O/a dim., 4.500 in. Of of flange; 0.285 in. Lg of flange; 4 in. Od of body, 2.000 in. O/a lg of body; consists of one plate assembly part no. Y9977s, one plate assembly part no. Y85365, and one elastomer, 2.250 in. Wide with 2 drilled steel plates in center 1/2-20 unf-2b thd