MIL-DTL-55074G
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 First article. When specified (see 6.3), a sample shall be subjected to first article inspection in
accordance with 4.5.
3.3 Material. The material for each part shall be as specified herein. However, when a definite material is
not specified, a material shall be used which will enable the connectors, accessories and contact
assembly to meet the performance requirement. Acceptance or approval of any constituent material shall
not be construed as a guaranty of the acceptance of the finished product.
3.3.1 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.
3.3.2 Nonmagnetic materials. Nonmagnetic parts are not applicable.
3.3.3 Plastic, molded thermosetting. Unless otherwise specified (see 3.1), the body material shall be
glass-filled diallyl phthalate in accordance with type SDGF of ASTM D5948.
3.3.4 Metals.
3.3.4.1 Copper alloys. Hermaphroditic contacts and contact terminations shall be beryllium copper as
specified in ASTM B196/B196M.
3.3.4.2 Aluminum. Where applicable, aluminum shall be as specified in ASTM B209/B209M (Alloy 7075)
or ASTM B85/B85M, painted or anodized to meet the requirements of MIL-DTL-14072 (see 3.1).
3.3.4.3 Corrosion resisting steel. Where applicable, corrosion resisting steel shall be 300 series, low
magnetic permeability in accordance with SAE AMS-QQ-S-763 and passivated per SAE AMS 2700 or to
finish E300 as specified in MIL-DTL-14072 (see 3.1).
3.3.4.4 Contact plating. Contacts shall be gold plated in accordance with MIL-DTL-45204 type II, class 2,
grade D. Silver underplating shall not be used.
3.3.5 Restricted materials.
3.3.5.1 Flammable. explosive. or toxic. Material shall be nonflammable, nonexplosive, and nontoxic over
the operating temperature range.
3.3.5.2 Corrosive resistance. Connectors, accessories, and contact assemblies shall be of corrosion-
resistant materials or treated to prevent corrosion.
3.3.5.3 Ferrous. Material containing more than 5 percent iron shall not be used for current carrying parts.
3.3.6 Dissimilar metals. Where dissimilar metals are used in intimate contact with each other, protection
against electrolysis and corrosion shall be provided. Dissimilar metals shall be as defined in MIL-STD-
889. Dissimilar metals such as brass, copper, or steel (except corrosion-resisting steel, passivated in
accordance with 3.3.3.3) shall not be used in intimate contact with aluminum or aluminum alloy.
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