| GENERAL CHARACTERISTICS ITEM DESCRIPTION | STEEL,ASTM A322,4140;STEEL,ASTM A331,4140;STEEL,CMPSN IC4140 MIL-S- 22141;PREALLOYED STEEL POWDER FORGINGSPER MIL-F-45961;1.719 IN.LG;0.610 IN. W;0.530 IN.H;HEAT TREATMENT:152 TO 1575 DEGREES F.,QUENCH IN CIRCULATING OIL,TEMPER TO HARDNESS SPECIFIED; SURFACE TREATMENT:MANGANESE PHOSPHATE,MIL-P-16232,TYPE M,CLASS 1;CLASSIFICATION AND INSPECTION OF INVESTMENT CASTING IAW CLASS 2,GRADE B,MIL-C-6021 |