MIL-PRF-22684F
4.5.1.3 Group A inspection. Group A inspection shall consist of the examination and test specified in table III, and
shall be made on the same set of sample units, in the order shown.
TABLE III. Group A inspection.
Examination or test
Requirement
Method
Number of
paragraph
Paragraph
samples
Subgroup 1
DC resistance
Subgroup 2
Visual and mechanical Examination
Subgroup 3 1/
Solderability
1/ The manufacturer may request the deletion of the Subgroup 3 solderability test, provided an in-
line or process control system for assessing and assuring the solderability of terminations can
be validated and approved by the qualifying activity. Deletion of the test does not relieve the
manufacturer from meeting this test requirement in case of dispute. If the design, material,
construction, or processing of the part is changed or if there are any quality problems, the
qualifying activity may require resumption of the test.
4.5.1.3.1 Sampling plan.
4.5.1.3.1.1 Subgroup 1. A sample of parts from each inspection lot shall be randomly selected in accordance with
table IV, if one or more defects are found, the lot shall be rescreened and defects removed. After screening and
removal of defects, a new sample of parts shall be randomly selected in accordance with table IV, if one or more
defects are found in the second sample, the lot shall be rejected and shall not be supplied to this specification.
Resistance values in the samples shall be representative, and where possible, in proportion to the resistors in the
inspection lot.
4.5.1.3.1.2 Subgroup 2. A sample of parts from each inspection lot shall be randomly selected in accordance with
table IV, if one or more defects are found, the lot shall be rescreened and defects removed. After screening and
removal of defects, a new sample of parts shall be randomly selected in accordance with table IV, if one or more
defects are found in the second sample, the lot shall be rejected and shall not be supplied to this specification.
TABLE IV. Group A sampling plan.
Lot Size
Subgroup 1
Subgroup 2
sample size
sample size
2
to
13
100%
100%
14
to
125
100%
13
126 to
150
125
13
151 to
280
125
20
281 to
500
125
29
501 to
1,200
125
34
1,201
to
3,200
125
42
3,201
to
10,000
192
50
10,001 to
35,000
294
60
35,001 to
150,000
294
74
150,001 to
500,000
345
90
500,001 and over
435
102
9
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