MRC:
A listing of those major components,outside the scope of an item of supply to be cataloged,as indicated by the name of the manufacturer,and the name and number of the item as identified by the manufacturer,and the number of each.AJKD
Nonsupply Items And Quantities:
Seat 2, control cylinder 1, valve 1, lock-washer 1, lock-nut 1, lock-pin 1, gasket 1, cap gasket 1
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:
Kit consists of item qty, seat 1, control cylinder 1, valve 1, washer, lock 1, nut, lock 1, pin, lock 1, gasket, seat 1, gasket, cap 1