MIL-DTL-38999 Series I connectors are designed for harsh environments with up to 128 contacts in a sealed insert. Operating reliably in extreme temperatures ranging from -65 °C to 200 °C, these connectors come in various configurations including front and rear wall mounts, jam nut receptacles, and RFI grounding plugs. Compliant with military specifications, they feature high-strength aluminum shells available in different plating options such as cadmium-free finishes. With M39029 rear release crimp contacts, they offer secure connectivity in applications requiring durability and reliability. The straight plug design with bayonet coupling ensures easy installation and maintenance, making them ideal for demanding aerospace, defense, and industrial applications.