MIL-DTL-28731F
3.4.6.4 Type F fixed socket. Fixed actuating member with a female thread (engages with a type C or G
jackscrew).
3.4.6.5 Type G jackscrew. Rotatable actuating member with a male thread (engages with a type F fixed
socket). Actuating knob is for hand tightening only.
3.4.6.6 Type H jacksocket. Rotatable actuating member with a female thread (engages with type E
fixed screw). Actuating knob includes a screwdriver slot.
3.5 Interchangeability. All contacts shall be capable of being assembled in the molded insulators
(see 3.1) and be completely interchangeable with each other with respect to installation (physical) and
performance (function) as specified herein. All complete connectors including their complement of
contacts, having the same Part or Identifying Number (PIN) shall be completely interchangeable with each
other with respect to installation (physical) and performance (function) as specified herein. Tools shall be
capable of properly inserting and removing the contacts from the molded inserts. Evidence, such as
dimensional data, may be required by the Government in order to assure that contacts, complete
connector assemblies, and tools, will be interchangeable and meet the requirements of this specification.
3.5.1 Plugs and receptacles. Plugs and receptacles of a given size and design, manufactured by one
source to the requirements of this specification, shall be capable of mating with associated plugs and
receptacles manufactured to the requirements of this specification by other sources. The connector
assemblies having the same PIN shall be directly and completely interchangeable with respect to
installation and performance.
3.5.2 Loose crimp contacts. Removable contacts are to be included with the connector. For
connectors supplied with loose crimp contacts, the quantity of crimp contacts to be supplied with each
connector shall consist of a full complement of contacts plus one spare contact for connectors using 26
contacts of each size used shall be supplied.
3.6 Performance. Connectors shall be designed to meet the requirements specified herein.
3.6.1 Insulation resistance. When tested as specified in 4.7.2, the resistance shall be not less than
5,000 megohms, except after humidity exposure the resistance shall be not less than 1,000 megohms.
3.6.2 Temperature cycling. When tested as specified in 4.7.3, the connectors shall not show evidence
of physical damage.
3.6.3 Dielectric withstanding voltage. When tested as specified in 4.7.4, the connectors shall withstand
1,500 volts without flashover.
3.6.4 Contact retention. When tested as specified in 4.7.5, individual contacts shall withstand an axial
load of 10 pounds (4.54 kilograms) without damage to the contact, insert or contact retaining clip.
3.6.5 Vibration. When the complete connector assembly, wired with the appropriate size wire, is tested
as specified in 4.7.6 (10G, 10 to 500 Hz), there shall be no cracking, breaking, or loosening of parts.
There shall be no loss of electrical continuity with any of the contact circuits for more than 1 microsecond
with 100 milliamperes flowing in each circuit.
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