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 of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front and rear wall mount options, along with jam nut receptacles and RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors come in high-strength aluminum shells with plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. RoHS certified finishes are also available. Designed to meet military specification MIL-DTL-38999 I, these circular plugs ensure reliable connectivity with gold-plated contacts, suitable for applications requiring conductivity and environmental resistance.