D38999/49 Defense Supply Center, D38999/49 Datasheet - Page 45

• Manufacturer Part Number: D38999/49
• Description: D38999K / D38999J 500 Cycle Contact
• Manufacturer: Defense Supply Center

exposed to 150 C for finish A of series I and II, 175 C for finishes B and X of series I and II, and classes J,
W and X of series III and IV, and 200 C for all other finishes and classes for 1,000 hours minimum. After
the connectors return to ambient temperature, they shall be unmated and the contact locations remeasured
with approximately 2 pounds axial load applied to seat the contact back against the retention device.
be subjected to an ambient temperature of 175 C +3 C, -0 C for classes J, X and W, and 200 C +3 C, -0 C
for all others. The temperature shall be maintained for 1,000 hours.
containing the pin contacts shall be firmly mounted in a vertical position pins facing up. A salt-water
solution (5 percent salt by weight) shall be poured onto the pin interface until the solution level just reaches
the pin tips. The solution shall remain in the connector for a minimum of 30 seconds and then poured out,
lightly shaking excesses from the connector. The counterpart plug shall immediately be mated with the
receptacle. One cell pattern, with all contacts adjacent to a central contact at a positive polarity and the
center contact at a negative polarity, shall be set up at a location giving the most uniform distribution of
contacts adjacent to the center contact. A potential of 60 volts dc shall be applied between the contacts
adjacent to the center contact. The contacts shall be energized for 40 hours. Following this, with the
voltage disconnected, the connectors shall be unmated and the pin contacts removed (except for
hermetics). The contacts shall be examined using 3X magnification for erosion to base metal.
shall be subjected to the test specified in method 1009 of MIL-STD-1344. The following detail and
exception shall apply:
any method which will give results within ±10 percent of the true thickness.
engagement and separating force shall be measured as specified in MIL-C-39029.
shall be performed as specified in MIL-C-39029 except contacts shall be installed in connector.
for 1 minute and then placed in an ambience of -65 C for 1 hour. A minimum of three such cycles shall be
performed until the connector surfaces are completely iced over. Immediately after removal from the last
cycle, the frozen connectors shall be uncoupled and then recoupled. The connectors shall be uncoupled
and recoupled a second time with the uncoupling and coupling torque measured in accordance with 4.5.6.
The uncoupling and coupling torque shall not be measured on the first uncoupling and recoupling.
and dust test of method 110 of MIL-STD-202.
MIL-STD-1344.
with 3.43 and 3.44 to determine the effects of previous testing. Any evidence of cracking, loosening of
parts, carbon tracking, excess wear, or missing parts shall be recorded.
in the finished connector shall be tested in accordance with ASTM E595-84. Samples to be tested shall
have been processed in the same manner as that used in production of the qualification lot.
4.5.40 Dust (fine sand) series I, III, and IV (see 3.46). Mated connectors shall be subjected to the sand
4.5.33.2 High temperature exposure (series III, except hermetics) (see 3.37.2). Mated connectors shall
4.5.34 Electrolytic erosion (series III and IV) (see 3.38). The wired receptacle half of the connector
4.5.35 Firewall (classes K and S connectors) (see 3.39). The mated, torqued, and wired connectors
4.5.36 Contact plating thickness (hermetic) (see 3.40). Contact plating thickness shall be measured by
4.5.37 Contact engagement and separating force (hermetic sockets only) (see 3.41). Contact
4.5.38 Resistance to probe damage (hermetic sockets only) (see 3.42). Resistance to probe damage
4.5.39 Ice resistance series I, III, and IV (see 3.45). Mated connectors shall be immersed in tap water
4.5.41 Magnetic permeability (see 3.3.4). Connectors shall be tested as specified in method 3006 of
4.5.42 Post test examination. The tested connectors and contacts shall be examined for compliance
4.5.43 Thermal vacuum outgassing (classes G and H qualification only) (see 3.47). All materials used
Wire bundles to be clamped to fixed points at least 8 inches (203.2 mm) behind the connector.
MIL-DTL-38999K
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