MIL-DTL-26500G
4.4.2.1.3 Disposition of sample units. Sample units which have passed the group B inspection may be
delivered on the contract or purchase order if the lot is accepted and sample units are still within specified
tolerances.
4.5 Periodic inspection. Periodic inspection shall consist of group C. Except where the results of these
inspections show noncompliance with the applicable requirements (4.5.1.1.6), delivery of products which
have passed groups A and B shall not be delayed pending the results of periodic inspections.
4.5.1 Group C inspection. Group C inspection shall consist of tests specified in table X, in the order
shown. Group C inspection shall be performed every 24 months. Scheduling of periodic Group C
inspection after initial qualification shall be established by the qualifying activity. Group C inspection shall
be conducted on sample units selected from inspection lots which have passed the groups A and B
inspections.
4.5.1.1 Sampling plan. Within each 24 month periodic inspection time period, randomly selected
mated connector sample units which have passed groups A and B inspections shall be subjected to the
tests specified in table X. Samples shall be selected in sufficient quantity to provide two samples per
applicable test group.
4.5.1.1.1 Connector samples (classes R, G, F, and E). Four mating pairs of connectors, with insert
arrangements in the densest configuration and including shell sizes representative of production during
the preceding 24-month period, shall be provided. Two samples shall have pin contacts in the plug and
socket contacts in the receptacle and shall be wired with wire approaching the minimum specified in
table I. The remaining samples shall have socket contacts in the plug and pin contacts in the receptacle
and shall be wired with wire approaching the maximum diameter specified in table I. Fifty percent of the
samples with pin contacts in the plug and 50 percent of the samples with socket contacts in the plug shall
be subjected to the tests in group I of table X. The balance of the samples shall be subjected to the tests
in group II of table X. For class F, at least seven mating pairs shall be used for group I.
4.5.1.1.2 Connector samples (class H). Four mating pairs of connectors consisting of a class H solder
mount receptacle and a qualified class R, G, or E plug, with insert arrangements in the densest
configuration, and shell sizes representative of production during the preceding 24-month period, shall be
provided. Two samples shall be wired with wire of nominal gauge for which the contacts are designed
and subjected to the tests in group III of table X. The balance of the samples shall have the full
complement of contacts installed in the plug, but need not be wired, and shall be subjected to the tests in
group IV of table X.
4.5.1.1.3 Connector samples (class K). Six mating pairs of connectors, with insert arrangements in the
densest configuration and with shell sizes representative of production during the preceding 24-month
period, shall be provided. Three sample mated pairs shall have pin contacts in the plug and socket
contacts in the receptacle and shall be wired with wire approaching the minimum diameter specified in
table I. The remaining sample mated pairs shall have socket contacts in the plug and pin contacts in the
receptacle and shall be wired with wire approaching the maximum diameter specified in table I. One pair
each shall be subjected to tests specified in groups V, VI, and VII of table X. Mated pairs shall be defined
as samples of the same shell size and class with pin contacts in the plug and socket contacts in the
receptacle, or samples of the same shell size and class with socket contacts in the plug and pin contacts
in the receptacle.
4.5.1.1.4 Group C failures. If one or more sample units fail to pass group C inspection, the lot shall be
considered to have failed and corrective action shall be taken in accordance with 4.5.1.1.6.
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