"STEEL MIL-S-5000 COMP 4340 COND C,CADMIUM PLATE PS13145TY 2 CL 2,12 POINT FLANGE 3.115 IN. ACROSS 12 PLACES 0.137IN. THK,1.162 IN. O/A H,BORE THRU 2.125 IN. DIA,2.500-16 UNJ-3ATHD 0.410 IN. MIN TO 0.425 IN. MAX LG,SIX HOLES 0.125 IN. MIN TO0.130 IN. MAX DIA THRU FLANGE ON 3.020 IN. MIN TO 3.030 IN. MAXBOLT CIRCLE DIA,HEAT TREAT 180000 TO 200000 PSI PS15033"