MIL-DTL-25516F
3.5 Design and construction.
3.5.1 General design. The connectors shall be design for use with small radio frequency (RF) coaxial
cables or shielded or unshielded wire as shown on the specification sheet (see 3.1). Solder pot of contact
shall accommodate conductor sizes AWG 18, and smaller. Outer contact spring members shall be
attached to the body for uninterrupted shielding and continuity under vibration conditions. Clamping of the
cable shield to the connector body shall be independent of the type of rubber utilized, but shall provide
metal-to-metal pressure and continuity. Polarization positions, as shown on figure 1, with mating lugs on
the receptacles and matching slots on the plug couplings, shall be provided on the connectors. The
retaining nut of the cable clamp shall include a suitable chamfer in the cable entry hole to prevent damage
to the cable when exposed to shock and vibration.
3.5.2 Mating dimensions. The connectors shall be designed with mating dimensions in accordance with
MIL-STD-348. The plug shall be so designed as to give a .005 (0.13 mm) inch minimum compression to
the interface gasket when mated.
3.5.3 Moisture sealing. Moisture sealing shall be accomplished over the cable jacket in the cable entry
area of the connector and over the cable primary insulation (core). Sealing shall also be effected in the
area where the plug body fits the receptacle.
3.5.4 Contacts. All center contacts shall be of the "captive contact" design to insure electrical continuity
without depending upon cable stability.
3.5.4.1 Socket contacts. The entering end of the socket contacts shall be rounded or chamfered to
facilitate entrance of the mating contact.
3.5.5 Screw threads. Unless otherwise specified, screw threads shall be in accordance with
FED-STD-H28.
3.5.6 Maintenance. The connector shall have a minimum number of parts consistent with reliability.
Where practicable, the design shall permit easy assembly, disassembly, location of trouble sources, and
maintenance with tools and equipment normally available commercially by service maintenance personnel
with a minimum of training. Plugs and receptacles (series II) shall be assembled to cables by military
standard hand operated crimp tools.
3.5.7 Interchangeability. All connectors of the same PIN shall be functionally and dimensionally
interchangeable.
3.6 Performance.
3.6.1 Insulation resistance for mated connectors. When measured in accordance with 4.7.2, the
insulation resistance of mated connectors shall conform to the minimum values in table II.
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