MIL-DTL-9177C
4.6.17 Static load (see 3.6.16). A static load of 150 pounds minimum shall be applied to the connector
at approximately midpoint for 1 minute (minimum). The connector shall be resting in a horizontal position
on a concrete floor or rigid metal surface. The load shall be applied perpendicular to the longitudinal axis
of the connector through a rigid bar 0.50 ± 0.25 inch (12.70 ± 6.35 mm) wide placed tangent to the shell
surface and parallel to the floor or surface supporting the connector.
4.6.18 Shell impact (see 3.6.17). With the connector in a horizontal position, the shell of the connector
shall be subjected to the impact of a 3 ounce (minimum) weight dropped three times from a height of 6
feet (minimum) onto the shell of the connector. The weight shall be a solid brass cylinder having a
diameter of 3/8 ± 1/16 inch (9.53 ± 1.59 mm). The weight shall be dropped through a vertical 1/2 ± 1/16
inch (12.7 ± 1.59 mm), inside diameter tube, so positioned that the weight strikes the shell approximately
midway between the ends of the shell.
4.6.19 Contact spring pressure (see 3.6.18).
4.6.19.1 Mated connectors (see 3.6.18.1). The specified mating connector (see 3.1) conforming to the
applicable specification shall be used. Each set of contacts shall be monitored for electrical continuity
with a detector capable of detecting interruptions of 1 microsecond or longer with at least 100
milliamperes dc flowing through the set of contacts. Force shall be applied to the contact spring close to
the point of contact in a direction perpendicular to and away from the connector axis. The force required
to interrupt the monitor circuit shall be as specified in 3.6.18.1.
4.6.19.2 Unmated connectors (see 3.6.18.2). While in the unmated state, each contact spring shall be
subjected to a force of 12 ounces minimum applied in a direction perpendicular to the connector axis
away from the connector body.
4.6.20 Spring life (see 3.6.19). A standard steel test pin having the dimensions of the specified mating
connector (see 3.1) conforming to the applicable specification sheet shall be used. The connectors
should be lubricated, but the lubricant shall be removed at the completion of the last cycle of insertion and
withdrawal. The test connector shall be subjected to 5,000 cycles of mating and unmating with the
specified mating connector. The test connector shall then be examined for damage and loosening of
parts, after which the contact resistance, dielectric withstanding voltage and insertion and withdrawal
4.6.21 Frame strength (see 3.6.20). With the axis of the connector mated in a horizontal plane to a solid
steel plug conforming to the dimensions of plug M9177/1-1, a 20-pound (minimum) load shall be freely
suspended from the cord end of the connector for a minimum of five minutes in each of four 90 degree
positions.
4.6.22 Spring attachment clip life (see 3.6.21). The spring attachment clip shall be subjected to 25,000
cycles of full opening and full closing of the clip jaws.
4.6.23 Cable retention (see 3.6.22). The specified cable (see 3.1) shall be assembled to the test
connector. The connector body shall be secured and a tensile load applied to the cable parallel to the
axis of the connector. The force shall be held for 30-seconds minimum. The force shall be as specified
(see 3.1).
4.6.23.1 Anti-rotation detents (see 3.6.22.1). The specified cable (see 3.1) shall be assembled to the test
connector. The connector body shall be secured and the cable shall be clamped close to the point that it
exits the connector body. A twisting force of seven pound-inches shall be applied to the cable in each
direction for a minimum of one minute.
4.6.24 RFI shielding (see 3.6.22.2). The RFI shielding effectiveness of mated connectors with RFI shells
shall be measured in a triaxial radio frequency leakage fixture shown on figure 4. The RFI leakage from
the conductor inside the connector in the inner coaxial line into the outer coaxial line shall be measured at
the frequencies specified in 3.6.22.2 within a frequency accuracy of ± 5 percent. The level of detected
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