MIL-DTL-22442G
4.5.8 Low temperature flexibility. The cable assembly or portion thereof containing a
"Y" junction/crotch or molded section (see 6.5 g) or heat-shrunken transition (see 6.5 d, e, and f)
shall be aged in a circulating air oven for a minimum of 48 hours at 160 ±2 °F. The cable
assembly shall then be conditioned for a minimum of 8 hours at the temperature specified in
3.5.6. This temperature shall be continuously recorded during conditioning and testing. Each
crotch or molded section (see 6.5 d and g) shall be held in a mechanical device so that the
portion of the cable entering a "Y" junction/crotch or molded section flexes when the cable is
flexed. The cable shall be flexed mechanically. Any part of a mechanical device which will be
in contact with the test specimen shall be cold conditioned. At the end of the conditioning period
and while at the conditioning temperature, the cable shall be flexed rapidly for 30 cycles through
a 180-degree arc (± 90 degrees from 0 degrees). The flexing procedure shall be repeated in a
plane 90 degrees to the plane of initial flexing. At the conclusion of the test, the specimen shall
be examined visually at room temperature under 3X magnification and electrically tested for
conductor continuity.
4.5.9 Durability. Unless otherwise specified in the connector specification sheet, all
connectors of the cable assembly shall be mated and unmated 100 times. MIL-DTL-26482 or
equivalent type connectors (as approved by the qualifying activity) shall be mated manually or
automatically at a rate not to exceed 12 cycles per minute, and shall be torqued to the value
specified in the applicable MIL-DTL-26482 specification sheet. Quick disconnect connectors
shall be unmated by breaking the connectors in a direction perpendicular to the axial plane and
major axis. All other connector types shall be mated and unmated in the axial direction, at a rate
not to exceed 12 cycles per minute.
4.5.10 Ozone resistance. The cable assembly shall be tested for ozone resistance in
accordance with ASTM-D1149 with the following test conditions: Test time shall be 168 ± l
hour, ozone concentration shall be 50 parts per 100,000,000, and the chamber temperature shall
be 100 ± 5 °F. Any bend relief or a cordage intersecting a molded junction shall be bent at an
angle of 90 degrees over the mandrel while in the chamber. In addition, the cable jacket shall be
wrapped around the mandrel. The mandrel radius shall be based on the cross sectional area of
the bend relief or a cordage intersecting a molded junction.
Mandrel Radius
Specimen Cross Section
Up to 0.500
4 X Cross Section
0.501 to 0.750
5 X Cross Section
0.751 to 1.250
6 X Cross Section
NOTE: Cable manufacturers may submit certification of ozone resistance for polyurethane
materials to the testing activity for approval in lieu of performing this test.
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