Aluminum 7075-t7351, qq-a-225/9 cond t7351, anodize per ps13201, ty ii, cl 1, cap hex, 1.375 across flat, 0.550 in. High, ck diameter 1.2150 in. Nom, 2 nd diameter 0.750 in. Nom, opp end int thd 1.125-12 unj-3b per mil-s-8879, dia 1.1064 diameter nom, hole configuration, hexagon corners, 2 holes 0.062 in. Dia