D38999/49 Defense Supply Center, D38999/49 Datasheet - Page 14

• Manufacturer Part Number: D38999/49
• Description: D38999K / D38999J 500 Cycle Contact
• Manufacturer: Defense Supply Center

that an audible click is evident when proper coupling is accomplished. Provision shall be made for visual
determination that proper coupling has been achieved.
clockwise rotation of the coupling nut and shall provide shell-to-shell bottoming. An anti-decoupling device
shall be provided to maintain complete coupling. A red band shall be located on the receptacle so as to be
visible when unmated and fully covered when completely mated.
of the coupling ring. The coupling ring shall incorporate a positive detent action at both the ready-to-mate
and the mated positions providing both an audible and tactile indication of complete mating. A red band
shall be located on the plug so as to be fully visible when the coupling ring is in the ready-to-mate position,
and fully covered when the coupling ring is in the completely mated position. Coverage of the red band
during mating without the action of the audible and tactile indicators constitutes an unmated connector.
means of integral keys and suitable matching keyways on the counterpart. Polarization shall be
accomplished before initial engagement of the coupling ring. During axial engagement, pins shall not touch
sockets or the insert face until polarization has been achieved.
as indicated on figures 5, 6, and 7.
the coupling threads of series III plug connectors may be coated with a suitable lubricant. Rear accessory
threads of all connectors and receptacle coupling areas shall not be lubricated.
(electrical or physical) is not possible in the event that a plug with pin contacts is inadvertently mated with a
receptacle with pin contacts.
to prevent a plug with pin contacts from being mated with a receptacle with pin contacts.
contact between it and the complete inner perimeter of the shell, any resulting cavity between the insert and
the shell shall be filled with RTV silicone conforming to MIL-A-46146, or equivalent. The silicone shall
adhere to both the shell and the grommet.
completely interchangeable with each other with respect to installation and performance.
removal forces shall not exceed the requirements of table III.
detrimental to the operation of the connector.
be no blistering, peeling or separation of plating or other damage detrimental to the operation of the
connector.
3.4.6.2.1 Series I and II. For series I and II, a detent shall be provided in the coupling mechanism so
3.4.6.2.2 Series III. For series III, complete coupling shall be accomplished by approximately 360
3.4.6.2.3 Series IV. Complete coupling shall be accomplished by approximately 90 clockwise rotation
3.4.6.3 Polarization of connector shells. Polarization of connector shells shall be accomplished by
3.4.6.3.1 Alternates. Shells shall also be supplied with the keys (or keyways) rotated from the normal
3.4.6.4 Lubrication. Bayonet coupling ramps, spring washers, the breech mechanism on series IV, and
3.4.6.5 Pin-to-pin mating prevention (series I, III, and IV).
3.4.6.5.1 Series I and III. Series I and III connectors shall be designed such that pin-to-pin contact
3.4.6.5.2 Series IV. Series IV connectors shall be provided with key and keyway widths arranged so as
3.4.7 Cavity fill (environment resisting classes). If the rear grommet design does not allow for intimate
3.5 Interchangeability. All connectors having the same Part or Identifying Number (PIN) shall be
3.6 Maintenance aging (except hermetics). When tested as specified in 4.5.2, the contact installing and
3.7 Thermal shock (hermetics only). When tested as specified in 4.5.3, there shall be no damage
3.8 Temperature cycling (all classes except hermetics). When tested as specified in 4.5.4, there shall
MIL-DTL-38999K
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