| GENERAL CHARACTERISTICS ITEM DESCRIPTION | STEEL,CMPSN 1018-1022 OR 1118,ASTM-A108; 1.497 IN. DIA.; 0.395 IN. DIA.; CENTRAL HOLE IS 0.627 IN. DIA.; HEATTREATMENT=CARBURIZE AT 1575-1625 DEG. F. TO CASE DEPTH OF 0.007-0.010 IN.,OIL QUENCH,TEMPER 30 MIN. AT 350 DEG. F.MIN. TO ROCKWELL HARDNESS 15N88-92; 50NOTCHES EQUALLY SPACED ALONG EDGE |