3081837
Twelve Point Cap Screw
Cummins®

The Cummins Twelve Point Cap Screw, part number 3081837, is a specialized fastener designed for use in commercial truck applications. This part plays a significant role in ensuring the secure assembly of various components within heavy-duty truck systems. Its design and functionality are tailored to meet the demanding requirements of commercial trucking, where reliability and durability are paramount.

Basic Concepts of Twelve Point Cap Screws

A Twelve Point Cap Screw is a type of fastener characterized by its hexagonal socket head, which provides a larger contact area compared to traditional hex-head screws ¹. This design allows for increased torque application without the risk of cam-out, making it suitable for high-stress applications. Unlike other fasteners, twelve-point screws offer enhanced resistance to stripping, which is crucial in environments where vibrations and high loads are common. The mechanics of twelve-point screws involve a combination of increased surface area and optimized torque distribution, contributing to their effectiveness in securing components under extreme conditions ².

Role of Part #3081837 in Truck Operation

The Cummins Twelve Point Cap Screw part #3081837 is utilized in various applications within heavy-duty truck systems. It is commonly employed in the assembly of engine components, chassis parts, and other critical areas where secure fastening is required. The screw’s design ensures that it can withstand the dynamic forces and environmental conditions encountered in commercial trucking, thereby contributing to the overall reliability and performance of the vehicle.

Key Features

The Cummins Twelve Point Cap Screw part #3081837 boasts several key features that enhance its functionality. It is manufactured from high-strength alloy steel, providing excellent durability and resistance to wear ³. The screw features a fine thread, which allows for precise adjustments and secure fastening. Additionally, the twelve-point head design offers improved torque application and reduced risk of damage during installation and removal. These features collectively ensure that the screw can perform reliably in the demanding conditions of commercial truck operations.

Benefits

Using the Cummins Twelve Point Cap Screw part #3081837 offers several advantages. The increased torque application capability allows for tighter and more secure fastening, which is vital in applications where components are subjected to significant stress. The resistance to stripping ensures that the screw remains intact and functional over time, reducing the need for frequent replacements. Furthermore, the durability of the screw in harsh environments contributes to the longevity and reliability of the truck’s components, ultimately enhancing the vehicle’s performance and safety.

Troubleshooting and Maintenance

Common issues associated with Twelve Point Cap Screws include stripping, corrosion, and loosening over time. To troubleshoot these problems, it is important to inspect the screws regularly for signs of wear or damage. If stripping occurs, it may be necessary to replace the screw with a new one to ensure secure fastening. Corrosion can be mitigated by applying a protective coating or using screws made from corrosion-resistant materials. Regular maintenance, including torque checks and re-tightening as needed, can help prevent loosening and ensure the continued reliability of the fasteners.

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 has established itself as a trusted name in the automotive and heavy-duty truck industries. The company is committed to innovation and quality, consistently delivering products that meet the rigorous demands of commercial applications. Cummins’ focus on research and development ensures that their components, including the Twelve Point Cap Screw part #3081837, are at the forefront of technological advancement and reliability.

Twelve Point Cap Screw 3081837 in Cummins Engines

The Twelve Point Cap Screw part number 3081837, manufactured by Cummins, plays a crucial role in the assembly and maintenance of several Cummins engine models. This part is integral to ensuring the structural integrity and operational efficiency of the engines.

QSK19 CM500 and QSK19G Engines

In the QSK19 CM500 and QSK19G engines, the Twelve Point Cap Screw 3081837 is utilized in various critical applications. Its design, featuring a twelve-point profile, allows for better torque application and reduced rounding of the fastener head, which is essential for maintaining the precise alignment and fastening required in these high-performance engines.

The cap screw is typically employed in areas where high strength and durability are paramount. This includes securing engine components, mounting brackets, and other critical parts that must withstand significant mechanical stresses and thermal variations. The material and construction of the screw ensure it can endure the demanding conditions within these engines, contributing to their overall reliability and longevity.

By integrating the Twelve Point Cap Screw 3081837 into the assembly process, Cummins ensures that the engines maintain their structural integrity and operational efficiency, ultimately supporting the performance and durability expected from these models.

Role of Part 3081837 Twelve Point Cap Screw in Engine Components

The part 3081837 Twelve Point Cap Screw is integral to the assembly and maintenance of various engine components. Its application ensures secure fastening and reliable performance across different parts of the engine system.

Camshaft

In the camshaft assembly, the Twelve Point Cap Screw is used to fasten the camshaft to the cylinder head. This secure attachment is essential for maintaining the precise alignment and operation of the camshaft, which controls the opening and closing of the engine’s valves.

Cylinder Block

Within the cylinder block, these cap screws are employed to attach various brackets and mounting points. They provide the necessary stability for components such as the oil pan, valve covers, and other ancillary parts, ensuring that the block remains structurally sound under operational stress.

Cylinder Head

The cylinder head is another area where the Twelve Point Cap Screw plays a significant role. It is used to secure the head to the cylinder block, ensuring a tight seal that prevents coolant and combustion gases from leaking. This fastening is vital for maintaining engine efficiency and performance.

Cylinder Top Level Assembly Head

In the cylinder top level assembly head, these cap screws are critical for attaching the head to the top-level assembly. This ensures that the components remain aligned and function correctly during engine operation.

Kit

Various engine kits, including short block kits, often require the use of Twelve Point Cap Screws for assembly. These screws help in securing different parts of the kit together, ensuring that the kit is correctly installed and functions as intended.

PDC (Powertrain Control Module)

Although less common, Twelve Point Cap Screws may be used in securing the PDC to its mounting location. This ensures that the module remains firmly in place, protecting it from vibrations and ensuring reliable operation.

Performance Parts

High-performance engine parts often require robust fastening solutions. The Twelve Point Cap Screw is frequently used in performance parts to ensure that upgrades such as aftermarket cylinder heads, camshafts, and valvetrain components are securely installed.

Service Coupling Assemblies

For service coupling assemblies from 2008 and 2009, these cap screws are used to fasten various components within the assembly. This ensures that the service couplings are securely attached, facilitating easy maintenance and reliable performance.

Short Block Kit

In a short block kit, the Twelve Point Cap Screw is used to secure the crankshaft, connecting rod bearings, and main bearings. This ensures that all components within the short block are correctly aligned and function efficiently.

Conclusion

The Cummins Twelve Point Cap Screw part number 3081837 is a critical component in the assembly and maintenance of heavy-duty truck engines. Its design, featuring a twelve-point profile, allows for better torque application and reduced rounding of the fastener head, ensuring precise alignment and secure fastening in high-performance engines. The screw’s high-strength alloy steel construction and fine thread provide durability, resistance to wear, and precise adjustments. Regular maintenance and inspection are essential to address common issues such as stripping, corrosion, and loosening, ensuring the continued reliability and performance of the fasteners. Cummins’ commitment to innovation and quality ensures that this part meets the rigorous demands of commercial applications, contributing to the overall reliability and longevity of the engines.