Aluminum alloy, qq-a-225/6, composition 2024, temper t4, 0.83 in. Lg, 0.56 in. W, 0.28 in. H, 0.280 in. W cutout at bottom 0.14 in. From eachside with 0.03 in. By 45 degree chamfer bottom corners, two no. 51/0.067in./thru holes at top tapped through no. 2/0.086 in./-56 unc-2b thd spaced0.09 in. From side 0.375 in. Apart, one no. 43/0.089 in./thru hole incenter of plate near bottom cutout tapped through no. 4/0.112 in./-40unc-2b thd spaced 0.372 in. C to c from top holes
