38999 Series I, II, III

MIL-DTL-38999 series I connectors (Amphenol LJT series) are bayonet coupling connectors, with 100% scoop proof design, available for connector size 9 to 25. Only metal shell versions are available. (see LJT-HE308 catalog)

MIL-DTL-38999 series II connectors (Amphenol JT series) are bayonet coupling low profile connectors, with non scoop proof design, available for connector size 8 to 24. EMI grounding fingers are optional in JT plugs. Only metal shell versions are available. (see JT catalog )

MIL-DTL-38999 series III connectors (Amphenol TV / CTV series) are thread coupling connectors, with 100% scoop proof design, available for connector size 9 to 25. Metal and composite shell versions are available. EN3645 is the corresponding European standard for this series. (see Catalog Amphenol TV-CTV).
For more info, contact our technical support

The J is called “JAN brand” in the MIL-DTL-38999 standard.

This is a proof that our connectors are QPL approved by American authorities.

Corresponding MIL-DTL-38999 rev M standard paragraph:

3.52.2 JAN and J marking. The United States Government has adopted and is exercising legitimate control over the certification marks "JAN" and "J", respectively, to indicate that items so marked or identified are manufactured to, and meet all the requirements of specifications. Accordingly, items acquired to, and meeting all of the criteria specified herein and in applicable specifications, shall bear the certification mark "JAN" except that items too small to bear the certification mark "JAN" shall bear the letter "J". The "JAN" or "J" shall be placed immediately before the part number except that if such location would place a hardship on the manufacturer in connection with such marking, the "JAN" or "J" may be located on the first line above or below the part number. Items furnished under contracts or orders which either permit or require deviation from the conditions or requirements specified herein or in applicable specifications shall not bear "JAN" or "J". In the event an item fails to meet the requirements of this specification and the applicable specification sheets or associated detail specifications, the manufacturer shall remove completely the military part number and the "JAN" or the "J" from the sample tested and also from all items represented by the sample. The "JAN" or "J" certification mark shall not be used on products acquired to contractor drawings or specification. The United States Government has obtained Certificate of Registration Number 504,860 for the certification mark "JAN" and Registration Number 1,586,261 for the certification mark “J”.

Note: The “JAN” or “J” is not part of the PIN but indicates a certification.

  • How to order MIL-DTL-38999 series I connectors in military designation: see page 32 of LJT/HE308 catalogue LJT-HE308 catalogue
  • How to order MIL-DTL-38999 series II connectors in military designation: see page 24 of JT catalogue  JT catalogue
  • How to order MIL-DTL-38999 series III connectors in military designation: see page 37 of TV-CTV catalogue Catalogue Amphenol TV-CTV  

In MIL-DTL-38999 series II connectors (Amphenol JT connectors) and MIL-DTL-38999 series III connectors (Amphenol TV-CTV connectors), square flange receptacle are never delivered with sealing gasket.

In MIL-DTL-38999 series I connectors (Amphenol LJT series), only LJT00 wall mounting receptacles (also marked in HE308 00, or JMS27466 designations) are delivered with non conductive sealing gasket.    

Non conductive gaskets can be purchased separately, please consult us.

Yes, they are always delivered with non conductive sealing gaskets.

Screw are never delivered with any type of MIL-DTL-38999 square flange receptacles. Thread types are given in product catalogues, and customer choose by themselves appropriate screw they would like to use.

  • MIL-DTL-38999 series I connectors are generally not delivered with backshell, except for:
    • LJT xx RE versions (= JMS27xxx E), which are delivered with grommet nut
    • LJT xx RE xxx SR versions, which are delivered with strain relief
       
  • MIL-DTL-38999 series II connectors are generally not delivered with backshell, except for:
    • JT xx RE versions (= JMS27xxx E), which are delivered with grommet nut
    • JT xx RE xxx SR versions, which are delivered with strain relief 
       
  • MIL-DTL-38999 series III connectors are not delivered with any type of backshell.

To get further information on our backshell offer, please consult our backshell catalog.

Coupling torque values are available:

  • Crimp contacts:
    These are the most common contacts used with this type of connectors, and described in MIL-DTL-38999 and EN3645 standard for environmental connectors.
    When crimp contacts are delivered with connectors, they are not mounted into connector insert. 
     
  • Crimp contacts:
    We do not give any shelf life for our connectors since it depends on the mating cycles. For instance, for a standard TV connector, the mating cycle is 500. For a composite connector « CTV » fitted with « H » and « J » contact types, it’s 1500 cycles.
    When crimp contacts are delivered with connectors, they are not mounted into connector insert. 
     
  • Solder contacts: hermetic connectors only are equipped with solder contacts (solder cup or eyelet contacts).
    Additionally Amphenol has developed enhanced sealing connectors which can be equipped with solder cup contacts (only available in proprietary Amphenol designation).
    Solder contacts are always supplied already mounted into connector insert.
     
  • PC tail contacts: Amphenol has extended contact type range, proposing also PC tail contacts for PC board applications. PC tail contacts are available in different tail length and tail plating. Connector delivered with this type of contacts are only available in Amphenol proprietary part numbers, and PC tail contacts are already mounted into connector insert. 
     
  • Wire wrap contacts: available in proprietary connector part numbers, please consult us.
     
  • Press-fit contacts: not available in standard.

To get further information on contacts for MIL-DTL-38999 connector contacts, please consult our Contact catalog.

We do not give any shelf life for our connectors since it depends on the mating cycles. For instance, for a standard TV connector, the mating cycle is 500. For a composite connector « CTV » fitted with « H » and « J » contact types, it’s 1500 cycles. 

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