"STEEL,AMS6515,COMP 4340,CONDITION ANNEALED,OR STEEL,MIL-S-5000,COMP 4340,CONDITION C OR E,3.150 IN. BODY ID,3.324 IN. MIN,3.325 IN.MAX BODY OD,3.75 IN. FLANGE OD,0.210 IN. FLANGE W,0.510 IN. O/A LG,OD OF BODY 63 MICROINCHES AA,ALL OTHER SURFACES 125 MICROINCHES AA,ROCKWELL HARDNESS C SCALE 34 TO 38,2 NOTCHES IN BODY OPPOSITE OF FLANGE150 DEG APART,0.44 IN. W,0.13 IN. DEEP"