MRC:
The lettering or design on the item,or that is the item.AYBM
Inscription:
Approx. Holding torque 275, 500, 550, 700, max. Torque 375, 700, 750, 850, 6 2 4
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:
Qq-a-250/8, alloy 5052, h34 federal specification 1st material response or qq-a-250/1, alloy 1100, h24 federal specification 2nd material response