MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, offering versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes, including coax and twinax. Constructed with high strength aluminum shells and offered in different plating options such as cadmium and electroless nickel, these connectors guarantee durability and reliability. Meeting military specification MIL-DTL-38999 I, they are suitable for applications requiring secure and robust electrical connections in demanding conditions, with RoHS certified finishes available.