MIL-PRF-49142B
3.3.1.3 Connector bodies. All brass bodied connectors in accordance with ASTM B16, ASTM B36 or
ASTM B121 shall be silver plated in accordance with ASTM B700 to a minimum thickness of 0.000200
inch (0.005 mm) over a copper underplate or nickel plated to a minimum thickness of .000200 inch (0.005
mm) as defined in the PIN on the individual specification sheet. All corrosion resistant steel bodied
connectors In accordance with ASTM A484 or ASTM A582 shall be passivated in accordance SAE-AMS-
QQ-P-35, unless otherwise specified (see 3.1). The requirements of MIL-STD-889 must be met in 3.3.1.
3.3.2 Dissimilar metals. Dissimilar metals between which an electromotive couple may exist shall not
be placed in contact with each other. Reference is made to MIL-STD-889 for definition of dissimilar
metals.
3.3.3 Nonmagnetic materials. All parts (except hermetic sealed connectors) shall be made from
materials which are classed as nonmagnetic (see 3.8).
3.3.4 Spring members. Unless otherwise specified (see 3.1), center contact spring members shall
be made of copper beryllium in accordance with ASTM B194, ASTM B196, and ASTM B197.
3.4 Configuration and features. Connectors shall be of the configuration and physical dimensions
specified (see 3.1).
3.4.1 Engineering parameters. The parameters of nominal impedance, voltage rating, frequency
range and temperature range shall be as specified (see 3.1).
3.4.2 Mating (visual indication). When applicable (see 3.1), a visual means shall be provided to
indicate when two mating connectors are properly mated.
3.4.3 Screw threads. Screw threads shall be in accordance with FED-STD-H28 unless otherwise
specified (see 3.1).
3.4.4 Connector interfaces. Connector interfaces shall be in accordance with MIL-STD-348 unless
otherwise specified (see 3.1).
3.5 Force to engage/disengage (see 4.6.2).
3.5.1 Bayonet and threaded types. When tested as specified in 4.6.2.1, the torque necessary to
completely couple or uncouple the connectors shall not exceed that specified (see 3.1). Also the
longitudinal force necessary to initiate the engaging or disengaging cycle shall not exceed that specified
(see 3.1).
3.5.2 "Push on" connector types. When tested as specified in 4.6.2.2, the forces necessary to fully
engage or disengage the connectors shall not exceed that specified (see 3.1).
3.6 Coupling proof torque (threaded types only). When connectors are tested as specified in 4.6.3,
the coupling mechanism shall not be dislodged and the connector shall meet the requirements of 3.5.1.
The interface dimensions of the connectors shall remain as specified (see 3.4.4).
3.7 Mating characteristics. When connectors are tested as specified in 4.6.4, the mating dimensions
shall be gaged as specified (see 3.1) and the dimensions shall remain within the specified tolerances (see
3.1).
3.8 Permeability of nonmagnetic materials. When connectors (except hermetic sealed) are tested as
specified in 4.6.5, the permeability (mµ) shall be less than 2.0.
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