MIL-DTL-28804D
4.17.19 Fluid immersion (see 3.6.18). Unmated connectors shall be immersed fully in the fluids specified below for the required
periods. At least one connector shall be immersed in each fluid. After removal from the fluid, each connector shall remain for 1
hour in free air at room conditions. Subsequent testing shall be performed on connectors mated with the same mating connectors
used previously in the test. The connectors shall be mated by hand. Following mating, connectors shall be cleaned in a suitable
solvent to remove hydraulic fluid and lubrication oil.
a. Hydraulic fluid conforming to MIL-PRF-87257 for 20 hours.
b. Lubricating oil conforming to MIL-L-23699 for 20 hours.
4.7.20 Crimp contact deformation (see 3.6.19). Contacts shall be tested in accordance with method 2001 of MIL-STD-1344.
The test shall be performed on at least 40 contact pairs, selected so that 20 pairs having the maximum wire size and 20 pairs
having the minimum wire size are tested.
4.7.21 Contact pin strength (see 3.6.20). Unless otherwise specified (see 3.1), removable contacts shall be mounted in a
suitable fixture and a load applied to the pin as shown on figure 4. The rate of travel of the testing machine shall not exceed 1 inch
(25.40 mm) per minute, and the load shall be maintained for 1 minute. The permanent set shall be the difference between the
initial and final position of the point of load application after load removal. The test shall be performed on at least 40 contacts.
L
.8L
MIN
60
MAX
PERMANENT SET
LOAD
L = FULL ENGAGEMENT LENGTH
(INCHES)
FIGURE 4. Contact pin strength.
4.7.22 Crimp tensile strength (see 3.6.21). Crimp contacts shall be tested in accordance with method 2003 of MIL-STD-1344.
Contacts shall be crimped using a tool specified in MIL-C-22520/2. The test shall be performed on a least 40 contact pairs. These
shall be selected so that 20 pairs have the maximum wire size and 20 pairs have the minimum wire size (see 4.5.1).
4.7.23 Altitude immersion (classes P and E) (see 3.6.22). Mated connectors shall be tested in accordance with method 1004 or
MIL-STD-1344, the following details shall apply:
a. All wire ends shall be located within the chamber and exposed to the chamber atmosphere but not submerged or sealed.
b. At the end of the third cycle, while the connectors are still submerged in the solution, the insulation resistance shall be
measured as specified in 4.7.8 and the dielectric withstanding voltage test shall be performed as specified in 4.7.7.
4.7.24 Resistance to soldering heat (see 3.6.23). All connectors with solder termination's shall be tested in accordance with
EIA-364-56. The connectors shall be tested in accordance with procedure 3 or 4 as specified (see 3.1). If no procedure is
specified, connectors shall be tested in accordance with procedure 3.
4.7.25 Solderability (printed wiring tails only) (see 3.6.24). Solderable, non-removable printed wiring tails shall be tested in
accordance with method 208 of MIL-STD-202, (type R or RMA flux may be used).
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