MIL-DTL-55302/21F
REQUIREMENTS:
Design and construction:
Dimensions and configuration: See figure 1.
Material:
Guide pins and guide bushings: Brass C21000, as specified in ASTM B134, or FC brass as specified in
ASTM B16.
Plating:
Contact:
Gold 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.
Contact identification:
Shall be numerical and sequential in the pattern indicated.
Pin size: 23
Wire size: 22
Current rating: 5 amperes, maximum.
Mating and unmating:
The maximum insertion force, in pounds, shall not exceed a value equal to .5 times the number of contacts,
and the withdrawal force, in pounds, shall be a minimum of .08 times the number of contacts, and shall not
exceed the measured insertion force.
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 volts rms, 60 Hz, ac.
High altitude: 500 volts rms, 60 Hz, ac.
PIN: M55302/21-(dash number from figure 1).
Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the
extent of the changes.
Reference documents. In addition to MIL-DTL-55302, this document references the following:
ASTM B488
MIL-DTL-55302/22
SAE-AMS-QQ-N-290
ASTM B16
ASTM B134
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