MIL-STD-1168C
Example 2:
Lot XYZ09C600-007 was produced. During lot acceptance, defects are found and the lot is initially rejected. The manufacturing activity conducts screening and divides the lot into three groups: conforming, reworkable, and
nonconforming. The screened and conforming portion is assigned suffix A so the lot number becomes XYZ09C600-007A. The portion that was screened and reworked to a conforming condition is assigned suffix B so the lot number becomes XYZ09C600-007B. The nonconforming portion was assigned suffix C for a lot number of XYZ09C600-007C. The Government then accepted the A and B suffixed lots and determined the nonconforming suffixed lot C could be used as destructive test samples.
Example 3:
Lot YYY11F200-001 is rejected during lot acceptance testing due to the identification of a critical defect escape. The manufacturing activity then performs a radiographic rescreening and issues a suffix of A to those that were determined to be acceptable. Since it was a critical defect that could not be reworked or repaired, the nonconforming product was discarded. With the completion of the rescreening, root cause analyses, corrective action, and update
to the ADC, the Government then accepted the rescreened lot YYY11F200-001A.
4.6.6 Suffixing of lots after Government acceptance. When a lot of ammunition or a quantity thereof has been designated for rework, repair, modification, or overhaul, at
a facility other than the original plant (such as a depot, station, field, ship, base, etc.), then a unique suffix shall be assigned (see 6.12). The first operation or maintenance
performed on a lot of ammunition or a quantity thereof shall be identified by affixing a capital letter suffix "A", the next change or rework of the same basic lot or quantity thereof for the same item shall be identified by the addition of a "B" suffix, etc., as described in the following example. When lots are assigned a suffix during production (see 4.6.5) and later require reworking in the field, the next available sequential alpha character will be assigned to identify the quantity being reworked in accordance with exceptions noted in 4.6.4.
Example:
a. The original quantity of VVV97J002-012 is 10,000 rounds. Three (3) years later 2,000 rounds at Depot 1 are defuzed and plugged. This 2,000 quantity now becomes VVV97J002-012A.
b. Depot 2 has 3,000 rounds of the same basic lot. Four (4) years later it is found that 1,000 of these rounds need replacement primers. The 1,000 are then identified as VVV97J002-012B. The 2,000 rounds with the original primer at depot 2 remain as VVV97J002-012.
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