MIL-DTL-55302/128D
REQUIREMENTS
Design and construction:
Dimensions and configurations: See figures 1 and 2 and tables I and II.
Material:
Body: In accordance with MIL-DTL-55302.
Plating: The contact plating shall be gold in accordance with MIL-DTL-55302 as specified in
table II, over nickel in accordance with MIL-DTL-55302.
Contact cavities: See figure 1.
Printed wiring terminations: See figure 1.
Contact identification: See figure 1.
Polarization: Connector polarization may be accomplished by use of a keying plug (Part or Identifying
Number (PIN) M55302/127-00KY) which is inserted into the particular contact circuit to be keyed. Keying
plug is nylon in accordance with ASTM D4066.
Color: Natural.
Alignment: To be accomplished by user.
Method of mounting: Not applicable.
Oversize pin exclusion: Applies to sockets only, shall not accept a .050 inch diameter pin.
Contact engagement and separation force:
Engagement force: Shall be 6 ounces maximum after three insertions of a .0260 + .0000, -.0001
inch square pin.
Separation force: Shall be .75 ounce minimum.
Mating and unmating: The maximum connector mating force shall be 7 ounces times the number of
contact positions, and the minimum connector unmating force shall be .75 ounce times the number of
contact positions. For purposes of testing, the mating plug connector shall be considered to be the
correct number of .025 wrappost, gold plated. Maximum post engagement length is .323 inch and
minimum post engagement length is .308 inch, when connector is mounted as shown on figure 1.
Mating post: See figure 2. For total mating positions, see table I.
Current rating: 3.0 amperes maximum.
Contact resistance: No individual contact pair shall have a resistance exceeding 12 milliohms when
mated to a gold plated .025 wrappost.
Contact retention: Not applicable.
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