MIL-DTL-55074G
3.3.7 Cast and molded parts.
3.3.7.1 Casting. Castings shall be of uniform quality and condition, and free from harmful cracks,
shrinkage, porosity, gas holes, foreign matter, and other injurious defects. The surface of the castings
shall be free from pits, parting lines, porous areas, fins, ridges, modules, raised metal, and scale. All
castings shall be completely cleaned prior to presentation for inspection. Castings shall not be plugged or
welded, nor shall imperfections be filled in.
3.3.7.2 Molded parts. Molded parts shall be uniform in quality, condition, and color. The molded parts
shall be clean, smooth, free from porous areas, foreign materials, weak sections, bubbles, flash and any
other injurious defects.
3.3.7.3 Rubber and elastomeric material. Rubber and elastomeric material shall be in accordance with
A-A-59588 as specified (see 3.1).
3.4 Design and construction. Connectors, accessories, and contact assembly shall be of the design,
construction, and physical dimensions specified (see 3.1).
3.4.1 Threaded parts. Unless otherwise specified (see 3.1), all threaded parts shall be in accordance with
FED-STD-H28.
3.4.1.1 Engagement of threaded parts. All threaded parts shall engage by at least two full threads.
3.4.2 Connector assembly. No parts of the connector assembly shall be permanently displaced from their
original, normal, fitted position (see 3.1) at completion of the specified tests.
3.4.3 Contact compliance. The contact shall be designed to assure proper operation without dependence
on mechanical float, and to assure that minimum force is transmitted to the connection joining the contact
to the interconnecting media during mating and unmating.
3.4.3.1 Cleaning. After assembly, the connectors shall be cleaned thoroughly and shall be free from
particles of solder, flux, and other foreign material.
3.4.4 Finish, protective. Equipment shall be given protective finish in accordance with MI-DTL-14072 and-
as specified (see 3.1).
3.5 Continuity (contact assembly). When tested as specified in 4.7.3, the resistance value shall not
exceed 1.0 ohm.
3.6 Dielectric strength (contact assembly). When tested as specified in 4.7.4, the contact assembly shall
be rejected if the automatic tester fails to proceed after a period of 1 minute.
3.7 Insulation resistance (contact assembly). When tested.as specified in 4.7.5, the initial insulation
resistance shall be not less than 1,000 mega ohms. During the moisture resistance test (see 4.7.19) and
the high humidity and high temperature test (see 4.7.18), the insulation resistance shall be not less than
10 mega ohms.
3.8 Contact resistance (contact assembly). When tested as specified in 4.7.6, the voltage drop shall be
not greater than 7 millivolts between the contacts of each circuit of the mated contact assemblies. The
calculated resistance of the two jumper wires of each circuit shall be deducted from the measured
resistance.
3.9 Air leakage (contact assembly and connector). When tested as specified in 4.7.7, there shall be no
.evidence of any leakage at the cable entry, minor gasket, screw holes or through the castings and
contact assembly. To check the major gasket, the contact assembly shall be removed.
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