MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in a sealed insert, designed for harsh environments. Operating reliably between -65 °C and 200 °C, they come in various configurations including front and rear wall mount, jam nut receptacles, and RFI grounding plugs. Featuring 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts, accommodating sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells and offering multiple plating options such as cadmium and nickel, they ensure durability and performance in demanding applications. RoHS certified finishes are available, meeting environmental standards. Ideal for military and industrial use, these connectors provide reliable electrical connections in challenging conditions.