Active Electronics

RNJ - Rack & Panel

Rack & Panel Blind Mate connector for harsh environments

Thanks to its high level of expertise on MIL-DTL-38999 SERIES I, II & III & EN3645 connectors, Amphenol Socapex is the industry leader in D38999 circular connectors.  Offering QPL MIL-DTL-38999 and EN3645 qualified connectors with a large range of features including 38999 Rack & Panel, 38999 Miniature, 38999 Reduced Flange, 38999 Stand-off, 38999 Integrated Backshell & 38999 Power, Amphenol Socapex can answer all your needs through its line of reliable & qualitative products. Our 38999 connectors are available in Aluminum, Stainless Steel, Marine Bronze or Composite material with ROHS-compliant plating available in Black-Zinc Nickel and more. While the qualified Mil-Spec versions offer you a number of features, our customizable options are endless. We provide also free D38999 Series III CAD files.


Call our UK Sales team on 01494 441414

or please email us


Key features

  • Rack & Panel connectors for harsh environment

  • Very light weight vs ARINC 404 or 600

  • Derived from HE308/38999 series I

  • Realignment capability on 3 axis

  • 38999 level sealing with the specific membrane mounting


  • Battlefield Communication

  • Ground vehicles

  • Military avionics

  • Advanced industrial applications

Technical information

EMI shielding:

  • Shells are grounded before contact mating

  • Lightweight space saving design


  • 500 cycles

Moisture resistance:

  • in addition to interfacial seal, main joint souffler and rear gasket on the plug are set up for moisture sealing between connector halves

Corrosion resistance:

  • Olive drab cadmium over nickel plating on aluminium shell (withstands 500 hours of salt spray exposure) or electroless nickel

  • Free cadmium version also available. 8 shell sizes from 11 to 25

Contact protection:

  • 100% scoop-proof. The design prevents bent pins and a short circuit occuring during mating.

  • Between 1 and 128 contacts in accordance with Mil-C-39029 standard

  • Crimp contacts sizes 22D, 20, 16, 12, 8, 4, 00.

  • PCB contacts sizes 22D & 20 (size 16, 12, 8, please consult Amphenol)

  • Wire-wrap contacts sizes 22D & 20

  • Optical termini (POM series) in accordance with Mil-T-29504 standard

For environmental applications:

  • Supplied without rear accessories. Design provides serrations on rear threads of shells. Compatible with some M 85049 rear accessories for MIL-DTL-38999 I connectors. Please consult us.

  • Temperature range: -65°C +175°C

  • Insulation resistance > 5000 Mohms at ambient temperature under 500 Vcc

Download the Product Brochure


Since 1947, Amphenol Socapex has prescribed, designed and manufactured reliable and innovative interconnection solutions for harsh environments, specializing in standard and customized electrical and fiber optic connectors, contacts, accessories and cabling solutions.

Located in the Mont Blanc region of France and Pune in India, Amphenol Socapex has a presence in over 100 countries around the world.

Amphenol Socapex is part of Amphenol Corporation.