MIL-DTL-24251F
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order
(see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel
need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are
maintained by the Inventory Control Point's packaging activities within the Military Service or Defense Agency, or
within the military service's system commands. Packaging data retrieval is available from the managing Military
Department's or Defense Agency's automated packaging files, CD-ROM products, or by contacting the responsible
packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. Heat dissipating electron tube shields are used primarily for lowering the envelope operating
temperature, but in addition, may be used to provide electrostatic shielding and retention under shock and vibration.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a.
Title, number, and date of the specification.
b.
Title, number, and date of the applicable specification sheet.
c.
Complete military PIN.
d. ASSIST Online database at https://assist.dla.mil/ should be cited in the solicitation, and if required, the
specific issue of individual documents referenced (see 2.1).
Packaging requirements (see 5.1).
e.
6.3 Tin whisker growth. The use of alloys with tin content greater than 97 percent, by mass, may exhibit tin whisker
growth problems after manufacture. Tin whiskers may occur anytime from a day to years after manufacture and can
develop under typical operating conditions, on products that use such materials. Conformal coatings applied over top
of a whisker-prone surface will not prevent the formation of tin whiskers. Alloys of 3 percent lead, by mass, have
shown to inhibit the growth of tin whiskers. For additional information on this matter, refer to ASTM-B545 (Standard
Specification for Electrodeposited Coatings of Tin).
6.4. Environmentally preferable material. Environmentally preferable materials should be used to the maximum
extent possible to meet the requirements of this specification. As of the dating of this document, the U.S.
Environmental Protection Agency (EPA) is focusing efforts on reducing 31 priority chemicals. The list of chemicals
and additional information is available on their website at https://www.epa.gov/osw/hazard/wastemin/priority.htm.
Included in the list of 31 priority chemicals are cadmium, lead, and mercury. Use of the materials on the list should
be minimized or eliminated unless needed to meet the requirements specified herein (see section 3).
6.5 Subject term (key word) listing.
Bias
Fatigue
Glass envelope
Grid
Permeability
Plate
Salt atmosphere
Shock
Thermocouple
Vibration
Watts
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