Description Rocker shaft bushing, 2 used. I.D. 2.000", O.D. 2-3/8", L. 3.00". Tractors: all models (1939-1964), 2000, 3000 (except 3550), 4110 (1965-11/1971). This item is a suitable alternative for the following: 9N531C, 86534029, 180896M91