MIL-DTL-28748D
TABLE IV. Contact retention.
Mating
Pounds
end size
22
6
20
10
16
20
3.5.5 Contact insertion and removal forces (removable contacts only). When tested as specified in 4.7.7, the axial forces required
to insert and remove removable contacts shall not exceed 15 lbf (67 N).
3.5.6 Temperature cycling. When the connectors are tested as specified in 4.7.8, there shall be no evidence of physical damage.
Following temperature cycling, the dielectric withstanding voltage shall meet the requirements of 3.5.3.
3.5.7 Humidity. When the connectors are tested as specified in 4.7.9, the insulation resistance shall be not less than 100
megohms and the dielectric withstanding voltage shall meet the requirements of 3.5.3.
3.5.8 Vibration. When the complete connector assembly, wired with the appropriate size wire, is tested as specified in 4.7.10,
there shall be no cracking, breaking, or loosening of parts. There shall be no loss of electrical continuity of any contact circuits of
more than 1 microsecond with 100 milliamperes minimum flowing in each contact circuit. After vibration test, the connector assembly
shall show no signs of loosening, fracture, or other deterioration (see 3.3.7).
3.5.9 Shock (specified pulse). When tested as specified in 4.7.11, there shall be no evidence of failure of metallic or dielectric
materials, nor shall the mated portions of the connector become disengaged. There shall be no loss of electrical continuity of any of
the contact circuits of more than 1 microsecond with 100 milliamperes minimum flowing in each contact circuit.
3.5.10 Insertion and withdrawal force (connector assembly). When tested as specified in 4.7.12, the force required to engage or
separate any pair of mated connectors (plug and receptacle) shall not exceed 1 pound times the number of contacts specified on the
applicable specification sheet or military standard (see 3.1).
3.5.11 Durability. When connector assemblies are tested as specified in 4.7.13, there shall be no evidence of electrical or
mechanical damage that impairs the normal operation of the connector.
3.5.12 Contact resistance. When contacts in the mated condition are tested as specified in 4.7.14, the contact resistance shall be
as specified in table V.
TABLE V. Contact resistance.
Conta
Test current
Initial
After
ct
amperes
volts
conditioning
size
(max)
(max)
volts (max)
22
5.0
.060
.070
20
7.5
.055
.065
16
13.0
.050
.060
3.5.13 Salt spray (corrosion).
3.5.13.1 Connectors. When connectors are tested as specified in 4.7.15, there shall not be sufficient corrosion to interfere with
mating or unmating the connectors. Following the salt spray test, the dielectric withstanding voltage shall meet the requirements of
the conditioning values specified in table III. Contact resistance shall not exceed the requirements of 3.5.12.
3.5.13.2 Nonremovable contacts. When nonremovable contacts are tested as specified in 4.7.15, any corrosive products
resulting therefrom shall not cause exposure of base metal on the sets of pin and socket contacts.
3.5.14 Low level circuit (for nonremovable contacts). When tested as specified in 4.7.16, the values of contact resistance shall
not exceed the potential drop in table VI.
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