MIL-PRF-22/12D
TABLE IV. Length of operating shaft.
Standard length of shaft measured from
mounting surface of resistor
0.375 inch diameter shaft
in inches (±0.0468)
Symbol
2 hole mounting
D
0.875
H
1.500
J
2.000
K
2.500 1/
N
4.000
R
6.000
1/
This shaft shall be flatted to within
0.156 inch of the mounting surface.
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 activity within the Military Service or Defense Agency, or within
the military services 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 general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Notes. The notes specified in MIL-PRF-22 will be applicable to this specification.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a.
Title, number, and date of this specification, and the complete PIN (see 1.2).
b.
If not otherwise specified (see 2.1), the versions of the individual documents referenced will be those in
effect on the date of release of the solicitation.
Packaging requirements (see 5.1).
c.
6.3 PIN. This specification requires a PIN that describes technology and appropriate references to associated
6.4 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).
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