| GENERAL CHARACTERISTICS ITEM DESCRIPTION | STEEL,ASTM A322 OR A331,8640 + 8740; STEEL,MIL-S-22141,IC-8640,MIL-C-6021 AND TEST WILL NOT APPLY; HEAT TREATMENT: HEAT AT 1525-1550 DEG. F.,OIL QUENCH,TEMPER 45 MIN. AT HEAT TO HARDNESS SPECIFIED; MANGANESE PHOSPHATE,TYPE M,OR ZINC PHOSPHATE,TYPE Z,PER MIL-P-16232,CLASS 1; 1.197 IN. LG.; 0.716 IN.W.; 0.217 IN. THK. |