MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various shell sizes and insert arrangements, they offer front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure connections. Constructed with high strength aluminum shells, they come with plating options like electroless nickel, offering durability and reliability. Meeting military specification MIL-DTL-38999 I, these circular receptacles are ideal for demanding applications requiring environmental resistance.