MIL-DTL-28731F
4.6 Conformance inspection.
4.6.1 Inspection of product for delivery. Inspection of product for delivery shall consist of table V
(connectors), and table ll (contacts).
4.6.1.1 Inspection lot. An inspection lot shall consist of all the connectors and associated fittings of the
same PIN, produced under essentially the same conditions, and offered for inspection at one time.
4.7 Methods of inspection.
4.7.1 Visual and mechanical inspection. Connectors and associated fittings shall be inspected to verify
that the design, construction, physical dimensions, interchangeability, marking, and workmanship are in
4.7.2 Insulation resistance (see 3.6.1). The insulation resistance shall be measured between closest
adjacent contacts and hardware in accordance with test procedure EIA-364-21. Any number of contacts
may be tested simultaneously. The measurements shall be made with the contacts inserted into the
molded insert. The test potential tolerance shall be 2 percent and the electrification time shall not exceed
1 minute.
4.7.3 Temperature cycling (see 3.6.2). Complete mated connectors shall be subjected to temperature
cycling in accordance with test procedure EIA-364-32. The temperature shall be -55°C to 125°C.
4.7.4 Dielectric withstanding voltage (see 3.6.3). The unmated connectors shall be tested in
accordance with test procedure EIA-364-20. The connectors shall show no evidence of flashover when
the specified voltage (see 3.1) is applied. The voltage shall be applied between contacts and hardware as
connected for insulation resistance (see 4.7.2).
4.7.5 Contact retention (see 3.6.4). Connectors shall be tested in accordance with test procedure
EIA-364-29. Axial loads shall be applied to individual contacts in unmated connectors in the normal
removal direction. The load shall be applied uniformly at a rate of 1 pound per second. After 5 insertions
and withdrawals from the same contact hole, the contacts shall withstand the specified axial load.
4.7.6 Vibration (see 3.6.5). Complete mated connectors shall be vibrated in accordance with test
procedure EIA-364-28, Condition II. All contacts shall be wired in series with the appropriate size wire and
connected to a suitable testing circuit. The mated connectors shall be held together only by the normal
locking device. Strain relief shall be provided by the use of junction shells when applicable. Wires shall
be supported on a stationary frame not closer than 12 inches from the connectors.
4.7.7 Mechanical shock (see 3.6.6). Either high impact shock or specified pulse shock testing shall be
performed as applicable.
4.7.7.1 High-impact shock. Complete mated connectors shall be tested in accordance with method 207
of MIL-STD-202. All contacts shall be wired in series with the appropriate size wire and 100 mA +10/ -0,
current flowing through the test contacts. The mated connectors shall be held together only by the normal
locking device. Strain relief shall be provided by the use of junction shells where applicable. Wires shall
be supported on a stationary frame not closer than 12 inches from the connectors.
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