MRC:
The element,compound,or mixture of which the item is fabricated,excluding any surface treatment,and its location.ANNQ
Material And Location:
Wire, steel, music, qq-w-470 spring and steel, federal standard 66, comp 302, 303, or 304 or steel, federal standard 66, comp 304 or steel, federal standard 66, comp 316
MRC:
The 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 the surface of the item and its location.ANNR
Surface Treatment And Location:
Passivated, mil-std-171, 5.4