Steel, hs132 group 4-fscm 73030, 1.2188 in.Nom o/a lg, 1.4688 in. Nom housing od, 1.4040/1.4080 in. Diameter thrust bearing chamber, 0.5625 in. Od of inner hub at bearing end, 0.627 in. Od of hub at other end, 40.125 in. Diameter mtg holes, 1.000 in. Mtg hole circle dia, od surface of other end hub not cadmium plated