MIL-DTL-3661D
(d) Different metals in contact, even though similar, should be employed in assemblies in such a
manner that the smaller part is cathodic or protected and the larger part is anodic or corroded,
if any corrosion takes place.
TABLE VII. Grouping of metals.
Group I
Group II
Group III
Group IV
Magnesium
Anodized aluminum
Zinc
Copper and its alloys
alloys
Aluminum
Cadmium
Nickel and its alloys
Aluminum alloys
Steel
Chromium
(most
Zinc
Lead
Stainless steel
anodic)
Cadmium
Tin
Gold
Tin
Stainless steel
Silver (most cathodic)
Stainless steel
6.5 Definitions. For the purpose of this specification, the following definitions apply:
6.5.1 Lampholder. A lampholder is an electrical device which accommodates a lamp both electrically and
mechanically, but does not provide for the use of an indicator-light lens.
6.5.2 Indicator light. An indicator light is an indicator-light housing and indicator-light lens assembled as
a unit.
6.5.3 Indicator-light housing. An indicator-light housing is an electrical device which accommodates a
lamp both electrically and mechanically, and provides for the use of an indicator-light lens.
6.5.4 Indicator-light lens. An indicator-light lens is a device having a mounting means and a glass or
plastic window through which light is transmitted.
6.6 Usable lamps. The usable lamps (see 3.2) may be purchased under MIL-DTL-6363 (Lamp,
Incandescent, Aircraft Service, General Specification for) or MIL-DTL-15098 (Lamps, Glow, General Specification
for), as applicable.
6.7 Subject term (keyword) listing.
Lamp
Plug-in
Press-to-test
6.8 Changes from previous issue. The margins of this specification are marked with vertical lines to
indicate where changes from the previous issue were made. This was done as a convenience only and the
Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are
cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal
notations and relationship to the previous issue.
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