MIL-PRF-23648F
4.6.3.1 Subgroup 1. A sample of parts shall be randomly selected in accordance with table VIII. If one
or more defects are found, the lot shall be screened and defectives removed. After screening and
removal of defectives, a new sample of parts shall be randomly selected in accordance with table VIII. 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 VIII. Group B sampling plan.
Lot size
Sample size
3
1 to
25
5
26 to
50
6
51 to
90
7
91 to
150
10
151 to
280
11
281 to
500
15
501 to 1,200
18
1,201 to 3,200
22
3,201 to 10,000
29
10,001 and over
4.6.3.2 Subgroup 2. Twelve samples shall be selected randomly from each inspection lot. If one or
more defects are found, the lot shall be screened and defectives removed. After screening and removal
of defectives, a new sample of twelve parts shall be randomly selected. If one or more defects are found
in the second sample, the lot shall be rejected and shall not be supplied to this specification.
4.6.3.3 Disposition of sample units. Sample units that have passed group B inspection shall not be
delivered on the contract or purchase order.
4.7 Periodic inspection. Periodic inspection shall consist of group C inspection. Except where the
results of these inspections show noncompliance with the applicable requirements (see 4.7.4), delivery of
products which have passed group A and B inspections shall not be delayed pending the results of these
periodic inspections.
4.7.1 Group C inspection. Group C inspection shall consist of the tests specified in table IX, in the
order shown. They shall be performed on sample units of each style and characteristic selected from lots
that have passed group A and group B inspections. The sample units used in group B inspection are not
to be used in group C inspection.
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