3B4520 Lockwasher for Caterpillar Equipment

3B4520 is a lockwasher used in Caterpillar engines, generator sets, generators, and industrial engines. The part is identified by the Caterpillar part number 3B-4520 and is used with specified Caterpillar engine and generator equipment.

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

Fitment

The lockwasher is listed for the following Caterpillar equipment types:

• Caterpillar engine-machine applications
• Caterpillar engine-generator set applications
• Caterpillar generator applications
• Caterpillar industrial engine applications

Compatible Caterpillar models and series listed for this part include:

• Caterpillar 3508
• Caterpillar 3508B
• Caterpillar 3412
• Caterpillar 3412C
• Caterpillar 3412E
• Caterpillar SR4
• Caterpillar G3412
• Caterpillar G3516

Fitment should be checked against the equipment model, engine configuration, and the part number marked in the service documentation before installation.

Cross-reference numbers

Specifications

The washer dimensions are an outer diameter of 51.71 mm, an inner diameter of 31.85 mm, and a thickness of 7.92 mm. The listed surface coating is galvanized zinc with a stated 96-hour salt spray rating. The listed part weight is 0.2 lb, and the listed dimensions are 5 cm in length, 5 cm in width, and 0.5 cm in depth.

Part number references for this lockwasher are 3B4520 and 3B-4520. The hyphenated form is used in the Caterpillar part-number format, while 3B4520 is the SKU format for this part.

Use the lockwasher only where the applicable Caterpillar assembly documentation specifies this part number. The dimensions and equipment information above identify the listed application for Caterpillar 3508, 3508B, 3412, 3412C, 3412E, SR4, G3412, and G3516 equipment.