| GENERAL CHARACTERISTICS ITEM DESCRIPTION | STEEL,CASTING,COMP IC8620,MIL-S-22141 AND STEEL,BAR,CARBON,COMP 8620 OR86L20,KILLED,SPHEROIDIZED,GRAIN SIZE 5-7,ASTM-A331; MANGANESE PHOSPHATE,MIL-P-16232,TYPE M,CLASS 1; HEAT TREATMENT=AUSTENITIZED IN A NEUTRAL ATMOSPHERE FOR 10 MIN. AT 850 DEG. C.,OIL QUENCH,TEMPER FOR 1 HR. MIN. TO RH A63-69; 7.03 MM. W.; 16.05 MM. LG. |