The MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they include front and rear wall mount, jam nut receptacles, and RFI grounding plugs. Constructed with high-strength aluminum shells, they come with plating options such as cadmium and nickel, ensuring durability in harsh environments. Utilizing M39029 rear release crimp contacts, these connectors guarantee reliable performance, meeting military specifications for rugged applications.