Aluminum alloy, qq-a-200/8, temp t6; oxide film, mil-c-5541, type 1 or 2, grade c, cl 3; o/a hg 0.188 in., flange lg 1.000 in., flange wd 0.500 in., base lg 0.886 in., base wd 0.386 in.; hole through top 0.359 in. Dia, 0.060 in.Dp then 0.251 in. Dia; 2 holes through sides 0.070 in. Diameter through 90.0-120.0 degrees csk by 0.086 in. Dia, 0.086-45 unc-2b, both sides 4 threads
