MIL-DTL-55116D
3.6 Mechanical requirements.
3.6.1 Contact depression. The force required to depress the contacts of connectors with non-rigid
contacts to the distance specified in 4.8.1 shall not exceed 1.75 lbs. or be less than 1.25 lbs. per
individual contact. For 5 contacts, total contact depression force shall not exceed 8.75 lbs. or be less
than 6.25 lbs. For 6 contacts, total depression force shall not exceed 10.5 lbs. or be less than 7.5 lbs.
(see 4.8.1).
3.6.2 Air pressure. Connectors shall show no evidence of leakage through the connector when tested
in accordance with 4.8.2.
3.6.3 Mating action. After 3000 matings, in accordance with 4.8.3, connectors shall show no
mechanical damage, and the dielectric, contact resistance, and air pressure, in accordance with 3.5.1,
3.5.3 and 3.6.2 respectively, shall be met.
3.6.4 Contact retention. The individual contacts shall be capable of withstanding an axial load of at
least 10 pounds when tested in accordance with 4.8.4.
3.6.5 Interchangeability. When tested in accordance with 4.8.5, like units, assemblies, and
subassemblies shall be physically and functionally interchangeable without modification of such items or
of the connector. Individual items shall not be handpicked for fit. Reliance shall not be placed on any
unspecified dimension, characteristics, etc.
3.6.6 Compression. When connectors are tested in accordance with 4.8.6, there shall be no evidence
of distortion or damage to the connectors that would affect form, fit, or function.
3.6.7 Pull test. When mated and tested in accordance with 4.8.7, connectors shall withstand an axial
pull of not less than 40 lbs applied to the shell, and 25 lbs applied to the cable. In each instance the
weight is to be applied abruptly.
3.7 Service conditions.
3.7.1 Bounce. After being tested in accordance with 4.9.1, the connectors shall show no evidence of
cracking, breaking or loosening of parts. Following the test, the connectors shall then meet the electrical
requirements of 3.5, air leakage requirement of 3.6.2, and interchangeability 3.6.5.
3.7.2 Vibration. When mated connectors are tested in accordance with 4.9.2, there shall be no
evidence of cracking, breaking, or loosening of parts, and the plug shall not become disengaged from the
receptacle. Following the test, the connectors shall meet the electrical requirements of 3.5 and the air
leakage requirement of 3.6.2.
3.7.3 Drop. Connectors subjected to the test in accordance with 4.9.3 shall show no physical damage
which would affect mateability nor shall there be any loose parts. Following the test, the connectors shall
then meet the electrical requirements of 3.5 and the air leakage requirement of 3.6.2.
3.7.4 Temperature cycling. During the fifth cycle of the test in accordance with 4.9.4, the connectors
shall be capable of being mated and unmated. Following the test, the connectors shall meet the electrical
requirements of 3.5 and air leakage requirements of 3.6.2.
3.7.5 Salt spray. After unmated connectors are tested in accordance with 4.9.5, there shall be no
evidence of base metal corrosion.
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