0.7500" outside diameter raised surface on backface 4.720 in. dia. min., 4.722 in. dia. max, 0.241 in. min height, 0.246 in. max height; 0.500-14 npt plug thread thru aperture; secondary raised surface on front face; threaded thru hole in od of body 0.250-18 npt, 0.560 in. nom from backface to centerline round