MIL-DTL-55661C
3.3 Cast and molded parts.
3.3.1 Casting. Castings shall be of uniform quality and condition, and free from cracks, harmful
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 scales. All
castings shall be completely cleaned prior to presentation for inspection. Castings shall not be plugged or
welded, nor shall imperfections be filled in.
3.3.2 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.
3.4 Soldering. Soldering used for electrical connections shall conform to requirement 5 of MIL-HDBK-
454.
3.5 Cleaning.
3.5.1 Parts. After fabrication, parts shall be cleaned in accordance with good commercial practice.
Cleaning processes shall have no deleterious effect. Corrosive material shall be removed completely
before the parts are assembled.
3.5.2 Units. After assembly, units shall be cleaned thoroughly and shall be free from particles of solder,
flux, and other foreign material. In addition, when necessary, such cleaning shall also be performed
before final assembly of the units.
3.6 Finish. Connectors shall be given protective finish in accordance with MIL-F-14072 and connector
drawings (see 4.4).
3.7 Marking. Connector and associated fittings shall be permanently and legibly marked in accordance
with the general requirements of MIL-STD-130 and the connector drawings with the Military PIN (see
paragraph 1.2), manufacturer's CAGE code and final assembly date code. The marking location is
optional. When practicable, a location should be picked that will least likely be covered in cable assembly
or installation. This will be required marking on all connectors 12 months from the date of this
specification. Existing stock marked in the previous manner with the UG number is acceptable for
Government use until stock is purged.
3.8 Interchangeability. Like units and assemblies shall be physically and functionally interchangeable,
without modification of such items. Individual items shall not be handpicked for fit or performance. Where
a listed dimension is not within design limits, it shall be considered a major defect (see 4.8).
3.9 Electrical requirements.
3.9.1 Continuity. Continuity shall exist between each mated pair of contacts (see 4.6.1).
3.9.2 Dielectric withstanding voltage.
3.9.2.1 Coaxial contacts. Each coaxial contact shall withstand a potential of 2,500 volts dc between the
center contact and the outer contact for 1 minute when tested in accordance with 4.6.2.
3.9.2.2 Outer contacts. The outer contacts of the coaxial elements shall withstand a potential of 1,500
volts dc for 1 minute when tested in accordance with 4.6.2.
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