"STEEL MIL-S-5000 CONDITION E4 NO. 4340,AS NOTED CADMIUM PLATE ANDNICKEL PLATE,2.210 IN. MIN TO 2.220 IN. MAX O/A LG,0.7485 IN. MIN TO0.7490 IN. MAX O/A DIA,AS NOTED MACHINED SURFACES 16.0 32.0 63.0 AND125.0 MICROINCH FINISH,HEAT TREAT 16000 TO 180000 PSI"