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 with M39029 rear release crimp contacts, they offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Constructed with high-strength aluminum shells and offered in different plating options like cadmium and nickel, these connectors ensure durability and performance. Compliance with RoHS regulations further enhances their suitability for diverse applications.