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| MIL-T-182323(AS)
3.1.20.2
CRITICAL AND STRATEGIC! MATERIALS. - Materials shall be chosen
on the basis of suitability and availability in this country
in quantity and from consideration of the additional restrictions created during
a national emergency. Critical and strategic materials shall be used only to the
extent considered mandatory for satisfactory operation, the contemplated use of
these materials shall be brought to the attention of NAVAIR with appropriate
justification therefor and shall be subject to NAVAIR approval.
3.1.20.3
SUBSTITUTE MATERIALS. - The design of target shall be based
on applicable material specifications approved by NAVAIR.
Contractors may use substitute materials provided strength, interchangeability
and serviceability of the parts are not impaired and provided the substitutions
result in a demonstrated advantage to NAVAIR and are approved by the LGR. Adjust-
ments for substitutions involving change in weight shall be justified and shall
be handled in the manner prescribed in the contract for variation in weights of
government-furnished equipment.
3.1.20.4
MAGNESIUM ALLOYS. - Magnesium alloys shall only be used with
specific approval of NAVAIR in each case. When used the
protective finish shall be in accordance with the applicable paragraph of
Specification MIL-F-7179.
3.1.20.5
LEATHER. - Leather shall not be used.
3.1.20.6
ADHESIVES. - The use of adhesives in the fabrication of
structural parts, including sandwich structures, shall be
subject to the specific approval of NAVAIR as specified in 3.1.20.10.
3.1.20.7
REINFORCED PLASTICS. - The use of reinforced plastics in
structural parts shall be subject to the specific approval of
NAVAIR as specified in 3.1.20.30.
3.1.20.8
FOAMED PLASTIC. - The use of foamed-in-place core construction
in structural parts shall be subject to the specific approval
of NAVAIR as specified in 3.1.20.10.
3.1.20.9
ELASTOMERIC MATERIALS. - Elastomeric components shall be
fabricated from materials having maximum practicable ozone
and aging resistance consistent with performance requirements and applicable
specifications.
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