MIL-DTL-55116D
4.8.5 Inspection for interchangeability. Connectors shall meet the physical interchangeability
requirements of 3.6.5. Connectors may be gauged, using the gages specified in the applicable
specification sheets, or the interchangeability requirement may be met by verifying the dimensions
specified in the specification and detailed specification sheets.
4.8.6 Compression. The connectors shall be subject to a compression force of 500 pounds applied to
its axis, and shall sustain no damage that will affect performance (see 3.6.6 and fig 3.)
4.8.7 Pull test. The receptacle and plug shall be mated. The receptacle shall be mounted rigidly in a
vertical plane. A device such as a sling or harness shall be affixed to the plug which is below the
receptacle. A dead weight of 40 pounds is placed on the device. Repeat this test by adding 25 pounds to
a device secured to the cable. In each instance, the weight is abruptly placed on the device. At the
completion of the test, the receptacle and plug shall unlock and lock without difficulty, and there shall be
no visible damage (see 3.6.7).
4.9 Service conditions.
4.9.1 Bounce test. The connector shall be placed on a table of a device intended for Package Testing,
and shall be constrained from a horizontal motion of more than 2 inches by suitable wooden frames. The
table shall move with a circular-synchronous motion in a vertical plane with a 1-inch diameter orbital
displacement wherein the table remains level and follows a circular path. The table shall operate at 284 ±
2 rpm for a total of 3 hours. Contact resistance, insulation resistance, dielectric withstanding voltage and
air pressure tests shall follow (4.7.3, 4.7.2, 4.7.1, 4.8.2). There shall be no degradation in performance
(see 3.7.1). Examples of Package Testing tables meeting these requirements are the Models SC1000 or
100V made by Lab Equipment, Inc. of Skaneateles, N.Y.
4.9.2 Vibration test.
4.9.2.1 U-183( )/U. Receptacle connector U-183 shall be mounted securely to a plate mounted on the
vibration table. Corresponding mating plug U-229 shall be mated to it. The unit shall be tested in
accordance with MIL-STD-202, method 201A (see 3.7.2).
4.9.2.2 U-228( )/U and U-229( )/U. Plug U-228( )/U or U-229( )/U shall be securely mounted by
metal straps to a plate mounted on the vibration table in such a manner that the mating plug U-229( )/U or
receptacle U-183( )/U, when mounted with it, is not supported by any means other than the coupling
device. The corresponding plug shall be mated with it and the coupling nut tightened finger tight (see
3.7.2). The unit shall be tested in accordance with MIL-STD-202, method 201A.
4.9.3 Drop. The connector shall be dropped six times at random from a height of six feet. The floor or
barrier receiving the impact shall be 2 inch fir backed by a concrete or a rigid steel frame. Contact
resistance, dielectric, and air pressure tests shall follow (4.7.3, 4.7.1, and 4.8.2). There shall be no
degradation in performance (see 3.7.3).
4.9.4 Temperature cycling. The connectors with mating connectors shall be subjected to temperature
cycling in accordance with method 107, test condition A of MIL-STD-202. Half of the connectors shall be
mated and half shall be unmated when placed into each temperature condition. It shall be possible to
mate and unmate the connectors at temperature extremes, and there shall be no loss of continuity (see
3.7.4).
4.9.5 Salt spray. The connectors shall be subjected to salt spray (corrosion) in accordance with
method 101D, test condition B of MIL-STD-202 (see 3.7.5).
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