Description Oil seal, outer, for rear axle shaft. Tractors: 8N (to s/n 486753). 2.750" I.D., 3.750" O.D. This item is a suitable alternative for the following: A8NN4251A-PAIR, V32728, AA8NN4251A, A8N4251B, A-A8NN4251A, A-8N4251B, 8N4251B, 8N4251B-PAIR, 8N4251BPAIR