MIL-DTL-24308G
TABLE XIII. Lot and sample size.
Lot size
Sample size
2 to 12
100%
13 to 150
13
151 to 280
20
281 to 500
29
501 to 1,200
34
1,201 to 3,200
42
3,200 to 10,000
50
10,001 to 35,000
60
35,001 to 150,000
74
150,001 to 500,000
90
500,001 and over
102
4.4.2 Retention of qualification. Retention of qualification inspection on connectors shall consist of the
examinations and tests shown in table XI. Shipment shall not be held up pending the results of this inspection.
4.4.3 Periodic inspection. Periodic inspection shall consist of group B inspection, except where the results of this
inspection show noncompliance with the applicable requirement (4.4.3.1.4). Delivery of products, which have passed
group A, shall not be delayed pending the results of these periodic inspections.
4.4.3.1 Group B inspection. Group B inspection shall consist of the inspections specified in table XI, in the order
shown. Group B inspection shall be made on sample units which has been randomly selected from inspection lots,
which have passed the group A inspection.
4.4.3.1.1 Sampling plan.
Group I: Sample connectors consisting of two mated pairs of each class, of each type, of each style of
termination, with the largest insert arrangement and all the nonmetallic materials, including lubricants,
of one connector of classes D, K, and M for which retention of qualification is desired shall be selected
every 36 months. If production of a particular PIN is not current, the group B tests must take place at
the time production is resumed. The testing shall revert to the original schedule, which is applied to a
newly qualified product. If group B testing on classes G and N, D and M, or G, N, D, M is desired, one
completely assembled plug and receptacle of each class shall be subjected to the examinations and
tests in lieu of two of a single class.
Group II: One each of plug and receptacle with the largest insert arrangement being tested shall be submitted.
Group III: Twenty contacts each for pin and socket solder type termination being tested shall be submitted for
solderability requirements, and eight pin contacts of each type being tested shall be submitted for
contact and pin strength requirements.
4.4.3.1.2 Failures. If any sample units fail to pass group B inspection, the entire sample shall be considered to
have failed.
4.4.3.1.3 Disposition of sample units. Sample units, which have been subjected to group B inspection, shall not be
delivered on the contract.
4.4.3.1.4 Noncompliance. If a sample fails to pass group B inspection, the manufacturer shall notify the qualifying
activity and the cognizant inspection activity of such failure and take corrective action on the materials or processes,
or both, as warranted, and on all units of product which can be corrected and which were manufactured using
essentially the same materials and processes, and which are considered subject to the same failure. Acceptance and
shipment of the product shall be discontinued until corrective action, acceptable to the qualifying activity has been
taken. After the corrective action has been taken, group B inspection shall be repeated on additional sample units (all
inspections, or the inspection which the original sample failed, at the option of the qualifying activity). Group A
inspection may be reinstituted; however, final acceptance and shipment shall be withheld until the group B inspection
has shown that the corrective action was successful. In the event of failure after inspection, information concerning
the failure shall be made available to the cognizant inspection activity and the qualifying activity.
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