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 wall mount and jam nut receptacles, they offer RFI grounding plugs and utilize M39029 rear release crimp contacts in various sizes. With 9 shell options and 52 insert arrangements, these connectors are built for versatility. Constructed with high-strength aluminum shells, they come with plating choices such as cadmium and nickel, catering to diverse needs. Ideal for military and industrial applications, these connectors ensure reliable performance in challenging conditions.