MRC:
A recording of the physical,functional,and performance characteristics for an item of supply.TEXT
General Description:
Steel MIL-S-6758, 4130, cond C4; steel QQ-S-681, class 150-125, except carbon 0.43% max manganese 0.90% max sulphur 0.05% max phosphorous 0.03% max 8.690 in Lg 7.660 in W 3.124 in Ht heat treatment: wrought material = heat at 1575-1625 deg F oil quench temper to rockwell hardness C30-C36; heat treatment: cast material = normalize austenize oil quench and temper to rockwell hardness C30-C36; enamelper TT-E-527, olive drab
