2H3931 Fits Caterpillar (Fits CAT) Replacement O-Ring SealOne New Aftermarket Replacement O Ring Seal Fits Caterpillar (Fits CAT) Equipment This aftermarket replacement O ring seal Fits Caterpillar (Fits CAT) OEM part number 2H3931. Made from Nitrile (NBR) rubber, this O ring is suited for use in static and dynamic sealing applications throughout the Fits Caterpillar equipment line, including engines, hydraulic systems, transmissions, fuel systems, and cooling circuits. NBR compound provides good resistance
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2H3931 Fits Caterpillar (Fits CAT) Replacement O-Ring Seal