MIL-DTL-83538D
3.3.3 Metals. Metals shall be of a corrosion-resistant type or shall be plated or treated to resist
corrosion.
3.3.3.1 Dissimilar metals and compatible couples. When dissimilar metals are used in intimate contact
with each other, protection against galvanic corrosion shall be provided. The use of dissimilar metals in
contact, which tend toward active galvanic corrosion (particularly brass, copper, or steel used in contact
with aluminum or aluminum alloy) is not acceptable. However, metal plating of dissimilar base metals to
provide similar or suitable abutting surfaces is permitted.
The use of dissimilar metals separated by a suitable insulating material is also permitted. Dissimilar
metals and compatible couples shall be in accordance with MIL-STD-889.
3.3.4 Components. Materials for specific components of the connector shall be as follows:
a.
Shell: Corrosion-resistant steel.
b.
Coupling ring: Corrosion-resistant steel.
c.
Insert: Reinforced epoxy resin or other suitable rigid dielectric.
d.
Spring fingers: Heat-treated beryllium copper or corrosion-resistant steel.
e.
Filler compound: RTV silicone in accordance with MIL-A-46146, or equivalent.
f.
Gasket, grommet, and interfacial seal: fluorosilicone.
g.
Buffer dust cap: Non-metallic.
3.3.5 Fungus resistance. Materials used in the construction of these connectors shall be fungus inert
(see 4.3.2).
3.3.6 Magnetic permeability. The relative permeability of the wired, assembled, and fully mated
connector assembly shall be less than 2.0µ when measured in accordance with 4.6.34.
3.3.7 Biological and chemical requirements.
3.3.7.1 Minimum requirements. The minimum requirement for the connectors and accessories
is to be capable of safe recovery after contamination and to provide the capability to utilize the
associated store to its full capacity for a short period (i.e. 4 weeks), involving repeated contamination and
without decontamination measures applied. The connectors and accessories shall therefore be
inherently resistant to, or protected against, damage from the agents of attack and decontaminants which
could affect its operational effectiveness. The connector and accessories shall be designed for ease of
operation/use by operators in a BC environment.
3.3.7.2 Defense factors. The AEP-7, "Nuclear, Biological and Chemical (NBC) Defense factors in the
Design, Testing and Acceptance of Military Equipment" document shall apply as requirement for the
connectors and accessories design, with the exception of the nuclear Hardening Requirement which shall
not be taken into consideration.
3.3.7.3 Hardening. Hardening is required against the following agents:
a.
Mustard Agent (H)
b.
Mustard Lewisite (HL)
c.
Thickened Mustard Lewisite (THL)
d.
Nerve Agent (GB) and also in thickened form
e.
Nerve Agent (GD) and also in thickened form
f.
Nerve Agent (VX) and also in thickened form
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