5P3881 NBR (75) O-Ring for Caterpillar Equipment

The 5P3881 is an O-ring sealing component made from nitrile rubber (NBR) with a hardness of 75 Shore A. It is used in Caterpillar equipment and is identified by SAE AS568 size -43. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is intended for installation in sealing applications where the specified dimensions, material, and hardness correspond to the requirements of the equipment assembly. The product data identifies the equipment brand as Caterpillar; individual machine models or series are not specified in the available information.

Fitment

• Equipment manufacturer: Caterpillar
• Application: sealing assemblies using an SAE AS568 -43 O-ring
• Specific Caterpillar machine models and series: not specified in the available product data

Cross-reference numbers

• 5P3881
• 5P-3881

5P3881 and 5P-3881 designate the same part number format for this O-ring. No additional equipment-manufacturer or supplier reference numbers are provided in the available product data.

Specifications

The dimensional data for the sealing section is provided in inches: a 0.07-inch cross-section diameter, a 3.49-inch inner diameter, and a 3.629-inch outside diameter. The material specification is NBR, with the value 75 referring to the stated Shore A hardness. The available data does not identify a coating, installation position, seal kit contents, or a specific Caterpillar machine model.