MRC:
Characteristics or qualities of an item,not covered in any other requirement,which are considered essential information for one or more functions excluding nsn assignment.SUPP
Supplementary Features:
Rr-170a/al, cartridge, 8.06 in. Lg, 0.97 in. W, 0.97 in. H, packaged 30 ea per fiberboard ctn, 1 ctn per moisture vaporproof barrier bag, 4 bags per weather resistant fiberboard ctn
MRC:
A feature of the item of supply which must be specifically recorded when the reference number covers a range of items.ZZZY
Reference Number Differentiating Characteristics:
As differentiated by unit package quantity and unit package type
