Tri-Star MIL-DTL-38999 Series III Connectors

Amphenol Aerospace

Amphenol® Tri-Star MIL-DTL-38999* Series III Connectors offer the highest performance capabilities for both general duty and severe environment applications. Meeting or exceeding MIL-DTL-38999 Series III requirements, the Tri-Start connector with standard metal shells. Solid metal to metal coupling, grounding fingers, electroless nickel plating, and thicker wall sections provide superior EMI shielding capability of 65dB minimum at 10 GHz. Recessed pins in this 100% scoop proof connector minimize potential contact damage. Improved interfacial seal design helps prevent electrolytic erosion of contacts. Shells of stainless steel or cadmium over nickel plating withstand a 500 hour salt spray exposure.  Operates under severe high temperature vibration, through 200°C. Available in a stainless steel shell, class RK, RS. Unique, self-locking, quick coupling connector eliminates lockwiring. Completely mates and self-locks in a 360° turn of the coupling nut. Uses standard MILDTL-38999 contacts, application tools, insert arrangements. Protection for sensitive circuitry without diodes, varistors, etc., with the use of the Faraday Cage principal which shunts high voltage, high current discharge events.


  • EMI Shielding
  • Contact Protection
  • Moisture Resistance
  • Corrosion Resistance
  • Vibration/Shock
  • Firewall Capability
  • Lockwiring Eliminated
  • Quick Coupling
  • Inventory Support Commonality
  • Electrostatic Discharge Protection (ESD)


  • Airborne Electronics/Avionics
  • Regional/Business Jet
  • Aircraft Engines/NACELLE
  • Military Airframe
  • Weapons/Munitions