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:
Fed standard 66, aisi/sae 1060 federal standard 1st material response or federal standard 66, aisi/sae 1074 federal standard 2nd material response or federal standard 66, aisi/sae 1074 federal standard 3rd material response or federal standard 66, aisi/sae 1075 federal standard 4th material response or federal standard 66, aisi/sae 1095 federal standard 5th material response