MIL-PRF-28876E
3.12.2 Insert retention axial strength. When tested in accordance with
4.6.4.2, connector inserts shall withstand an applied minimum pressure of 100
pounds per square inch (0.69 Mpa) in both the forward direction and the
backward direction for a minimum period of 1 minute without cracking,
breaking, or being dislocated from their normal positions in the connector
shell. No axial displacement detrimental to performance shall be observed
between the inserts and their shell body during or after the test exposure.
3.12.3 Terminus insertion and removal forces. Connectors shall be tested
in accordance with 4.6.4.3. The terminus insertion force and the force
required to remove unlocked termini shall not exceed 22.0 pounds (98 N).
3.12.4 Terminus retention force. When tested in accordance with 4.6.4.4
and subjected to axial loads of 22.0 pounds (98 N) termini shall be retained
in their inserts and axial displacements of the termini shall not exceed 0.015
inch (0.38 mm).
3.12.5 Maintenance aging. Connectors with removable termini shall be
tested in accordance with 4.6.4.5. Connectors shall show no visible evidence
of wear or deformation which may degrade their ability to perform as
specified. The terminus insertion and removal forces requirement of 22.0
pounds (98 N) (see 3.12.3) shall be met.
3.12.6 Connector coupling engagement and disengagement torque. When tested
in accordance with 4.6.4.6, the maximum coupling ring and coupling screw
engagement and disengagement torques shall be as specified in table III.
TABLE III.
Connector coupling engagement
and disengagement torques.
Connector coupling
Connector
shell size
engagement
and disengagement
torque (inch-
pounds (N-m))
11
15 (1.7)
13
15 (1.7)
15
25 (2.8)
23
50 (5.7)
3.12.7 Backshell and insert retention nut attachment. When tested in
accordance with 4.6.4.7, the minimum backshell or insert retention nut
disengagement torque shall be as specified in table III. No evidence of
excessive thread binding, seal pinching, or any contamination buildup shall be
observed.
3.13
Mechanical requirements
3.13.1 Cable pull out force (connectors with backshells only). When tested
in accordance with 4.6.5.1, the minimum cable to connector pullout strength
shall be 162 pounds (720.3 N). There shall be no evidence of cable jacket
damage, cable strain relief failure, cable to backshell seal damage,
distortion or bending of metallic connector parts, or cable disengagement from
the cable strain relief. The connector shall meet the requirements of 3.11.4
during and after the test.
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