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:
Qq-s-633-canc federal specification 1st material response or qq-w-409, grade 2 federal specification 2nd material response or qq-w-409, grade 2 federal specification 3rd material response or qq-w-409, grade 2 federal specification 4th material response or qq-w-409, grade 2 federal specification 5th material response or qq-w-409, grade 3 federal specification 6th material response or qq-w-409, grade 4 federal specification 7th material response or qq-w-409, grade 4 federal specification 8th material response or qq-w-409, grade 4 federal specification 9th material response or qq-w-409, grade 4 federal specification 10th material response or qq-w-409, grade 4 federal specification 11th material response or qq-w-409, grade 4 federal specification 12th material response or qq-w-409, grade 4 federal specification 13th material response or qq-w-409, grade 4 federal specification 14th material response