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 from -65°C to 200°C. Available in front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs, these connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with high-strength aluminum shells and various plating options like light iridescent yellow cadmium and electroless nickel, they meet military specifications for reliable performance in demanding applications. RoHS compliant finishes are available, making them suitable for a wide range of industries requiring secure and durable connectivity.