MIL-PRF-39035E
3.33.2 Minimum marking. When the physical size of the resistor style precludes the marking of the information
required by 3.33.1, the minimum marking shall be as specified in the specification sheet (see 3.1). Marking shall
remain legible at the end of all tests. In those cases where full marking requirements are not on the resistor body, the
full marking shall be marked on the unit package.
3.33.3 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 of 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 or 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 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 or Registration Number 504,860 for the certification mark "JAN",
and Registration Number 1,586,261 for the certification mark "J".
3.33.4 Supplying to higher FR levels. A manufacturer may supply to all higher failure rate levels than that to which
he is qualified. Parts qualified and marked to lower failure rate levels, with procuring agency approval, are
substitutable for higher rate level parts, and shall not be remarked unless specified in the contract or purchase order
(see 6.2 and table IV).
TABLE IV. Failure rate substitution.
FR
FR
substitution
S
(0.001)
R
(0.01)
S
P
(0.1)
S, R
M
(1.0)
S, R, P
C
(non-ER)
S, R, P, M
3.33.5 Supplying to higher resistance temperature characteristics. Parts qualified and marked to lower resistance
temperature characteristics, with procuring agency approval, are substitutable for higher resistance temperature
characteristics and shall not be remarked unless specified in the contract or purchase order (see 6.2 and table V).
TABLE V. Characteristic substitution.
Characteristic
Characteristic
O
substitution
Symbol
percent/ C
±50
H
-
±100
F
H, F
±250
C
H, F, C
3.34 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
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.
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