40.562 in. O/a dia.; 0.120 o/a diacenter hole; six holes 0.093 diameter equally spaced at 60 degrees on 0.406 dia.; matbrs alloy 260 or 268, tem 1/2 h, 0.021porm 0.0018 thk per qq-b-613; finish tin plate 0.0001 min thk type 1 per mil-t-10727 (580-0151-000)
