MIL-DTL-25867D
3.2 Materials.
3.2.1 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.
3.2.2 Nonmagnetic materials. Nonmagnetic materials shall be used for all parts of the
gage except where magnetic materials are essential.
3.2.3 Nonferrous materials. Nonferrous materials shall be used for all parts of the gage
except where ferrous materials are essential.
3.2.4 Metals. Metals shall be corrosion-resistant or treated to resist corrosion due to
fuels, salt spray, or atmospheric conditions likely to be met in storage or normal service.
3.2.4.1 Dissimilar metals. Unless protected against electrolytic corrosion, dissimilar
metals shall not be used in intimate contact with each other. Dissimilar metals are defined in
MIL-STD-889.
3.2.5 Toxic and corrosive fumes. The gage shall be of such material and construction
that when the material is burned, fumes or gases that combine with the atmosphere to form acid
or corrosive alkali will not be released.
3.2.6 Protective treatment. When materials are used in the construction of the gage that
are subject to deterioration when exposed to climatic and environmental conditions likely to
occur during service usage, they shall be protected against such deterioration in a manner that
will in no way prevent compliance with the requirements of this specification. The use of any
protective coating that will crack, chip, or scale with age or extremes of climatic and
environmental conditions shall be avoided.
3.2.7 Fungus-proof materials. Materials that are nutrients for fungi shall not be used
where it is practical to avoid them. Where used and not hermetically sealed, they shall be treated
with a fungicidal agent acceptable to the procuring activity. However, if they will be used in a
hermetically sealed enclosure, fungicidal treatment will not be necessary.
3.3 Design and construction. The gage shall be designed to indicate directly the pressure
in aircraft hydraulic system accumulators and pneumatic systems. The gage shall be constructed
so that no parts will work loose in service and shall be built to withstand the strains, jars,
vibrations, and other conditions incident to shipping, storage, installation, and service.
3.3.1 Interface. Pivots, bearings, and gears shall neither bind nor shake and shall be as
frictionless as practicable.
4
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business