MIL-DTL-75K
3.4.2 Special marking.
3.4.2.1 Infrared tubes. Infrared tubes susceptible to damage by prolonged exposure to light shall
include the following marking on the unit container: "DO NOT REMOVE FROM CONTAINER EXCEPT
FOR USE OR TEST. AVOID PROLONGED EXPOSURE TO LIGHT."
3.4.2.2 Country of origin. When the country of origin does not appear on the tube due to inadequate
allowable marking area, the phrase "MADE IN USA" or the abbreviation "U.S.A." shall be marked on each
unit container. For electron tubes manufactured in other countries, the phrase shall be changed
accordingly.
3.4.2.3 Miscellaneous special markings. Containers for which the upper corner drop tests are not
required shall be marked with arrows as specified in MIL-STD-129 (see 4.8.2.1). When applicable, water
vapor-proof protection with desiccant method of preservation, radioactive and magnetized material
markings shall be applied in accordance with MIL-STD-129.
3.5 First article and conformance inspections. First article and conformance inspections and tests shall
be required as specified in 4.5 and 4.6, respectively. Samples for these tests shall be furnished in
accordance with procedures outlined in 4.5 and 4.6. Performance of visual and dimensional inspections,
rough handling tests, and leakage tests shall conform to inspections and tests outlined in 4.7.1, 4.7.2.1,
and 4.7.2.2, respectively. The inspection required for industrial packaging shall be as specified (see 6.2).
3.5.1 Functional requirements.
3.5.1.1 Rough handling test. When packs have been tested in accordance with 4.7.2.1, all materials
and components comprising each pack shall be free from damage or evidence of misplacement which
might affect the utility of the preservation method or pack. The electron tubes within the tested packs
shall show no visible signs of damage. When specified (see 6.2), functional tests in accordance with the
sampling and inspection criteria of MIL-PRF-1, table I (sampling and acceptance criteria for qualification)
shall be conducted on those electron tubes subjected to the rough handling test to determine freedom
from operational malfunction.
3.5.1.2 Leakage test (when applicable). When a barrier enclosed unit pack has been tested in
accordance with 4.7.2.2, there shall be no evidence of moisture within the unit pack.
3.6 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environ-
mentally 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.
3.7 Workmanship. The quality of workmanship shall assure acceptance of the completed preservation,
packing, and marking requirements in accordance with the inspections specified in section 4.
4. VERIFICATION
4.1 Test equipment and inspection facilities. Test and measuring equipment and inspection facilities of
sufficient accuracy, quality, and quantity to permit performance of the required inspection shall be
established and maintained by the contractor. The establishment and maintenance of a calibration
system to control the accuracy of the measuring and test equipment shall be in accordance with NCSL-
Z540.1 and ISO-10012-1.
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