High density connectors

Key features
  • Goes from 9 to 187 contacts
  • Qualified to MIL-DTL-38999 requirements
  • Drop-in replacement for standard D38999 connectors
  • Utilizes existing mil-qualified AS39029 size 23 contacts and D38999 insert materials
  • Available in Filter, Hermetic and customized versions
  • Battlefield Communication C4ISR
  • Grounded vehicles
  • Military avionics,
  • Space
  • Navy
Technical information


  • The only one to meet or exceed all MIL-DTL-38999 III performance tests
  • With up to 45% more contacts vs standard 38999, 187 contacts in size 25
  • 9 inserts tooled from size 9 to 25


  • The inserts are compatible with all 38999 III derived products:
  • Stand-off receptacle
  • Rack & Panel ranges : RNJ, RNJLP
  • Quick release connectors : SC39 - Plug with integrated backshell, ...
  • Crimp contacts can be used on embedded equipments, ground or avionics applications and PCB contacts

Technical Solution:

  • Increase the density of contacts up to 45%
  • Rear release # 23 QPL contacts with standard crimp barrels (Pin contact P/N 900049; Socket P/N 900048)
  • PCB contacts available
  • AWG 22 to 28 cable


  • To be used in standard or custom design shells (LJT, TV, RNJ, RNJLP, SC39) : same panel drilling
  • Possibility to use HD38999 for Gigabit applications (arrangement 09-09)

For those users who need in increase the amount of contacts in their application, the HD38999 series allows them to do so without increasing the size of their connector.


Brochure HD38999

Last update : Thu, 11/23/2017 - 08:48

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