MIL-DTL-55302/20E
REQUIREMENTS:
Design and construction:
Dimensions and configuration: See figure 1.
Material:
Guide sockets and guide bushings: Brass C21000, as specified in ASTM B134, or FC brass as specified in
ASTM B16.
Plating:
Guide sockets and guide bushings: Gold over copper, type II, class 1.27, code C, as specified in
ASTM B488.
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.
Contact engagement and separation force:
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 volts rms, 60 Hz, ac.
High altitude: 500 volts rms, 60 Hz, ac.
Part or Identifying Number (PIN): M55302/20-01.
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:
SAE-AMS-QQ-N-290
MIL-DTL-55302/19
SAE-AS31971
ASTM B16
ASTM B134
ASTM B488
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