| GENERAL CHARACTERISTICS ITEM DESCRIPTION | STEEL,CMPSN 1018-1022,1117,OR 1118,ASTM-A108; 0.870 IN. DIA.; 0.437 IN.HIGH; CENTRAL HOLE IS 0.562 IN. DIA.; 25 EQUALLY SPACED NOTCHES; HEAT TREATMENT=CARBURIZE AT 1600-1650 DEG. F. TO CASE DEPTH OF 0.015-0.020 IN.,OIL QUENCH,TEMPER AT 350 DEG. F. FOR 30 MIN. TO ROCKWELL HARDNESS 15N 88-92; MANGANESE PHOSPHATE,TYPE M,OR ZINC PHOSPHATE,TYPE Z,PER MIL-P-16232,CLASS 1 |