MIL-DTL-25955A
3. REQUIREMENTS
3.1 Specification sheets. The individual item requirements shall be as specified herein and in
accordance with the applicable specification sheet. In the event of any conflict between the requirements
of this specification and the specification sheet, the latter shall govern.
3.2 Qualification. Connectors and accessories furnished under this specification shall be products that
are authorized by the qualifying activity for listing on the applicable qualified products list before contract
award (see 4.4 and 6.3).
3.3 Materials. Materials which are not specified (see 3.1), or which are not specifically described
herein shall be of the lightest practical weight and suitable for the purpose intended.
3.3.1 Contact materials. All electrical contacts shall be of suitable conductive materials.
3.3.2 Insert materials. Plastic insert materials shall conform to ASTM-D4066.
3.3.3 Shell and coupling ring materials. Shells and coupling rings shall be of high-grade aluminum
alloys. Die-castings shall conform to ASTM-B85.
3.3.4 Non-magnetic materials. All component parts shall be of a non-ferrous material or of a material
considered and classified as non-magnetic. Where screws and portions of cable adapter and clamp
assemblies must be of a magnetic material due to strength consideration, a magnetic material may be
employed.
3.3.5 Dissimilar metals. Unless suitably protected against electrolytic corrosion. Dissimilar metals shall
not be employed in intimate contact with each other in a connector or in any mated pairs of connectors
conforming to this specification. Dissimilar metals are defined in MIL-STD-889.
3.3.6 Grommet materials. Wire and terminal sealing grommet materials shall be molded of a resilient
dielectric or elastomer conforming to ASTM-D2000 class SC415 A, B, E, G, or Z.
3.3.7 Materials, hermetic. The following exceptions and additions for class H connectors apply to the
materials requirements specified herein.
3.3.7.1 Magnetic materials, hermetic. All metallic component parts of class H receptacles may be of a
material considered as magnetic.
3.3.7.2 Insert materials, hermetic. Dielectric material employed to seal and insulate contacts in class H
receptacles shall be vitreous material.
3.3.8 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
advantageous life cycle costs.
3.4 Design and construction. Connector assemblies shall be designed and constructed to withstand
the handling expected in normal service use and installation and to comply with the requirements
specified herein. No special tools shall be necessary for assembly, disassembly, or maintenance except
as specified herein.
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