MIL-DTL-28731F
3.6.6 Mechanical shock. When tested as specified in 4.7.7, there shall be no evidence of failure of
metallic or dielectric materials, nor shall the mated portions of the connector become disengaged. For
connectors exposed to the high impact shock test, there shall be no loss of electrical continuity for more
than 20 milliseconds to any of the contact circuits, or 1 microsecond for connectors tested for compliance
to the specified pulse shock test.
3.6.7 Mating and unmating forces (connector assembly). When tested as specified in 4.7.8, the force
and torque required to either engage or separate any pair of mated connectors (plug and receptacle) shall
not exceed the maximum force and torque specified (see 3.1).
3.6.8 Humidity. When tested as specified in 4.7.9, the connectors shall meet the following
requirements:
a. Insulation resistance - Shall not be less than 1,000 megohms.
b. Dielectric withstanding voltage - 50 percent of specified voltage (see 3.8).
3.6.9 Durability. When tested as specified in 4.7.10, the connector assembly shall withstand the test
without evidence of electrical or mechanical damage that impairs the normal operation of the connector.
3.6.10 Salt spray (corrosion). When tested as specified in 4.7.11, there shall not be sufficient corrosion
on the connectors to interfere with mating or unmating, or cause exposure of base metal on contact sets
when inspected at less than 10 power magnification. Following the test, the contacts only shall meet the
following requirement:
a. Low level circuits - Shall not exceed the potential drop values specified in 3.6.15.
3.6.10.1 Contacts supplied in reels. When contacts are separated from the carrier strip, base metal
may be exposed. Following the salt spray test, any corrosion that may occur in the region of the
separation, shall not interfere with the ability of the contacts to meet the subsequent test requirements,
either for contacts tested separately, or as part of the connector, including the ability to mate or unmate
the connectors.
3.6.11 Contact resistance. When tested as specified in 4.7.12, the contact resistance of each mated
pair of contacts shall not exceed the potential drop requirements in table l.
TABLE l. Contact resistance.
Maximum
Contact
Test
Wire size
potential
resistance
current
AWG
drop
(maximum)
(amperes)
(mΩ)
(mV)
6.0
51.0
8.5
18
6.0
45.0
7.5
20
8.0
40.0
5.0
22
8.7
26.0
3.0
24
12.0
24.0
2.0
26
14.7
22.0
1.5
28
20.0
20.0
1.0
30
9
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