Material aluminum alloy qq-a-250/11 type 6061-tg, chromatic conversion coating mil-c-5541 type 2 class 1 grade c, hexagon shaped 4.320 in. Nom across the flats, 0.125 in. Nom thick, 0.188 in. Nom wide slots in the apex of the hexagon, 6 drilled holes 0.210 in. Min and 0.220 in. Max equally spaced on 3.625 in. Diameter bolt circle, 2 drilled holes 0.1875 in. Min and 0.1885 in. Max diameter 180.0 degrees apart, 2.457 in. Nom diameter hole in center of plate
