MRC:
The element,compound,or mixture of which an item is fabricated,excluding any surface treatment.MATL
Material:
Steel, federal standard 66, comp 1060 or steel, federal standard 66, comp 1061 or steel, federal standard 66, comp 1064 or steel, federal standard 66, comp 1065 or steel, federal standard 66, comp 1066 or steel, federal standard 66, comp 1069 or steel, federal standard 66, comp 1070 or steel, federal standard 66, comp 1072 or steel, federal standard 66, comp 1074 or steel, federal standard 66, comp 1075 or steel, federal standard 66, comp 1078 or steel, federal standard 66, comp 1080 or steel, federal standard 66, comp 1084 or steel, federal standard 66, comp 1085 or steel, federal standard 66, comp 1086 or steel, federal standard 66, comp 1090
MRC:
Consists of plating,dip,and/or coating that cannot be wiped off.plating and/or coating is any chemical and/or metallic additive,electrochemical,or mild mechanical process which protects a surface.SURF
Surface Treatment:
Zinc plated, mil-c-81562, type 2, class 2 or zinc, qq-z-325, type 2, class 3