MRC:
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the screw material.CYAW
Screw Material Specification:
Aisi c1010 assn standard 1st material response or aisi c1011 assn standard 2nd material response or aisi c1012 assn standard 3rd material response or aisi c1013 assn standard 4th material response or sae 1010 assn standard 5th material response or sae 1012 assn standard all material responses