap Screw 100129 is a versatile component that fits a wide range of Cummins engines. This part is designed to provide secure fastening in various engine configurations, ensuring reliable performance and durability.

ISM Series Engines

• ISM CM570
• ISM CM570/870
• ISM CM876
• ISM11 CM876 SN

The ISM series engines utilize the Socket Head Cap Screw 100129 in several critical applications. This screw is often used in securing engine components, ensuring that parts remain tightly fastened under operational stresses.

ISX Series Engines

• ISX CM570
• ISX CM870
• ISX CM871

The ISX series engines benefit from the use of the Socket Head Cap Screw 100129. This screw is integral in maintaining the structural integrity of the engine by securing various components, including those in the cylinder head and other critical areas.

K Series Engines

• K19
• K38
• K50

The K series engines incorporate the Socket Head Cap Screw 100129 in their design. This screw is essential for fastening components that require a robust and reliable connection, ensuring the engine operates smoothly and efficiently.

M11 Series Engines

• M11 CELECT
• M11 CELECT PLUS

The M11 CELECT and M11 CELECT PLUS engines utilize the Socket Head Cap Screw 100129 in various applications. This screw is crucial for securing components in these engines, contributing to their overall performance and longevity.

N14 Series Engines

• N14 CELECT
• N14 CELECT PLUS
• N14 MECHANICAL

The N14 series engines incorporate the Socket Head Cap Screw 100129. This screw is used in securing various engine components, ensuring that the engine maintains its structural integrity and operates reliably.

QSK/QSK19 Series Engines

• QSK19 CM500

The QSK19 CM500 engine uses the Socket Head Cap Screw 100129 in several critical applications. This screw is essential for fastening components that require a secure and reliable connection, ensuring the engine operates efficiently.

QSM/QSNT Series Engines

• QSM11 CM570
• QSM11 CM876
• QSN14 CM876 N103
• QSNT14 CM876 N102

The QSM11 CM570, QSM11 CM876, QSN14 CM876 N103, and QSNT14 CM876 N102 engines utilize the Socket Head Cap Screw 100129 in various applications. This screw is crucial for securing components in these engines, contributing to their overall performance and longevity.

Other Engines

• L10 CELECT
• NH/NT 855
• V28

The L10 CELECT, NH/NT 855, and V28 engines also incorporate the Socket Head Cap Screw 100129 in their design. This screw is essential for fastening components in these engines, ensuring that they maintain their structural integrity and operate reliably.

Role of Part 100129 in Engine Systems

Part 100129, the Socket Head Cap Screw, is integral to the assembly and securement of various components within engine systems. Its application spans across multiple subsystems, ensuring the structural integrity and operational efficiency of the engine.

Actuator Mounting

In actuator mountings, the Socket Head Cap Screw secures the actuator to the engine frame or other mounting surfaces. This ensures precise control over engine functions, such as valve timing and fuel injection, by maintaining the actuator’s alignment and stability.

Fuel Pump and Related Components

The screw is extensively used in the assembly of fuel pumps, including the Celect fuel pump, fuel base pump, and fuel gear pump. It fastens the pump housing to the engine block or fuel system framework, ensuring a leak-proof seal and stable operation. Additionally, it secures the fuel pump gear housing and the fuel pump stand audit kit, critical for maintaining the pump’s internal components in proper alignment.

Engine Installation Kit

Within the engine installation kit, the Socket Head Cap Screw plays a role in attaching various engine components to the chassis or engine bay. This includes securing the fuel code and fuel pump sub-option, ensuring that all fuel-related components are firmly in place and correctly oriented.

Gear Pump and Mounting

For gear pumps, the screw is used in the gear pump mounting and gear pump housing to secure the pump to its mounting bracket. This is essential for the pump’s operation, as it ensures that the gears within the pump remain aligned and function smoothly.

Injector Nozzle and Valves

The screw is also employed in the securement of injector nozzles and fuel shutoff valves. By fastening these components to the engine block or fuel rail, it ensures that fuel delivery is consistent and that the valves operate correctly to regulate fuel flow.

Performance and Calibration Components

In performance and calibration components, such as the pump fuel variable speed and uncalibrated auto pump, the Socket Head Cap Screw ensures that all adjustable components are securely fastened. This is vital for maintaining the engine’s performance parameters and ensuring that any calibrations made are preserved during operation.

Miscellaneous Applications

The screw is also found in the assembly of the non-AFC auto FP/WW sump and the PDC kit, where it secures various parts and ensures the structural integrity of these components. Its use in these applications highlights its versatility and importance in engine system assemblies.

Overall, the Socket Head Cap Screw (Part 100129) is a fundamental fastener in engine systems, contributing to the securement and alignment of a wide range of components. Its reliable performance under various operational conditions makes it an indispensable part in the assembly and maintenance of engine systems.

Conclusion

The Cummins Socket Head Cap Screw 100129 is a critical component in commercial truck operations, providing secure fastening in various truck and engine components. Its design, featuring a hex socket drive and cap head, ensures easy installation, high tensile strength, and resistance to corrosion. Regular maintenance and proper installation techniques are essential to ensure the longevity and reliable performance of this part. The Socket Head Cap Screw 100129 is compatible with a wide range of Cummins engines, playing a vital role in maintaining the structural integrity and operational efficiency of these engines.