MIL-DTL-38999 Series I connectors offer up to 128 contacts in a sealed insert, built for harsh environments with an operating range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they feature front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors come in high strength aluminum shells with plating options including cadmium and nickel. RoHS compliant finishes are also available. Designed for durability, they ensure reliable connectivity with 500 mating cycles, making them ideal for demanding applications in military and industrial settings.