Amphenol Hermetic D38999 Series I, II, and III

Amphenol Aerospace Hermetic MIL-DTL-38999 Series I, II, and III provide superior performance for both general-duty and severe-environment use. These connectors use glass-to-metal sealing technology to ensure leak-tight integrity, preventing moisture or gas ingress and maintaining reliable performance under pressure differentials. The Series I (LJT) and Series II (JT) use bayonet-style coupling, and Series III features a maximum operating temperature of +200°C. These connectors come with a durability of 500 cycles and a leak rate of ≤1 × 10⁻⁷cm3/s. Typical applications include C4ISR systems, space platforms, defense vehicles, missile and ordnance systems.

Features

  • Enables quick 3-point bayonet coupling
  • Ensures error prevention via key/keyway
  • Maintains hermetic, minimal air leakage
  • Offers a lightweight, space-saving design
  • Prevents mismating with keyway
  • Provides 100% scoop-proof contact protection
  • RoHS compliant and lead-free
  • Supports standard MIL-DTL-38999 compatibility

Applications

  • C4ISR
  • Defense and commercial aviation
  • Defense vehicles
  • Missiles and ordnance
  • Space platforms

Technical Specifications

Parameters Values
Leak Rate ≤1 × 10⁻⁷cm3/s
Maximum Operating Temperature +200°C 
Durability 500 cycles
Contact Sizes Available 12, 16, 20, 22, 22M, 22D