Amphenol Aerospace LJT MIL-DTL-38999 Series I Connectors

Amphenol Aerospace LJT Connectors are subminiature cylindrical connectors qualified to MIL-DTL-38999 Series I. Amphenol Aerospace LJT Connectors provide scoop-proof contact protection and grounding fingers for electromagnetic interference (EMI) shielding. A five key / keyway design eliminates mismating and ensures error-proof alternate positioning. The series is designed for use in commercial and military aerospace applications.


  • Lightweight, space-saving design
  • Contact protection
    • 100% scoop-proof LJT design prevents bent pins and short circuits during mating
  • Quick positive coupling
    • Three-point bayonet lock system
  • Mismating eliminated with five key / keyway design
  • Error-proof alternate positioning
    • Ensured by different key / keyway locations
  • EMI shielding
    • Grounding fingers standard in LJT series
  • Contact options
    • Sizes 8, 10, 12, 16, 20, 22M, and 22D crimp, solder, PCB, wire wrap, coax, twinax, triax, thermocouple, fiber optic and filter
  • 9 shell sizes and variety of shell styles
  • Fixed solder contacts
    • Amphenol MIL-DTL-38999 Series I LJT available in solder versions as both commercial- and military-qualified to MIL-DTL-27599
  • Hermetic
    • Air leakage limited to 1cm3 X 10-7cm3 per second optional
  • Breakaway lanyard release style available in LJT plugs
    • Provides quick disconnect of the connector plug and receptacle with axial pull on the lanyard
  • Uses standard MIL-DTL-38999 contacts, insert arrangements, and application tools
  • RoHS-compliant products available


  • Aerospace
    • Commercial
    • Military
Published: 2020-04-14 | Updated: 2023-08-14