Used on an/fps-26. 2.625" outside diameter additional set of four mounting holes 0.295 in. min dia 0.300 in. max dia, equally spaced on 2.218 dbc in alternating positions w/other mounting holes cadmium surface treated round
7.980" outside diameter 2nd raised surface on backface 0.254 in. min to 0.264 in. max h, 6.874 in. dia min to 6.876 in. dia max dia; circumferential groove in backface 0.040 in. deep, 0.387 in. wide, 5.800 in. dia to 6.573 dia; five unequally spaced thru hole in flange on 6.523 in. dia blt cir, 0.060 in. dia, cbore 0.375 in. dia by 0.060 in. dp round
2.750" outside diameter ethree bolt holes each side of center line spaced 45 deg apart on 2.375 in. dia bolt circle; raised surface length 0.188 in. nom; corner bevel dimension 0.031 in. by 45 deg; round aperture chromate surface treated