3001811
Twelve Point Cap Screw
Cummins®

Introduction

The Cummins 3001811 Twelve Point Cap Screw is a specialized fastener designed for use in heavy-duty truck components. Its purpose is to provide secure and reliable fastening in demanding applications where traditional hex cap screws may not suffice. The significance of this component lies in its ability to enhance the durability and performance of truck assemblies, ensuring that critical parts remain securely fastened under various operating conditions.

Basic Concepts of Twelve Point Cap Screws

A twelve point cap screw is a type of fastener that features a twelve-sided head, as opposed to the six-sided head of a traditional hex cap screw. This design allows for a greater contact area between the screw and the driving tool, which can reduce the likelihood of cam-out and stripping during installation and removal ¹. Twelve point cap screws are commonly used in mechanical assemblies where high torque and secure fastening are required.

Purpose and Role in Truck Operation

The Cummins 3001811 Twelve Point Cap Screw plays a role in the operation and maintenance of heavy-duty trucks by providing secure fastening in various truck systems. It is often used in applications where components are subjected to high stress and vibration, such as in engine mounts, transmission assemblies, and chassis components. The screw’s design helps to ensure that these critical parts remain firmly in place, contributing to the overall reliability and performance of the truck ².

Key Features

The Cummins 3001811 Twelve Point Cap Screw is characterized by several key features that enhance its performance and durability. Its twelve-sided head design provides increased torque application capabilities and reduces the risk of stripping. The screw is typically made from high-strength materials, such as alloy steel, to withstand the rigors of heavy-duty truck applications. Additionally, the screw may feature a corrosion-resistant coating to protect against environmental factors that could compromise its integrity over time.

Benefits

The Cummins 3001811 Twelve Point Cap Screw offers several benefits in fastening applications. Its unique head design allows for improved torque application, making it easier to install and remove without damaging the screw or the driving tool. The screw’s resistance to stripping ensures that it remains securely fastened even under high stress conditions. Furthermore, the enhanced security provided by the twelve-sided head design helps to prevent loosening due to vibration, which is a common issue in heavy-duty truck applications ³.

Installation Considerations

Proper installation of the Cummins 3001811 Twelve Point Cap Screw is important to ensure its effectiveness and longevity. It is recommended to use the appropriate torque specifications provided by the manufacturer to avoid over-tightening or under-tightening. The use of a twelve-point socket or wrench is advised to engage the screw’s head fully and minimize the risk of cam-out. Additionally, it is important to ensure that the mating surfaces are clean and free of debris to promote a secure and lasting connection.

Troubleshooting and Maintenance

Common issues with twelve point cap screws may include stripping, loosening due to vibration, or corrosion. To troubleshoot these issues, it is important to inspect the screw and the mating surfaces for signs of damage or wear. If stripping occurs, it may be necessary to replace the screw with a new one of the appropriate size and grade. To prevent loosening, ensure that the screw is properly torqued and consider the use of lock washers or thread-locking compounds. Regular maintenance, such as cleaning and inspecting the screw and its surroundings, can help to ensure longevity and reliable performance.

Compatibility and Applications

The Cummins 3001811 Twelve Point Cap Screw is designed for use in heavy-duty truck assemblies where secure and durable fastening is required. It is compatible with a variety of truck components and systems, including engine mounts, transmission assemblies, and chassis components. When selecting a twelve point cap screw for a specific application, it is important to consider the size, grade, and material to ensure compatibility with the other components in the assembly.

Manufacturer Information - Cummins

Cummins is a well-established manufacturer with a strong reputation in the automotive and heavy-duty truck industries. The company has a history of innovation and commitment to quality, producing a wide range of components designed to meet the demanding requirements of heavy-duty applications. Cummins’ focus on research and development ensures that their products, including the 3001811 Twelve Point Cap Screw, are at the forefront of technology and performance in the industry.

Twelve Point Cap Screw 3001811 in Cummins Engines

The Twelve Point Cap Screw 3001811, manufactured by Cummins, is a critical component in several of their engine models. This part is integral to the assembly and maintenance of the engines, ensuring structural integrity and operational efficiency.

Application in Engine Models

• 6B5.9, K19, K38, K50 Engines

The 3001811 cap screw is utilized across the 6B5.9, K19, K38, and K50 engines. Its role in these engines is to secure various components, ensuring they remain tightly fastened during operation. This is crucial for maintaining the alignment and stability of engine parts, which directly impacts the overall performance and longevity of the engine.

