38999 Series


Internationally accepted NATO Standard connector
Part Number :
38999 Series


Internationally accepted NATO Standard connector

Key features

  • Derived from MIL-DTL-38999 series I & II, also called Series 1.5
  • Reverse Bayonet coupling connectors with a large variety of contact arrangements and shell types
  • More than 60 contacts arrangements, from 1 to 128 contacts
  • Ruggedized product with an high resistance to shocks & vibrations
  • Several materials et platings available, with RoHS & REACH compliant versions


  • Military Vehicles 
  • Battefield communication C5ISR
  • Military Avionics
Technical information

Product benefits :

  • 100% scoop-proof design – basic MIL-DTL-38999 Series I lengths
  • Standard mounting dimensions – MIL-DTL-38999, Series II dimensions
  • Several receptacles style : Square flange, Jam nut, In-line… 
  • Quick coupling, fully mated in a 1/4 turn of the coupling nut
  • Compliance with European Specifications – PAN6433-2, LN29729

Materials & Platings :

  • Aluminium : Olive drab Cadnium, Nickel, Black Zinc nickel
  • RoHS

Contacts types & terminations :

  • More than 60 arrangements of contacts
  • Contacts sizes 22D to 12
  • Power, Signal, Coax, High Speed (#12)
  • Crimp, PC tails

Environmental Characteristics :

  • 500 mating cycles
  • -65°C  to 175°C or 200°C  depending on material & plating
  • From 48 to 500 hours for aluminum
  • IPX7 when mated and fully cabled

Electrical characteristics :

  • Shell to shell conductivity 5 mΩ max
  • 100 Mhz to 10Ghz - minimum attenuation of 50dB
  • Contact rating from 5 to 23 Amps
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SJT description

The Amphenol Socapex SJT connector is a ruggedized product designed to meet the demands of harsh environment applications in military and aerospace industries. It is derived from the MIL-DTL-38999 series I & II, also called Series 1.5, and is an internationally accepted NATO Standard connector. The SJT connector features reverse bayonet coupling connectors with a large variety of contact arrangements and shell types. It offers more than 60 contact arrangements, ranging from 1 to 128 contacts, making it a versatile solution for a wide range of applications. The connector is also designed to withstand shocks and vibrations, ensuring reliable performance in rugged environments. Amphenol Socapex offers several receptacle styles for the SJT connector, including square flange, jam nut, and in-line, to accommodate various installation requirements. The connector features quick coupling, fully mated in a 1/4 turn of the coupling nut, making it easy to install and remove. The SJT connector is available in several materials and platings, including olive drab cadmium, nickel, and black zinc nickel, to provide corrosion resistance and durability in harsh environments. The connector also complies with European Specifications - PAN6433-2, LN29729, and is RoHS and REACH compliant. The SJT connector supports more than 60 arrangements of contacts, with contact sizes ranging from 22D to 12. It supports power, signal, coax, and high-speed (#12) contacts, and it can be terminated using crimp or PC tails. In terms of environmental characteristics, the SJT connector can withstand up to 500 mating cycles and operate in temperatures ranging from -65degC to 175degC or 200degC depending on material and plating. It also offers IPX7-rated protection when fully mated and cabled. Overall, the Amphenol Socapex SJT connector is a reliable and versatile solution for harsh environment applications that require ruggedness, quick coupling, and excellent performance.