4069884
Twelve Point Cap Screw
Cummins®

The 4069884 Twelve Point Cap Screw is a specialized fastener produced by Cummins, a leading manufacturer in the commercial truck industry. This cap screw is designed for use in heavy-duty applications, where it plays a significant role in securing various components and ensuring the structural integrity of commercial trucks.

Basic Concepts of Twelve Point Cap Screws

A twelve point cap screw is a type of fastener that features twelve sides instead of the six found on standard hex cap screws. This design allows for a greater contact area with the wrench, reducing the likelihood of cam-out and providing a more secure grip during installation and removal ¹. Twelve point cap screws are commonly used in mechanical assemblies where precision and durability are paramount.

Purpose and Role in Truck Operation

In the context of commercial truck operations, the 4069884 Twelve Point Cap Screw serves to secure critical components, ensuring they remain firmly in place under various operational stresses. Its role is vital in maintaining the structural integrity of the truck, particularly in areas subjected to significant vibration and load. By securely fastening components, it helps prevent loosening, which could lead to mechanical failure or safety hazards.

Key Features

The 4069884 Twelve Point Cap Screw is characterized by several key features that enhance its performance and durability. Its twelve-sided design provides a more secure grip, reducing the risk of cam-out. The screw is typically made from high-strength materials, ensuring it can withstand the rigors of heavy-duty applications. Additionally, it may feature a corrosion-resistant coating to protect against environmental factors, extending its service life ².

Benefits

Using the 4069884 Twelve Point Cap Screw offers several benefits. Its design allows for improved torque application, ensuring components are securely fastened. The reduced risk of cam-out enhances installation efficiency and safety. Furthermore, its resistance to loosening and corrosion contributes to the longevity of the fastener in demanding applications.

Installation Guidelines

Proper installation of the 4069884 Twelve Point Cap Screw is crucial for ensuring secure fastening. Begin by selecting the appropriate wrench that fits the twelve-sided head of the screw. Apply a consistent torque using a torque wrench to achieve the manufacturer’s recommended torque specifications. Ensure the screw is aligned correctly with the threaded hole to prevent cross-threading. Finally, double-check the tightness of the screw to confirm it is securely fastened ³.

Troubleshooting and Maintenance

Common issues with twelve point cap screws include loosening due to vibration and corrosion. To troubleshoot these problems, regularly inspect the screws for signs of wear or corrosion. If loosening is detected, re-tighten the screw to the recommended torque specification. Applying a thread locker can help prevent future loosening. For corrosion, clean the screw and surrounding area, and consider applying a protective coating to prevent further degradation.

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 for quality and reliability in the commercial truck industry. Their product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of heavy-duty applications.

Twelve Point Cap Screw 4069884 in Cummins Engines

The Twelve Point Cap Screw 4069884, manufactured by Cummins, is a critical component in various Cummins engine models. This screw is integral to the assembly and maintenance of these engines, ensuring secure fastening and structural integrity.

Engines Utilizing 4069884

6C8.3, K19, KTA19GC, QSB5.9 CM850, QSB6.7 M CM2250, QSC8.3 CM850 (CM2850), QSK19 CM2350 K114, QSK19 CM2350 K144G, QSK19 CM500, QSK19 CM850 MCRS, QSK19G, QSM11 CM570

These engines, while differing in their specific configurations and applications, share a commonality in their use of the Twelve Point Cap Screw 4069884. This screw is employed in various capacities across these engines, often in areas requiring robust fastening solutions.

Grouping by Engine Series

• QSB Series: The QSB5.9 CM850 and QSB6.7 M CM2250 engines utilize the 4069884 screw in their assembly, ensuring critical components are securely fastened.
• QSC Series: The QSC8.3 CM850 (CM2850) engine incorporates this screw, highlighting its importance in maintaining the engine’s structural integrity.
• QSK Series: The QSK19 CM2350 K114, QSK19 CM2350 K144G, QSK19 CM500, QSK19 CM850 MCRS, and QSK19G engines all rely on the 4069884 screw for various fastening needs.
• QSM Series: The QSM11 CM570 engine also uses this screw, emphasizing its versatility across different engine models.

6C8.3 and K19 Engines

The 6C8.3 and K19 engines, while distinct in their design, also incorporate the 4069884 screw in their assembly processes. This demonstrates the screw’s broad applicability across different engine types.

KTA19GC Engine

The KTA19GC engine, known for its robust performance, utilizes the 4069884 screw to ensure that all components are securely fastened, contributing to the engine’s overall reliability and durability.

Part 4069884 Twelve Point Cap Screw Component Usage

The part 4069884 Twelve Point Cap Screw is a versatile fastener utilized in various engine systems and components. Its design allows for secure and efficient assembly and disassembly, making it an essential component in the following applications:

Gear Systems

In gear systems, the Twelve Point Cap Screw is employed to fasten gear housings, ensuring that the gears remain aligned and securely in place. This is particularly important in high-torque applications where the integrity of the gear assembly is paramount. The twelve-point design provides enhanced grip and reduces the risk of cam-out, which is beneficial during maintenance and repair procedures.

Marine Engines

Marine engines often operate in harsh environments, and the Twelve Point Cap Screw is used to secure critical components such as engine mounts, exhaust manifolds, and fuel system components. Its resistance to corrosion and ability to maintain a tight seal under varying conditions make it suitable for marine applications. The screw’s design also facilitates easier tightening and loosening, which is advantageous in the confined spaces often found on marine vessels.

Engine Installation Kits

Engine installation kits frequently include the Twelve Point Cap Screw to ensure that all components are properly secured during the installation process. These kits may contain screws for mounting the engine to the frame, securing ancillary components, and attaching various brackets and supports. The consistent use of this screw throughout the kit ensures uniformity in torque application and simplifies the installation process for engineers and mechanics.

General Engine Systems

Across various engine systems, the Twelve Point Cap Screw is used to fasten components such as cylinder heads, valve covers, and intake manifolds. Its application in these areas ensures that components remain securely attached, reducing the risk of leaks and misalignments. The screw’s design also allows for precise torque settings, which is essential for maintaining the integrity and performance of the engine system.

Conclusion

The 4069884 Twelve Point Cap Screw is a critical component in the assembly and maintenance of Cummins engines, offering enhanced grip, resistance to corrosion, and precise torque settings. Its versatility and reliability make it an indispensable part in various engine systems and components, ensuring the structural integrity and performance of commercial trucks and marine engines.