3012475
Captive Washer Cap Screw
Cummins®

Introduction

The Cummins 3012475 Captive Washer Cap Screw is a specialized fastener designed for use in commercial trucks. It is engineered to provide secure and reliable fastening in various truck components, ensuring the integrity and performance of the vehicle. This screw is particularly valued in the trucking industry for its robust design and ease of use.

Basic Concepts of Captive Washer Cap Screws

A captive washer cap screw is a type of fastener that includes an integrated washer. This design ensures that the washer remains in place during installation, reducing the risk of loss and simplifying the fastening process. Captive washer cap screws are commonly used in mechanical assemblies where consistent and secure fastening is required. They are particularly useful in environments where vibrations or frequent disassembly and reassembly occur ¹.

Purpose of the Cummins 3012475 Captive Washer Cap Screw

The Cummins 3012475 Captive Washer Cap Screw plays a role in the operation of a truck by providing a secure and reliable fastening solution for various components. It is used in applications where maintaining a tight and consistent connection is crucial, such as in engine mounts, chassis components, and other critical areas. The screw’s design helps to ensure that connections remain intact under the demanding conditions experienced by commercial trucks, contributing to overall vehicle performance and safety ².

Key Features

The Cummins 3012475 Captive Washer Cap Screw features a durable material composition, typically made from high-strength steel to withstand the rigors of commercial truck use. Its design includes an integrated washer that remains captive during installation, ensuring that the washer does not become misplaced. Additionally, the screw may have a corrosion-resistant coating to enhance its longevity in harsh environments ³.

Benefits

Using the Cummins 3012475 Captive Washer Cap Screw offers several benefits. The integrated washer design simplifies the installation process, reducing the time and effort required compared to traditional screws and washers. This can lead to increased efficiency during maintenance and repair operations. The screw’s robust construction and corrosion-resistant properties contribute to improved reliability and longevity, potentially reducing the need for frequent replacements and associated costs.

Installation Process

Proper installation of the Cummins 3012475 Captive Washer Cap Screw involves several steps. First, ensure that the mating surfaces are clean and free of debris. Use the appropriate torque wrench to install the screw, applying the recommended torque specification to achieve a secure connection without over-tightening. It is important to follow the manufacturer’s guidelines for torque values to ensure optimal performance and avoid damage to the screw or surrounding components.

Troubleshooting and Maintenance

Common issues with captive washer cap screws may include loosening due to vibrations or corrosion. Regular inspection and maintenance can help identify these problems early. If a screw appears loose, it should be re-tightened to the specified torque. In cases of significant corrosion, replacement may be necessary to ensure continued reliability. Proper lubrication of threads during installation can also help prevent seizing and facilitate future removal.

Comparative Analysis

When compared to similar products from other manufacturers, the Cummins 3012475 Captive Washer Cap Screw may offer distinct advantages in terms of design, performance, and application. Cummins’ reputation for quality and durability is reflected in this product, which is engineered to meet the high standards required in the commercial truck industry. Differences may include material composition, corrosion resistance, and specific design features tailored to Cummins applications.

Safety Considerations

When handling and installing the Cummins 3012475 Captive Washer Cap Screw, it is important to observe several safety guidelines. Wear appropriate personal protective equipment, such as gloves and safety glasses, to protect against injury. Ensure that the work area is clean and free of hazards. Follow all torque specifications to avoid over-tightening, which can lead to stripped threads or component damage. Additionally, be mindful of the screw’s sharp edges and handle it carefully to prevent cuts or injuries.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emissions technologies. With a history spanning over a century, Cummins has established a strong reputation for innovation, quality, and reliability in the commercial truck industry. The company’s product range includes engines, powertrains, and related components designed to meet the demanding requirements of commercial vehicles.

Compatibility with Cummins Engines

The Captive Washer Cap Screw part number 3012475, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is integral in securing components within the engine assembly, ensuring stability and reliability. Below is a detailed breakdown of the engines with which this part is compatible:

G855 Series

• G855
• G855 CM558

GTA38 Series

• GTA38 G CMEICS G116C
• GTA855 CM558 (CM2358) G101

K Series

• K19
• K38
• K50

KTA19GC Series

• KTA19GC
• KTA19GC CM558

N14 Series

• N14 G
• N14 MECHANICAL

NH/NT 855 Series

• NH/NT 855

QSK19 Series

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

QST30 Series

• QST30 CM2350 T101
• QST30 CM552

V Series

• V903

VTA903 Series

• VTA903 CM2250 V105

This part is engineered to meet the stringent requirements of Cummins engines, providing a reliable fastening solution across a diverse range of engine models.

Role of Part 3012475 Captive Washer Cap Screw in Engine Systems

The Part 3012475 Captive Washer Cap Screw is integral to the secure assembly and operation of various engine components. Its application spans across multiple systems, ensuring the integrity and efficiency of the engine’s functionality.

In the Accessory Drive Mounting system, this screw plays a role in attaching accessories to the engine, ensuring they are firmly in place and operate smoothly.

For the Air Compressor and Air Manifold, the screw is used to secure components that manage air flow, contributing to the compressor’s efficiency and the manifold’s structural stability.

In the Air Mounting Manifold and Compressor Air Support, it ensures that the air passages are securely held together, which is essential for maintaining the pressure and flow of air within the system.

The Breather & Filler system benefits from the screw’s ability to keep the components tightly sealed, which is vital for the proper ventilation and filling of the engine’s lubrication system.

For the Cam Follower, the screw is used in the assembly to ensure the follower moves smoothly along the camshaft, which is important for the engine’s valve operation.

In the Cooler Filter and Engine Oil Cooler systems, the screw helps in securing the filter and cooler components, which are essential for maintaining the oil’s temperature and cleanliness.

The Corrsn. Rest. Mtg. (Corrosion Resistance Mounting) and Cover Hydraulic Pump Mounting utilize the screw to ensure that the pump cover is securely attached, which is important for the pump’s operation and the system’s resistance to corrosion.

For the EBM: Resistor, Corrsn. (Electric Blower Motor Resistor, Corrosion), the screw is part of the assembly that protects the resistor from environmental factors, ensuring consistent performance.

In the Fan Drive Arrangement and Freon Mounting Compressor, the screw is used to secure components that are part of the engine’s cooling system, which is important for maintaining optimal operating temperatures.

The Fuel Filter and Lubricating Oil Filter systems rely on the screw to keep the filters securely in place, which is essential for filtering impurities from the fuel and oil.

For the Lubricating Suction Connection and Lubricating Suction Flange, the screw ensures that the connections are tight, which is important for the proper suction and flow of lubricants.

In the Mounting Fuel Bypass Hose and Oil Cooler Kit, the screw is used to secure hoses and components that are part of the fuel and oil cooling systems, ensuring they are properly positioned and sealed.

The Oil Pan Adapter Mounting and Oil Transfer Housing systems use the screw to ensure that the oil pan and transfer housing are securely attached, which is important for the containment and transfer of oil within the engine.

For the Radiator and Spare Mounting, the screw is part of the assembly that ensures the radiator is securely mounted and any spare components are properly attached.

Lastly, in the Suction Tube system, the screw is used to secure the tube, which is important for the proper suction of fluids within the engine system.

Conclusion

The Cummins 3012475 Captive Washer Cap Screw is a critical component in the maintenance and operation of commercial trucks. Its robust design, ease of use, and compatibility with a wide range of Cummins engines make it an essential part for ensuring the reliability and performance of truck components. Proper installation and maintenance of this screw contribute to the overall efficiency and safety of the vehicle.