MIL-DTL-14072F
b. Sealed members. The requirements specified above do not apply to
intermetallic contact members which, in a clean and dry condition, are permanently
sealed in noncorrosive embedding or encapsulating materials, or hermetically sealed
containers that are protected from ambient atmospheric conditions.
c. Magnesium. Table VI does not permit intermetallic contact between
magnesium and any other metal. If the use of magnesium in contact with a dissimilar
metal is required, the metals shall be separated by a tape in accordance with A-A-59298.
The tape shall extend at least 0.32 cm beyond the periphery of the joint. The use of cloth
supported tapes is prohibited.
d. Fasteners for magnesium. Although not permitted by Table VI, the use of
aluminum alloy 5056-H32 rivets and aluminum alloys 5052, 5056, 6053 and 6063
washers and shims are allowed for assembly of magnesium alloy members. Bolts and
nuts shall be restricted to anodized 6061 aluminum alloy coated with one of the following
sealers: SAE-AMS-S-8802, MIL-PRF-81733, SAE-AMS 3276, or epoxy primer MIL-
PRF-23377.
3.14 Finish selection. Unless otherwise instructed by the contracting officer,
finishes applied to equipment shall be one of those specified by Tables I, III, or IV.
Insofar as possible, selection of finishes for all applications shall be made in accordance
with Table VII. All restrictive conditions applicable to finish selection not appearing in
Table VII must be considered prior to making a choice of finish. In this connection, it
may be noted that Tables I through V contain finish selection requirements applicable to
particular finishes. Paragraphs 3.14.1, 3.14.2 and 3.14.3 regarding finishes covered by
this document, apply to finish selection and shall be used in conjunction with Table VII.
3.14.1 Finishing of Type I surfaces. The following requirements apply to finishing
Type I surfaces:
a. Surfaces exposed to view. All Type I surfaces exposed to view when
equipment is in transit or operational shall be painted for protection and or the purpose of
camouflage. Parts fabricated from metals or alloys in Groups 6 through 18 of Table VI
and copper shall be painted for protection. Those fabricated from materials listed in
Groups 1 through 5 and hot-dip zinc coated parts shall be painted for camouflage
purposes. The only exceptions to these painting requirements are as follows:
(1) Small copper-base alloy parts (except screws, bolts, nuts and washers)
hooks, eyelets, bead-chain, etc. finished by using chemical blackening finish E311.
(2) Small parts finished with Type I, dull nickel plating, or hot-dip-zinc.
(3) Assemblies requiring a sliding electrical contact surface(s) finished
with dull nickel plating.
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