Xc/o base, grease plate, o ring, shaft, cover, valve; matl: stainless steel; dim: 1.500 in. Inside dia, 0.437 in. Shaft dia, 1.437 in. Diameter by 0.125 in. Thk grease plate w/eight 0.250 in. Diameter holes evenly spaced on 0.968 in. Diameter bolt circle