MIL-DTL-26518C
4.7.15 Salt spray (corrosion) (see 3.6.14). Wired specimens of connectors shall be subjected to a salt spray test in accordance
with MIL-STD-202, method 101, test condition B. Immediately after exposure, the exterior surface of the connectors shall be
thoroughly washed with tap water. The specimens shall then be dried in a circulating air oven at a temperature of 38°C, +3°C, -0°C
for a maximum period of 12 hours. The specimens 5 shall then be removed and inspected.
4.7.16 Temperature life (see 3.6.15). The mated connectors shall be subjected to an ambient temperature of 200°C, +3°C, -0°C
for a period of 1000 hours. The contacts shall carry sufficient current, not exceeding the rated current, to maintain a contact
temperature of 238°C, +3°C, -0°C.
4.7.17 Contact resistance (see 3.6.16). This test shall be conducted at both of the temperatures specified in MIL-C-39029 before
and after durability and corrosion testing.
4.7.18 Ozone exposure (see 3.6.17). The unmated connectors shall be subjected to ozone having a concentration from 0.010 to
0.015 percent by volume for 2 hours at room temperature. At the end of the specified period, the samples shall be examined for signs
of ozone deterioration.
4.7.19 Insert retention (see 3.6.18). Unmated connectors shall be subjected to axial loads in either direction separately as
specified herein. The loading shall be increased gradually at an approximate rate of 1 pound per second until the specified load is
reached. The specified load shall be maintained for 5 seconds. The load-applying device may be shaped as necessary to reduce the
pressure at individual points.
4.7.20 Air leakage.
4.7.20.1 Air leakage, class R (see 3.6.19.1). Class R wired connectors shall be mounted in a test apparatus, arranged to permit
application of a 30-psi pressure differential across the connector. The test shall be performed in both directions after 33 minutes of
exposure to the low temperature extreme specified in table III and while samples are at the low temperature. Means shall be provided
for determining leakage of air through the connector.
4.7.20.2 Air leakage, class H (see 3.6.19.2). Class H connectors shall be mounted in a test apparatus for the application of the
specified test pressure across the connectors. Prior to test at least 10 percent, with a minimum of 3 of the contacts, shall have short
wires soldered into normal service positions. Means shall be provided for determining leakage of air or of pressurized gas, containing
not less than 10 percent helium by volume 3 through the connector while the specified pressure is applied.
4.7.21 Contact retention (see 3.6.20). An axial load as shown in table V shall be applied to the contacts of the unmated
connectors in both directions. The axial rate of load application shall be approximately one pound per second after the slack of the
contact has been taken up. The connector shall have all the contacts in place during the test and shall meet the requirements of
3.6.20.
4.7.22 Altitude Immersion (see 3.6.21). Connectors shall be immersed in a container of water at approximately 20°C and placed in
a chamber. A quantity of salt, 5 percent by weight shall be added to make the water conductive. The chamber pressure shall be
reduced to approximately 1 inch (2.54 cm) of mercury and maintained for a period of 30 minutes. The chamber pressure shall then be
returned to atmospheric pressure and while at the submerged condition, the insulation resistance requirements specified in 3.6.13.1
shall be met. This shall be considered to be one cycle. Two additional environmental cycles shall be run. At the end of the last cycle,
the electrical tests conducted at the end of the first cycle shall be repeated, and a dielectric withstanding voltage of 1500 volts rms
shall be applied between the same points as those used for insulation resistance measurements. The voltage shall be applied while
the connectors are still immersed, but at sea level. Rate of pressure change shall be 10,000 feet (3.05 km) per minute. The test
voltages for shielded contacts shall be 1,000 volts rms between inner conductor and shield, and closest adjacent shields to shell and
shell.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2).
When actual packaging of material is to be performed by DoD personnel, these personnel need to contact the responsible packaging
activity to ascertain requisite packaging requirements. Packaging requirements are maintained by the Inventory Control Point's
packaging activity within the Military Department or Defense Agency, or within the Military Department's System Command.
Packaging data retrieval is available from the managing Military Department's or Defense Agency's automated packaging files, CD-
ROM products, or by contracting the responsible packaging activity.
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