17.000" outside diameter 20 thread quantity per inch circumferential groove on od of body, 0.875 in. wide, 15.000 in. dia, 0.200 in. from face opposite raised surface; two in line holes thru front face, 0.271 in. dia min. to 0.278 in. dia max dia, 2.125 in. center to center, 1.062 in. right chromate surface treated round unc thread series