National 4278 Differential Pinion Seal

Features. A proprietary RediCoat sealant to eliminate bore leakage.. Patented lay-down sealing lip design ensures long life in spite of extreme temperatures shaft imperfections shaft/bore misalignment and excessive shaft thrust or movement.. Material – Fluoroelastomer. Shaft Size – 1.812 in.. Housing Bore – 3.091 in.. Outer Diameter – 3.096 in.. Flange Diameter – 3.4 in.. Width – 0.485 in.