MIL-DTL-26500G
3.4.1.1.6 Visual indicator of completed coupling.
3.4.1.1.6.1 Threaded coupling. A circumferential stripe of contrasting color with the shell and with a
minimum width of .025 inch (0.635 mm) shall be placed on the threaded type receptacle. The dimension
from the front edge of the receptacle to the far side of the stripe shall be .433 ± .015 inch (0.635 ± 0.254
mm). The coupling ring shall cover the stripe when the connectors are completely mated.
3.4.1.1.6.2 Bayonet coupling. Three .025 ± .010 inch (0.635 ± 0.254 mm) wide axial stripes of
contrasting color shall be placed on the bayonet coupling receptacle; the stripes shall coincide with the
bayonet pin. The coupling ring shall have three similar stripes coinciding with the lock positions. The
receptacle line and the coupling ring line shall align within .015 inch (0.381 mm) when the connectors are
completely mated.
3.4.1.1.7 Screw threads. Screw threads shall be in accordance with MIL-S-7742 and FED-STD-H28 as
applicable. Out-of-roundness is not objectionable if the threads can be checked without forcing the
thread gauges. All threads surfaces including the lead thread shall be smooth enough that they will not
be galled, cut, or otherwise damaged by mating, or cause damage to the mating connector. All threads
shall be continuous and not broken or interrupted, except where otherwise required be the military
standard.
3.4.1.1.8 Lubrication. Internal coupling ring threads shall be coated with a lubricant conforming to
MIL-PRF-46010.
3.4.1.1.9 Rear connector seal. Sealing of the wires and back of the connectors shall be accomplished
without aid of auxiliary compression devices.
3.4.1.2 Insert.
3.4.1.2.1 Construction. The inserts shall be designed and constructed to eliminate all air paths
between contacts. The socket insert face shall be of a resilient material. An integrally molded resilient
static peripheral seal shall be provided that shall create a seal before mating is completed, as shown on
the military standard. The entire insert and wire sealing member shall function as an integral part. Its
separate parts shall be bonded and shall provide suitable sealing around the wire shown in table I for the
appropriate contact sizes. The inserts shall be designed so that positive locking of the contacts in the
inserts is provided. The contact retaining device shall be free of foreign material, adhesive, or any
obstruction that would prevent contact insertion and positive retention. Contacts for the hermetic
receptacle shall be fused in place with vitreous material and a resilient gasket shall be cemented to the
face of the insert. No metal lattice material shall be used.
TABLE I. Wire sealing accommodation of contact sizes and wire dimensions.
Contact
Range of outside diameter of all
Wire gauge to which
insulted conductors (inches)
contact is required to crimp
size
No. 20
.040 to.090
No. 24, 22, or 20
No. 16
.068 to.130
No. 20, 18, or 16
No. 12
.106 to.170
No. 14 or 12
Shielded
.095 to .145
No. 22, 20, and 18
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