1H8720 SEAL O RING 8H5414 785407 Fits Caterpillar (Fits CAT) !!!FREE SHIPPING! Home [search.google]. One New Aftermarket Replacement O Ring Seal for Caterpillar (Cat) Equipment This aftermarket replacement O ring seal is designed to provide a reliable, leak free seal in Caterpillar (Cat) construction and industrial equipment. O rings of this type are used throughout Cat machines in hydraulic systems, engines, and general service applications to prevent fluid contamination and maintain system pressure. Compatible Models Caterpillar (Cat): Broad application across Caterpillar construction and industrial equipment. Verify fitment by cross referencing OEM part numbers 1H8720 and 8H5414 against your machine's parts manual before ordering. Replaces Part Number(s): 1H8720, 1H8720 A, 1h8720, 1h8720 A, 8H5414, 785407, 1757894, 70562327 New aftermarket replacement part not remanufactured, not used.