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, jam nut receptacles, and RFI grounding plugs, they offer versatility in military and aerospace applications. With 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells and offering plating options like cadmium and nickel, they ensure reliable performance. The RoHS compliant versions cater to environmental regulations. Ideal for demanding settings, these connectors provide secure and durable electrical connections in critical systems.