MIL-PRF-83531C
3.17 Fungus. The manufacturer shall certify that all external materials are nonnutrient to fungus
growth or are suitably treated to retard fungus growth, or shall perform the test specified in 4.6.15. When
delay lines are tested as specified in 4.6.15, there shall be no evidence of fungus growth on the external
surface.
3.18 Dielectric withstanding voltage at reduced barometric pressure. When delay lines are tested as
specified in 4.6.16, there shall be no arcing, flashover, breakdown of insulation, or other evidence of
damage.
3.19 Resistance to soldering heat. When delay lines are tested as specified in 4.6.17, there shall be
no softening of the insulation or loosening of the windings or terminals, no evidence of internal solder
reflow or heat damage, and no evidence of discontinuity.
3.20 Flammability. When delay lines are tested as specified in 4.6.18, there shall be no evidence of
violent burning which results in an explosive-type fire, and the coating material used shall be self-
extinguishing. Delay lines shall not be considered to have failed if they are consumed by the applied
flame. Delay lines shall be considered to have failed only if an explosion or dripping of flaming material
occurs, an explosive-type flame is produced, or if visible burning continues beyond the allowable duration
of 3 minutes after removal of the applied flame.
3.21 Winding continuity. When delay lines are tested as specified in 4.6.19, all windings shall be
electrically continuous.
3.22 Marking.
3.22.1 JAN and J marking. The United States Government has adopted, and is exercising legitimate
control over the certification marks "JAN and "J", respectively, to indicate that items so marked or
identified are manufactured to, and meet all the requirements of specifications. Accordingly, items
acquired to and meeting all the criteria specified herein and in applicable specifications, shall bear the
certification mark "JAN" except that items too small to bear the certification mark "JAN" shall bear the
letter "J". The "JAN" or "J" shall be placed immediately before the part number except that if such
location would place a hardship on the manufacturer in connection with such marking, the "JAN" or "J"
may be located on the first line above or below the part number. Items furnished under contracts or
orders which either permit or require deviation from the conditions or requirements specified herein and in
applicable specifications shall not bear "JAN" or "J". In the event an item fails to meet the requirements
of this specification and the applicable specification sheets or associated specifications, the manufacturer
shall remove completely the military part number and the "JAN" or the "J" from the sample tested and
also from all items represented by the sample. The "JAN" or "J" certification mark shall not be used on
products acquired to contractor drawings or specifications. The United States Government has obtained
Certificate of Registration No. 504,860 for the certification mark "JAN" and Registration Number
1,586,261 for the certification mark "J".
3.22.2 Full marking. Each delay line shall be marked on the top in accordance with method I of
MIL-STD-1285 with the following information:
a. "JAN" or "J" marking (see 3.22.1).
b. Military PIN (see 1.2.1).
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