38999 Series

JT - 38999 Series II

MIL-DTL-38999 Series II qualified
Part Number :
38999 Series

JT - 38999 Series II

MIL-DTL-38999 Series II qualified

Key features

  • Low profile design lightweight & space saving
  • 9 shell sizes from 08 to 24
  • More than 60 contacts arrangements, from 1 to 128 contacts
  • Several materials et platings available, with RoHS & REACH compliant versions


  • Military Avionics
  • Commercial Avionics
  • Military vehicles
  • C5ISR
Technical information

Product benefits :

  • Several receptacles style : Square flange, Jam nut, In-line… 
  • Quick coupling, fully mated in a 1/4 turn of the coupling nut

Materials & Platings :

  • Aluminum : Olive Drab Cadmium, Nickel, Black Zinc Nickel 
  • RoHS

Contacts types & terminations :

  • More than 50 arrangements of contacts
  • Contacts size 22D to 12
  • Signal and power 
  • Crimp, PC tail

Environmental Characteristics :

  • 500 mating cycle
  • -65°C  to 175°C or 200°C  depending on material & plating
  • From 48 to 500 hours depending on material & plating

Electrical characteristics :

  • Insulation resistance @Ambient : 105 mΩ


1 documents

Catalog MIL-DTL-38999 & Derivates

Last update : 05/03/2024
Product change notifications (PCN)
1 notifications
#PCN 130559
LJT - HE308 - 38999 Series I
JT - 38999 Series II
TV-CTV - D38999 Series III

Replacement of white ink marking with laser marking on some inserts’ interfacial seals for MIL-DTL-38999 Series I, II, III type and derivative connectors.

Request form to receive the detailed « Product Change Notification »

J'accepte les conditions générales
38999 reduced flange jam nut receptacle
I/O Connectors
38999 Series

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JT - 38999 Series II description

The JT connectors from Amphenol Socapex are designed in accordance with the MIL-DTL-38999 series II standard, making them ideal for use in the military and aerospace industry. These connectors offer a range of features that make them a reliable and durable solution for various applications, including battlefield communication, grounded vehicles, and military avionics. 
One of the key features of the JT connectors is their large variety of contact arrangements and shell types, which allows for customization to meet specific requirements of various applications. Additionally, the connectors provide maximum weight/space savings, making them suitable for use in applications where space is limited. This feature is particularly important in the aerospace industry, where every ounce counts. The JT connectors also provide 100% contact protection, which ensures that the contacts are not damaged during use, providing additional reliability and durability. They are available in both metallic and composite versions, providing options for different environmental conditions and weight requirements.
The JT connectors are available in three finish options: olive drab cadmium plating, electroless nickel plating, and black zinc nickel plating. These finishes offer corrosion resistance and protect the connectors from harsh environmental conditions.
The JT connectors are available in nine shell sizes, ranging from 08 to 24, which provides flexibility in their use across different applications. The connectors offer more than 50 arrangements of contacts, with size 12, 16, 20, and 22D contacts available. Additionally, crimp, PCB, signal, and power contacts are available, providing customization options for various applications. While pin contacts are not scoop-proof protected, the JT connectors offer improved interfacial seal that ensures sealing around each contact, providing additional protection against environmental factors. Additionally, the connectors offer optional grounding fingers on the plug shell, providing EMI/RFI protection.
Finally, the JT connectors are very low profile and lightweight, making them ideal for applications where space and weight are critical factors.