2U5345 O-Ring 154.5 Fits Caterpillar ModelsOne New Aftermarket Replacement O Ring Seal for Caterpillar (Cat) Equipment This aftermarket replacement O ring seal (Caterpillar part number 2U 5345) measures 154. 5mm inner diameter with a 75A durometer hardness rating. It is used across a wide range of Caterpillar construction and earthmoving equipment as a precision sealing component in hydraulic, engine, and general service applications. Keeping a correct fitting seal on hand minimizes downtime
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