MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various configurations including front and rear wall mount receptacles, they offer RFI grounding plugs and utilize M39029 rear release crimp contacts. With options for RoHS certified finishes, these high-strength aluminum connectors come in 9 shell sizes and 52 insert arrangements, offering versatility and reliability for demanding applications.