MIL-DTL-27434B
3.2 Detail requirements for individual connector adapter types. Detail requirements or exceptions
applicable to individual types of connector adapters shall be as specified in the detail specifications listed
in Supplement 1 to this specification. In the event of any conflict between requirements of this
specification and the detail specifications, the latter shall govern (see 6.2).
3.3 Material. Unless otherwise specified (see 3.1), the material shall be as specified herein however,
when a definite material is not specified, a material shall be used which will enable the connector
adapters to meet the performance requirements of this specification. Acceptance or approval of any
constituent material shall not be construed as a guaranty of the acceptance of the finished product.
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.
3.3.1 Brass. Brass shall conform to ASTM B16, ASTM B36, ASTM B121 or ASTM B124.
3.3.2 Copper-beryllium. Copper beryllium shall conform to ASTM B194, ASTM B196 or
ASTM B197. Parts fabricated of copper beryllium shall be heat treated to Condition HT in accordance
with SAE-AMS-H-7199 after machining and forming.
3.3.3 Copper wire. Copper wire shall conform to A-A-59551.
3.3.4 Phosphor bronze. Phosphor bronze shall conform to composition A of ASTM B139.
3.3.5 Dielectric materials. Dielectric materials shall conform to the following:
3.3.5.1 Polytetrafluoroethylene. Polytetrafluoroethylene shall be in accordance with ASTM D1710.
3.3.5.2 Polyethylene. Polyethylene shall conform to type II, grade 4, class L of L-P-390.
3.3.5.3 Polystyrene. Polystyrene shall conform to type E-2 of L-P-516.
3.3.6 Silicone rubber. Silicone rubber shall conform to class II, grade 50 or 60, of A-A-59588, except
that oil-immersion test is not applicable.
3.3.7 Silver solder. Silver solder shall conform to class 1 of QQ-B-654.
3.3.7.1 Flux. Flux used while silver soldering shall conform to Specification O-F-499.
3.3.8 Soft solder. Soft solder shall conform to composition Sn60 of J-STD-006.
3.3.9 Synthetic rubber. Synthetic rubber shall conform to ASTM D2000.
3.3.10 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or
environmentally preferable materials should be used to the maximum extent possible provided that the
material meets or exceeds the operational and maintenance requirements, and promotes economically
advantages life cycle costs.
3.4 Design and construction. Connector adapters shall be of the design, construction, and envelope
dimensions specified (see 3.1.). Wherever feasible, parts having similar electrical characteristics may be
combined (fabricated as a single piece) to simplify construction. Parts of unlike materials may be
combined such as brass and copper beryllium, provided copper beryllium is used in the fabrication of the
single-piece construction.
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