MIL-DTL-28731/30C
NOTES:
1. Dimensions are in inches.
2. Metric equivalents are given for information only.
3. Tolerances between any two contact centers shall be ± .004 (0.10 mm).
4. Flatness, squareness, and parallelism shall be within dimensional tolerances.
5. Contact hole details shall be in accordance with configuration B.
6. Mating connector information:
M28731/30-0001 mate with M28731/29-0003 and -0005.
M28731/30-0002 mate with M28731/29-0004 and -0006.
M28731/30-0003 and -0005 mate with M28731/29-0001.
M28731/30-0004 and -0006 mate with M28731/29-0002.
7. Polarization information: Polarization sockets are provided for indexing to preclude intermixing of adjacent
connectors. By using a standard type spanner wrench, polarization sockets can be rotated to desired position.
For parts supplied directly to the government, polarization will be in the 1-1 position. For other polarization
positions see connector polarization guide configuration A (see marking, note 13d). For direct government
acquisition a tool is supplied in the unit package for polarization socket adjustment.
8. Contact and terminal designation: Contacts and terminals shall be designated on the insulator using letters in
the location shown on figure 1.
9. Tolerance shall be ± .010 (0.25 mm) unless otherwise specified.
10. Patent notice: Patent No. 3,675,185 owned by Elco Corporation. The government has a royalty-free license
under the above patent for the benefit of manufacturers of items called for in this specification, either for the
government or for use in equipment to be delivered to the government.
11. For direct government acquisition crimp contacts M28731/35-0001(see table I) are furnished in a plastic bag in
each unit package (see marking, note 13a).
12. For direct government acquisition wrappost contacts are M28731/36-0001 (see table I) and are factory installed
in a connector body (see marking, note 13a).
13. Marking:
a. Connectors supplied directly to the government shall be marked with the military Part or Identifying Number
(PIN) (see table I). Example: M28731/30-0001.
b. Connectors supplied with contacts to government end users shall be marked with the military PIN
(see table I). Example: M28731/30-0001.
c. Connectors supplied without contacts to government end users shall be marked as follows: Example:
M28731/30E (screw or socket type from table I). The user shall complete the remaining portion of the military
part number as shown in table I based upon contact type he assembles. Example: M28731/30E-0004.
d. Polarization position marking is not required unless otherwise specified. When required polarization marking
shall be in accordance with the connector polarization guide (see configuration B). The marking shall appear
following the PIN.
14. Applicable contact insertion and removal tools:
Insertion - MIL-I-81969/5-01
Removal - MIL-I-81969/4-02
15. Rectangular shield: Shall conform to MIL-DTL-28731/19, PIN M28731/19-0003 through M28731/19-0006
and -0015, -0016 for type A and B hardware.
16. Recommended hardware (not furnished) for panel mounting. (4) .112-40-UNC-2A (length to suit) bolt with No. 4
washer and mating nut.
FIGURE 1. Connector, female rectangular Continued.
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