Steel, sq flange end, 5.563 in. Sq, w/eight 0.813 in. Id bolt holes spaced 2.250 in. C to c, raised rd flange on other end, 5.500 in. Od, 3.063 in. Id, 0.500 in. Thk, four 0.563 in. Diameter bolt holes on 4.500 in. Diameter bolt circle, w/raised face, 3.500 in. @od 0.188 in. H; 2.500 in. O/a h