Thomas 3667 Seal, (National 455079) 2.500 x 3.751 x .500 - EParts PlusOne New Aftermarket Replacement Oil Seal 2. 500" x 3. 751" x 0. 500" (Thomas 3667 National 455079) This nitrile rubber rotary shaft oil seal prevents lubricant leakage and keeps contaminants out of bearings, axles, transmissions, and other rotating shaft assemblies in agricultural and general equipment applications. It features a solid single lip design with a spring loaded garter spring and a steel outer Fits Case for a secure press fit into the