MIL-DTL-55302/158C
REQUIREMENTS
Design and construction:
Dimensions and configuration: See figure 1, 2, and 3.
Material and finish:
Contact plating: The plating in the contact area shall be gold in accordance with ASTM B488, type
II, code C or D, class 1 over nickel plating in accordance with SAE-AMS-QQ-N-290, 30 to 150
microinches. The contact mating area is defined on figure 3.
Nonfunctional area: Any portion of the contact other than the contact mating area or termination
area can be plated in accordance with MIL-DTL-55302.
Contact identification: See figure 1.
Body design: The insulator body of each receptacle may be two-piece construction secured by
mechanical means.
Contact separation force: Separation force shall be .5 ounce minimum, using the following test pins:
1. Insert and withdraw test pin A (see figure 2).
2. Insert test pin B (see figure 2) fully and withdraw test pin B .071 inch and then measure
separation force.
Mating and unmating: The maximum mating force, in pounds, shall not exceed a value equal to 0.25
times the number of contacts, and the withdrawal force, in pounds, shall be a minimum of 0.025 times
the number of contacts and shall not exceed the measured insertion force, when the housing is loaded
with contacts and mated with connector in accordance with MIL-C-55302/157.
Contact rating: 3.0 amperes maximum per contact.
Contact resistance: No individual contact pair shall have a resistance exceeding .020 ohm.
Contact retention: 3 pounds minimum per contact.
Dielectric withstanding voltage:
Sea level: 1,000 volts rms, 50 or 60 hertz.
High altitude: 300 volts rms, 50 or 60 hertz.
Part or Identifying Number (PIN): M55302/158- (dash number from figure 1).
Changes from previous issue. Marginal notations are not used in this revision to identify changes with
respect to the previous issue due to the extent of the changes.
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