MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, with an operating temperature range of -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they come in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts in various sizes, including coax and twinax, these connectors are designed for high-strength applications. Available in different plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, they meet RoHS certification standards. Perfect for harsh environments, these connectors ensure reliable performance with a mating life of 500 cycles.