MIL-DTL-38999 Series I connectors feature up to 128 contacts enclosed in an 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 versatility with front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Constructed with high-strength aluminum shells, these connectors come with a range of plating options including cadmium-free finishes. Utilizing M39029 rear release crimp contacts, they ensure reliable connectivity with sizes ranging from 22D to 8, including coax and twinax options. Suitable for military and industrial applications, these connectors are ideal for environments requiring durability and performance.