MIL-DTL-83503C
6.3 Qualification. With respect to products requiring qualification, awards will be made only for products
that, at the time of award, are qualified for inclusion in QPL No.83503 whether or not such products have
actually been listed by that date. The attention of contractors is called to this requirement. In order to be
eligible for contracts or orders for products covered by this specification, manufacturers should arrange for
qualification testing of products they propose to offer the Federal Government. The activity responsible for
the QPL is DSCC-VQ, which may be contacted at the Defense Supply Center Columbus, P.O. Box 3990,
ATTN: DSCC-VQ, Columbus, Ohio 43218-3990 or emailed to mailto:RectangularConnector@dla.mil.
Application procedures should conform to the "Provisions Governing Qualification" (see 6.3.1).
6.3.1 Provisions governing qualification. Copies of "Provisions Governing Qualification" may be
obtained upon application to Standardization Document Order Desk, Building 4D, 700 Robbins Avenue,
Philadelphia, PA 19111-5094.
6.4 Tin whisker growth. The use of pure tin may exhibit tin whisker growth problems (days to months to
years) after manufacture. Tin whiskers can develop under typical operating conditions on any product that
uses lead-free pure tin coatings. Conformal coatings applied over top of a whisker-prone surface will not
prevent the formation of tin whiskers. Alloys of 3 percent lead have shown to inhibit the growth of tin
whiskers.
6.5 Environmentally preferable material. Environmentally preferable materials should be used to the
maximum extent possible that the material meets or exceeds the operational and maintenance
requirements, and promotes economically advantageous life cycle costs. Table XIII lists the
Environmental Protection Agency (EPA) top seventeen hazardous materials targeted for major usage
reduction. If any of these hazardous materials are required, it is recommended that it be used only when
other materials cannot meet performance requirements.
TABLE XIII. EPA top seventeen hazardous materials.
Benzene
Dichloromethane
Tetrachloroethylene
Cadmium and compounds
Lead and compounds
Toluene
Carbon Tetrachloride
Mercury and compounds
1,1,1 - Trichloroethane
Chloroform
Methyl Ethyl compounds
Trichloroethylene
Chromium and compounds
Methyl Isobutyl Ketone
Xylenes
Cyanide and compounds
Nickel and compounds
6.6 Subject term (key word) listing.
Beryllium
Contacts
Copper
Gold
Lead
Nickel
Polarization
Tin
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