| GENERAL CHARACTERISTICS ITEM DESCRIPTION | STEEL,FED SPEC ASTM A322 OR ASTM A331,8640,8740;0.980 IN.H;0.374 IN. DIA;COUNTERSUNK TO DEPTH OF 0.312 IN. AND 0.250 IN.DIA;SURFACE TREATMENT: MANGANESE PHOSPHATE,MIL-P-16232,TYPE M,CLASS 1;HEAT TREATMENT:HEAT AT 1525 TO 1550 DEGREES F.,OIL QUENCH,TEMPER 45 MINUTES |