5aluminum alloy a360, qq-a-591; 0.925 in high; 5.350 in. R; 2 places, 0.440 in. Max dia, 3/8-16unc-2b; 4 places, 0.630 in. Dia; 9 places, 0.280 in. W; 0.377 in. Dia, taper allowed to increase dimension 1/2 degrees per inch; cargo removal plate upper f/apam