MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert with an operating temperature range of -65°C to 200°C. The harsh environment connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, offered in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, these connectors are designed for durability, with high-strength aluminum shells and various plating options like cadmium and nickel. The connectors, compliant with MIL-DTL-38999 I specifications, cater to demanding applications with their reliable performance and RoHS-certified finishes.