MIL-DTL-55302/6J
REQUIREMENTS
Design and construction:
Dimensions and configurations: See figure 1 and table I.
Material:
Guide pins and guide bushing: Brass composition B, 60,000 to 70,000 PSI tensile, in accordance with
ASTM B134, or FC brass in accordance with ASTM B16.
Plating:
Guide pins and guide bushings: Copper alloy in accordance with ASTM B134 or ASTM B16.
Contact: Gold overall in accordance with ASTM B488, type II, code C, class 1.27, over nickel plating in
accordance with SAE-AMS-QQ-N-290, class 2, 50 to 150 microinches, or localized contact finish with contact
engagement end gold plated with type II, class 1.27, code C in accordance with ASTM B488 over nickel
underplate, class 2, 30 to 150 microinches in accordance with SAE-AMS-QQ-N-290, and contact termination
end plating tin lead (50% to 70%) composition 100 microinches minimum thickness in accordance with
SAE-AMS-P-81728 over nickel underplate. Solder dipping is permitted providing it meets procedures and
requirements of MIL-STD-202, method 208.
Contact identification: Shall be alphabetical and sequential in the pattern indicated, using upper case
characters followed by lower case characters. Except dash number 06, the characters shall be numerical and
sequential in pattern indicated.
Pin size: 23.
Wire size: 22.
Current rating: 5 amperes, maximum.
Oversize pin exclusion: Not applicable.
Mating and unmating: The maximum insertion force, in pounds shall not exceed a value equal to 0.5 times the
number of contacts.
Contact engagement and separation forces: The individual contact withdrawal force shall be .5-ounce minimum
when tested with a minimum diameter test pin in accordance with SAE-AS31971-23X1.
Contact resistance: The average resistance of all contact pairs measured shall not exceed .010 ohm, and no
individual contact pair shall have a resistance exceeding .020 ohm.
Dielectric withstanding voltage:
Sea level: 1,000 V rms, 60 Hz, ac.
High altitude: 500 V rms, 60 Hz, ac.
Part or Identifying Number (PIN): M55302/6-(dash number from figure 1).
Changes from previous issue. The margins of this specification are marked with vertical lines to indicate where
changes from the previous issue were made. This was done as a convenience only and the Government
assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned
to evaluate the requirements of this document on the entire content irrespective of the marginal notations and
relationship to the last previous issue.
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