MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a rugged insert. Designed for harsh environments, they feature front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in various sizes, including coax and twinax. Crafted from durable aluminum, they come in plating options like cadmium and electroless nickel coatings, ensuring reliable performance. With an operating temperature range from -65 °C to 200 °C, they are ideal for demanding applications in defense, aerospace, and industrial sectors, providing secure and efficient electrical connections.