MIL-DTL-83513G
3.3.11 Pure tin. The use of pure tin is prohibited. Tin content used in connector materials shall not
exceed 97 percent, and an alloy material shall be chosen to inhibit the growth of tin whiskers (see 6.4 ).
3.4 Design, construction, and physical dimensions. Connectors shall be of the design, construction
and physical dimensions specified (see 3.1). Connectors shall be so designed that neither the pins nor
the sockets will be damaged during normal mating of counterpart connectors.
3.4.1 Contact design. Contacts shall be the reverse gender type. The live pin shall be installed in a
protective insulator with the static socket protruding from a suitably shrouded insulator.
3.4.1.1 Solder contacts. Solder contacts shall be nonremovable from the insert and shall have solder
cup terminals as specified (see 3.1). Solder cups shall be so designed that during soldering no
components shall be damaged and no liquid solder shall escape.
3.4.1.2 Crimp contacts. Crimp contacts shall be nonremovable from the insert.
3.4.1.3 Contact identification. Contact position number one shall have an identifiable mark placed on
the surface or side of the number one contact position.
3.4.2 Insert design and construction. Inserts shall be designed with suitable sections and radii such
that they will not readily chip, crack, or break in assembly or in normal service. Inserts shall be molded in
or bonded into the metal shell (class M) or as specified (see 3.1). Pin inserts shall provide adequate
protection against a socket contacting a pin before the mating pair of connectors has been polarized.
The insert shall be so designed that the insert cannot be removed from the shells (class M) in accordance
with the retention requirement of 3.5.17. The contact retention system shall provide positive retention.
3.4.2.1 Insert arrangement. The contact arrangement shall be as specified by the connector Part or
Identifying Number (PIN) (see 3.1).
3.4.2.2 Contact alignment and stability. With all contacts in place, the alignment of pin/socket contacts
shall always permit engagement irrespective of buildup of allowable tolerances on hole locations,
distortion of contacts due to crimping, and insulator location in the shell.
3.4.3 Shell design (class M). The shell shall be designed to positively retain the insulator and shall be
constructed so that the insulator cannot be removed (see
3.4.2).
3.4.3.1 Shell polarization. Polarization shall be accomplished by a keystone shape shell design with
polarization accomplished before engagement of the pins and sockets.
3.4.3.2 Mounting hardware (see MI-DTL-83513/5 for mounting hardware options). Hardware shall
conform to ASTM A693, SAE AMS2700, type 2, and FED-STD-H28 (see 3.1). Mounting hardware is to
be ordered independently of connectors and shall be supplied loose pack unless otherwise specified.
3.4.4 Interchangeability. All connectors and accessories having the same military PIN shall be
completely interchangeable with each other with respect to installation (physical), performance (function)
and intermateability, as specified herein. Solder and crimp contact connectors shall be intermatable (see
3.1).
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