MIL-DTL-38999 Series I connectors feature up to 128 contacts 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 front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. These connectors utilize M39029 rear release crimp contacts, with options for different plating finishes including cadmium-free. Constructed with high-strength aluminum shells, they ensure durability and reliability. Suitable for military and industrial applications, these connectors are engineered for superior performance in demanding environments.