• Common Usage

In these engines, the 3001818 cap screw is often found in areas where high-strength fastening is required. This includes securing engine blocks, cylinder heads, and other critical assemblies. The twelve-point design of the screw provides a better grip and more surface contact compared to traditional six-point screws, which helps in preventing stripping and loosening over time.

• Maintenance and Replacement

Regular inspection and replacement of the 3001811 cap screw are essential to ensure that the engine operates smoothly. Any signs of wear, corrosion, or damage to the screw can compromise the engine’s structural integrity, leading to potential failures. Therefore, it is recommended to follow the manufacturer’s guidelines for torque specifications and replacement intervals.

• Compatibility and Specifications

The 3001811 cap screw is designed to meet the stringent requirements of Cummins engines. It is made from high-quality materials that can withstand the harsh operating conditions within the engine. The specifications of the screw, including its length, diameter, and thread pitch, are meticulously chosen to fit the exact needs of the engine components it secures.

By ensuring that the 3001811 cap screw is correctly installed and maintained, engine operators can enhance the reliability and efficiency of their Cummins engines.

Role of Part 3001811 Twelve Point Cap Screw in Engine Systems

The part 3001811 Twelve Point Cap Screw is integral to the assembly and securement of various components within engine systems. Its application spans across multiple critical areas, ensuring the structural integrity and operational efficiency of the engine.

Aftercooler Core

In the aftercooler core, the Twelve Point Cap Screw is used to fasten the core to its housing. This securement is essential for maintaining the structural stability of the aftercooler, which is responsible for cooling the compressed air from the turbocharger before it enters the engine cylinders.

Base Parts

For base parts, the Twelve Point Cap Screw plays a role in attaching the base to the engine block. This connection is vital for the overall stability of the engine, as the base parts often support other components and contribute to the engine’s vibrational dampening.

Camshaft and Camshaft and Gear

In the camshaft and camshaft and gear assemblies, the Twelve Point Cap Screw is employed to secure the camshaft to the engine block and to fasten the gear to the camshaft. This ensures precise timing and smooth operation of the valve train, which is fundamental for engine performance.

Connecting Rod and Piston

Within the connecting rod and piston assembly, the Twelve Point Cap Screw is utilized to secure the connecting rod cap to the rod itself. This connection is critical for maintaining the integrity of the piston’s movement within the cylinder, directly influencing engine power and efficiency.

EBM-Plumbing and Fuel Systems

In EBM-plumbing and fuel systems, including the fuel left bank manifold, fuel manifold, fuel supply plumbing, fuel tube, and fuel tubing, the Twelve Point Cap Screw is used to secure fittings and connections. This ensures a leak-free and secure fuel delivery system, which is essential for consistent engine operation.

Injectors

For injectors, the Twelve Point Cap Screw is instrumental in securing the injector to the engine block or cylinder head. This securement is necessary for maintaining the injector’s alignment and sealing, ensuring precise fuel delivery and combustion.

STC Hoses KTA38C 120T and Step Hoses Kit

In the STC hoses KTA38C 120T and step hoses kit, the Twelve Point Cap Screw is used to fasten hose connections and fittings. This ensures a secure and leak-free connection, which is vital for the efficient transfer of fluids within the engine system.

Oil Connection and Manifolds

Across oil connections and manifolds, including the oil left bank manifold, oil right bank manifold, and oil mounting manifold, the Twelve Point Cap Screw is employed to secure oil lines and fittings. This ensures a reliable oil supply to various engine components, which is essential for lubrication and cooling.

Protective Cover and Rocker Housing

Finally, in the protective cover and rocker housing, the Twelve Point Cap Screw is used to secure these components to the engine. This not only protects internal engine parts but also ensures the structural integrity of the engine’s upper assembly.

The Twelve Point Cap Screw’s role in these components underscores its importance in maintaining the structural integrity, operational efficiency, and overall performance of engine systems.

Conclusion

The Cummins 3001811 Twelve Point Cap Screw is a vital component in the assembly and maintenance of heavy-duty truck engines. Its unique design and high-strength materials ensure secure fastening in demanding applications, contributing to the overall reliability and performance of the engine. Proper installation, maintenance, and replacement of this part are essential to ensure the longevity and efficiency of Cummins engines.