MRC:
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.MDCL
Material Specification:
Mil-s-5059, cond a military specification 1st material response or mil-s-5059, cond a military specification 2nd material response or mil-s-5059, cond a military specification 3rd material response or mil-s-5059, cond a military specification 4th material response or astm a582 assn standard 5th material response