4B4280 Washer for Caterpillar Equipment — SKU 4B4280

4B4280 is a flat washer used with Caterpillar equipment, including articulated dump trucks and backhoe loaders. The washer is designed for use with compatible 1/2-inch bolts and has an inner diameter of 0.531 inches, an outside diameter of 1.063 inches, and a thickness of 0.098 inches.

This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

Fitment

The washer is listed for the following Caterpillar equipment types and models:

• Caterpillar articulated dump trucks
• Caterpillar backhoe loaders
• Caterpillar D350E
• Caterpillar D400E
• Caterpillar 416B
• Caterpillar 426C
• Caterpillar 428B
• Caterpillar 436C
• Caterpillar 438C
• Caterpillar 438D
• Caterpillar 442D
• Caterpillar 446B

Fitment is based on the listed equipment applications and model references. The part is identified as hardware for use in the corresponding fastening assembly. Compatibility with a specific machine should be checked against the equipment parts documentation and the required washer dimensions.

Cross-reference numbers

4B4280 and 4B-4280 are the listed number formats for this washer. The hyphenated format may be used in equipment parts records, while the unhyphenated format is used as the product SKU.

Specifications

The washer has a circular flat profile with the specified inner and outside diameters. The 0.531-inch inner diameter corresponds to the listed 1/2-inch bolt application. The stated material is soft steel with a minimum yield strength of 140 MPa, and the recorded finish is brass.

Supplied part identification: 4B4280. The component is listed as an individual washer; no additional fasteners or installation hardware are specified in the available product data.