CAT 122-0333 Internal Tab Washer

Product Overview

The CAT 122-0333 Internal Tab Washer is a Genuine Caterpillar OEM locking washer designed to prevent nuts and other threaded fasteners from loosening in demanding machine applications. Manufactured to Caterpillar’s exact OEM specifications, this internal tab washer provides positive mechanical locking by engaging a shaft or keyed feature with its internal tab while allowing one or more external tabs to be bent against the fastener after installation. This design helps maintain proper clamp load and improves fastening reliability in high-vibration environments.

The 122-0333 Internal Tab Washer is manufactured from carbon steel and is engineered for heavy-duty Caterpillar equipment where secure retention of critical fasteners is essential. As a Genuine Caterpillar OEM replacement part, it restores factory fastening performance while ensuring proper fit, durability, and long service life.

Key Features

• Genuine Caterpillar OEM Internal Tab Washer
• Part Number: 122-0333
• Internal tab locking washer design
• Prevents fastener loosening caused by vibration
• Manufactured from carbon steel
• Provides positive mechanical locking
• Designed for high-load fastening applications
• Precision-manufactured to Caterpillar specifications
• Corrosion-resistant finish suitable for heavy equipment service
• Direct OEM replacement for Caterpillar applications

Technical Specifications

Note: Caterpillar has not published additional information such as coating type, hardness, torque values, or dimensional tolerances for the CAT 122-0333 Internal Tab Washer beyond the specifications listed above.

Application Information

The CAT 122-0333 Internal Tab Washer is used in Caterpillar heavy equipment to mechanically secure threaded fasteners where vibration or dynamic loading could otherwise cause loosening. After installation, the internal tab locates the washer while an outer tab is bent against the nut or retaining component, creating a positive locking mechanism that helps maintain proper assembly preload.

Manufactured to Caterpillar OEM standards, the washer is designed to withstand:

• Heavy vibration
• Shock loading
• High clamp loads
• Continuous operating conditions
• Harsh construction and mining environments

These characteristics help maintain fastener integrity, improve assembly reliability, and reduce maintenance requirements.

Compatible Caterpillar Equipment

The CAT 122-0333 Internal Tab Washer is compatible with the following Caterpillar equipment:

Track-Type Tractors

• D10
• D10R
• D10T
• D10T2

Compatibility should always be verified using the machine’s:

• Product Identification Number (PIN)
• Machine Serial Number
• Arrangement Number
• Existing washer part number

Verification through Caterpillar Parts information or an authorized Cat dealer is recommended before ordering.

Additional Compatibility Information

The 122-0333 Internal Tab Washer is a configuration-specific fastening component. Before installation, verify:

• Machine model
• Product Identification Number (PIN)
• Machine serial number
• Existing washer part number
• Fastener size
• Nut and shaft dimensions
• Assembly arrangement number

Any modifications to the original equipment configuration may affect compatibility. Confirmation through Caterpillar Parts information or an authorized Cat dealer is recommended before installation.

Benefits

Installing a genuine CAT 122-0333 Internal Tab Washer helps:

• Restore secure OEM fastener locking
• Prevent nut loosening caused by vibration
• Maintain proper clamp load in critical assemblies
• Improve reliability of heavy-duty equipment
• Reduce maintenance related to loose fasteners
• Simplify service with a direct OEM replacement
• Preserve factory fastening performance
• Deliver OEM-quality fit, durability, and long-lasting reliability in demanding operating environments.