"ALUMINUM ALLOY 2024-T3 PER QQ-A-225/6; FINISH CHEM FILM CLASS 1A PER MIL-C-5541,DYED YELLOW; 125.0 MICROINCH MACHINE FINISH OVERALL; 0.810 IN. O/A LG,0.430 IN. O/A W,0.188 IN. O/A H; TWO 2-56UNC-2B 0.250 IN. DEEP ON EACH END; ONE 0.099 IN. DIA HOLE CENTRALLY LOCATED,0.188 IN. LG THRU"