MIL-DTL-27599D
4.5.3.1.5 Noncompliance. If a sample fails to pass group C 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 with essentially the same materials and processes, and which are
considered subject to the same failure. Acceptance and shipment to the product shall be discontinued
until corrective action, acceptable to the qualifying activity has been taken. After the corrective action has
been taken, group C inspection shall be repeated on additional sample units (all tests and examinations,
or the test which the original sample failed, at the option of the qualifying activity). Groups A and B
inspections may be reinstituted; however, final acceptance and shipment shall be withheld until the group
C inspection has shown that the corrective action was successful. In the event of a failure after
reinspection, information concerning the failure shall be furnished to the cognizant inspection activity and
the qualifying activity.
4.5.4 Failures of groups A, B, or C. Lots which fail groups A, B, or C and are not resubmitted for
testing or failed resubmission shall not be shipped.
4.6 Methods of inspection.
4.6.1 Visual and mechanical inspection.
4.6.1.1 Connectors. The connectors, accessories, and piece parts shall be visually and mechanically
examined to ensure conformance with the specification and the applicable military standards (see 1.1.1,
3.1, 3.3, 3.4, 3.5 and 3.27). The contractor may use in-process controls to satisfy these requirements.
4.6.1.2 Contacts. The contacts shall be visually examined for mechanical defects (see 1.1.1, 3.1,
3.3, 3.4, and 3.27). The contacts shall be inspected through a device having a magnification power of
approximately 3 diameters. The contractor may use in-process controls to satisfy these requirements.
4.6.2 Temperature cycling (see 3.6). Mated connectors shall be subjected to the temperature cycling
test procedure EIA-364-32, test condition I except that steps 2 and 4 shall be of 2 minutes maximum
duration. The temperature of step 1 shall be -65ºC +0, -5ºC and the temperature of step 3 shall be 150ºC
for finish A of series I and II, 175ºC for finish B of series I and II.
4.6.3 Air leakage (see 3.12). The connector shall be subjected to test procedure EIA 364-02.
Pressure differential across the connector shall be 1 atmosphere.
4.6.4 Coupling torque (see 3.7). For qualification testing, mating halves shall be coupled and
uncoupled; the forces or torques which must be applied to facilitate full coupling and uncoupling shall be
measured and recorded. For quality conformance, suitable gauges may be used instead of the
appropriate counterparts.
4.6.5 Durability (see 3.8). The wired, assembled plugs and receptacles shall be mated and unmated
250 cycles at a rate of 200 cycles per hour maximum. The mating and unmating shall be accomplished
so that the plug and receptacle are completely separated during each cycle.
4.6.6 Insulation resistance (see 3.9). Unmated connectors shall be tested as specified in test
procedure EIA 364-21. The following details and exceptions apply:
a. The tolerance on the applied voltage shall be ± 10 percent.
b. Connectors shall be mated when testing after humidity.
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