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 and rear wall mount receptacles, jam nut receptacles, and RFI grounding plugs, these connectors offer versatility in connectivity solutions. With nine shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells, they come in plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, with RoHS certified cadmium-free finishes available. The MS27467 model specifically features 24 gold-plated contacts, suitable for high conductivity applications. Meeting MIL-DTL-38999 I military specifications, these circular connectors are ideal for demanding environments requiring reliable and durable electrical connections.