MIL-PRF-18148D
4.5.11.2 Life test (applies only to receptacles). At the beginning of the test, lightly
lubricate the contact pins of the receptacle, the plug's electrical contact sockets, and the plug's
worm gear with a cotton swab dipped in light lubricating oil. Engage the plug with the
receptacle and mount the combination such that the axis of the contact pins is horizontal. A
cycle is one engagement and one disengagement of the plug and receptacle. Perform
1500 cycles by hand at a rate not greater than 30 cycles per minute. Every 500 cycles, wipe
clean the plug contact sockets, the receptacle contact pins and the connector worm shaft with a
clean soft cloth and relubricate. Examine the receptacle for the requirements of 3.12.10.
4.5.12 Temperature shock test. Subject the connector to the temperature shock test of
MIL-STD-810, method 503.1, procedure I, except that exposure periods shall be 30 ± 5 minutes.
The low-temperature environment shall be -57 ± 2 °C (-70 ± 3.6 °F), and the high-temperature
environment shall be 71 ± 2 °C (160 ± 3.6°F). Examine the connector for the requirements of
3.12.11. Perform the test of 4.5.6.1. Examine the connector for the requirements of 3.12.11.
Subject plugs to the tests of 4.5.8.1 and 4.5.9.1. Examine the plug for the requirements of
3.12.11.
4.5.13 Mechanical shock test. Support the 000-gauge power cables at a point 1.0 ± 0.1
foot below and 1.0 ± 0.1 foot to the side of the axis of the handle of the plug. Connect the plug
or receptacle to its mating connector and mount the combination to the vibration fixture. Support
the plug only by the receptacle. Apply the shocks to the plug through the receptacle only.
Subject the connectors to the shock test of MIL-STD-810, method 516.2, procedure I, figure
516.2-1, amplitude a (basic design), and time duration c. Examine the connector for the
requirements of 3.12.12. Perform the test of 4.5.6.1. Examine the connector for the
requirements of 3.12.12.
4.5.14 Humidity test. Subject the connector to ten cycles of the humidity test of
MIL-STD-810, method 507.1, procedure II, figure 507.1-2. Examine the connector for the
requirements of 3.12.14. Perform the test of 4.5.7.1. Examine the connector for the
requirements of 3.12.14. Subject the plug to the tests of 4.5.8.1 and 4.5.9.1. Examine the plug
for the requirements of 3.12.14.
4.5.15 Immersion. Remove the voltage tap wires and power cables from the plug.
Reassemble the plug (less taps and cables).
4.5.15.1 Test solutions. Unless otherwise indicated by the applicable specification sheet,
the test solutions and periods are:
a. An aqueous solution of potassium hydroxide of 1.30 ± 0.04 specific gravity for
4 ± 0.2 hours. Blue and black receptacles shall be tested for 168 hours at 66° ± 2 °C
(150° ± 3.6 °F).
b. An aqueous solution of sulfuric acid of 1.10 ± 0.05 specific gravity for 4 ± 0.2 hours.
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