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 configurations including front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs and utilize M39029 rear release crimp contacts. With 9 shell sizes and 52 insert arrangements, these connectors come in high-strength aluminum shells with plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, including RoHS certified finishes. The MS27505 connectors, part of the 38999 Series I, are ideal for military and industrial applications requiring reliable and durable electrical connections.