"6875 IN. BORE DIA 1.462 IN,OD .288 IN. THK CADMIUM PLATED ANGLE VARIATION LIMITED TO PLUS OR MINUS 00 DEG- 30 MIN CORNERS BROKEN GROOVES GROUND AFTER CADMIUM PLATING SELECTED CLASSIFIED AND TESTED BY THE ASSY MFR AT HIS PLANT MIL-STD-102A IDENTIFICATION CODE 999-36003-9900"