3081551
Twelve Point Cap Screw
Cummins®

The Twelve Point Cap Screw, Part #3081551 by Cummins, is a specialized fastener designed for heavy-duty truck applications. Cummins, a well-established manufacturer in the automotive industry, produces this component to meet the demanding requirements of heavy-duty vehicles. This screw plays a role in the reliability and performance of truck systems.

Basic Concepts of Twelve Point Cap Screws

A Twelve Point Cap Screw is a type of fastener characterized by its twelve-sided head, which provides a larger contact area compared to standard hex cap screws. This design reduces the risk of cam-out during tightening and offers more torque application capability. In the automotive industry, twelve point cap screws are commonly used in applications where high strength and resistance to loosening are required ¹.

Role of the 3081551 Twelve Point Cap Screw in Truck Operation

This part is utilized in various components of heavy-duty trucks. It is often found in engine assemblies, where it secures critical parts such as cylinder heads and valve covers. Additionally, it is used in chassis assemblies to fasten components that experience significant stress and vibration. The screw’s robust design ensures that these connections remain secure under demanding conditions.

Key Features of the 3081551 Twelve Point Cap Screw

This Cummins part is engineered with several key features that make it suitable for heavy-duty applications. Its twelve-point head design allows for greater torque application and reduces the likelihood of cam-out. The screw is manufactured from high-grade steel, providing excellent strength and durability. The thread pitch is optimized for secure fastening, ensuring that components remain firmly in place even under high stress conditions.

Benefits of Using the 3081551 Twelve Point Cap Screw

Using this part offers several advantages. The screw’s design allows for enhanced torque application, making it easier to achieve the required tightening specifications. The reduced risk of cam-out ensures that the screw can be tightened without slipping, leading to more reliable connections. Additionally, the high-grade steel used in its construction provides improved durability, allowing the screw to withstand the rigors of heavy-duty truck operation.

Installation and Usage Guidelines

Proper installation of the 3081551 Twelve Point Cap Screw is crucial for ensuring its performance and longevity. When installing the screw, it is important to use the correct torque specifications to avoid over-tightening or under-tightening. Recommended tools include a torque wrench to achieve the precise torque required. Following manufacturer guidelines for installation will help maintain the integrity of the fastening and the components it secures.

Troubleshooting and Maintenance

Common issues that may arise with this part include stripping or seizing. Regular inspection and maintenance can help identify these problems early. If a screw shows signs of wear or damage, it should be replaced to prevent failure. Additionally, ensuring that all components are clean and free of debris before installation can help maintain the screw’s performance over time.

Cummins: A Brief Overview

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 has established a strong reputation in the heavy-duty truck industry for producing reliable and high-performance components. The company’s product range includes engines, powertrains, and aftermarket parts, all designed to meet the needs of demanding applications.

Twelve Point Cap Screw 3081551 in Cummins Engines

The Twelve Point Cap Screw 3081551 is a component in various Cummins engines, ensuring secure fastening and structural integrity. This part is integral to the assembly and operation of several engine models, including:

• QSK19 CM2350 K105
• QSK19 CM2350 K114
• QSK19 CM2350 K144G
• QSK19 CM500
• QSK19 CM850 MCRS
• QSK19G

In these engines, the Twelve Point Cap Screw 3081551 is used in multiple applications, often where high strength and durability are required. It is typically employed in areas that demand reliable fastening, such as securing engine components, brackets, and other structural parts. The screw’s design, with twelve points, provides a better grip and distributes the load more evenly, reducing the risk of stripping or damage under high torque conditions.

For the QSK19 CM2350 series (K105, K114, K144G), the Twelve Point Cap Screw 3081551 is used extensively in the engine’s internal and external mounting systems. These engines, known for their robust performance, rely on this screw to maintain the alignment and stability of critical components, ensuring smooth operation and longevity.

In the QSK19 CM500 and QSK19 CM850 MCRS, the screw is utilized in similar fashion, providing essential fastening in both the engine block and ancillary systems. The MCRS variant, with its advanced features, also benefits from the enhanced grip and load distribution offered by the Twelve Point Cap Screw.

The QSK19G engine, part of the QSK series, incorporates the Twelve Point Cap Screw 3081551 in its design to ensure that all components are securely fastened, contributing to the engine’s overall reliability and efficiency.

Role of Part 3081551 Twelve Point Cap Screw in Engine Systems

The part 3081551 Twelve Point Cap Screw is instrumental in securing and maintaining the integrity of various engine components. In the block, this cap screw ensures that all bolted connections remain tight, preventing any potential leaks or misalignments that could compromise engine performance.

Within the cylinder, the Twelve Point Cap Screw is often used to fasten cylinder head components, ensuring a secure seal that is vital for maintaining compression and preventing coolant or oil leaks.

The follower components, which are part of the valve train system, rely on the Twelve Point Cap Screw to maintain proper tension and alignment. This is essential for the smooth operation of the valves and overall engine efficiency.

In the cam system, these cap screws are used to secure cam bearings and other cam-related components. This ensures that the camshaft operates within specified tolerances, contributing to the precise timing of valve events.

For the Service Coupling 2008 Assembly and Service Coupling 2009 Assembly, the Twelve Point Cap Screw plays a role in maintaining the structural integrity of these couplings. These assemblies often involve high-stress areas where secure fastening is paramount to prevent failures.

In the context of the Short Block Kit, the Twelve Point Cap Screw is used extensively to assemble and secure various components within the short block. This includes main caps, cylinder head bolts, and other critical fastening points that ensure the short block operates as a unified and reliable unit.

Overall, the part 3081551 Twelve Point Cap Screw is a fundamental component in ensuring that engine systems remain securely assembled, operating efficiently, and lasting longer under various stress conditions.

Conclusion

The 3081551 Twelve Point Cap Screw by Cummins is a critical component in heavy-duty truck applications, providing secure fastening and structural integrity in various engine systems. Its design, featuring a twelve-point head and high-grade steel construction, ensures reliable performance under demanding conditions. Proper installation and maintenance are essential to maximize the screw’s longevity and effectiveness in ensuring the reliability and efficiency of heavy-duty truck engines.