MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various styles including front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs for enhanced performance. With 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in sizes ranging from 22D to 8, catering to diverse applications. Constructed with high-strength aluminum shells and offering plating options like electroless nickel and cadmium finishes, they ensure durability and reliability. RoHS certified options are also available, meeting environmental standards. Perfect for military and industrial use, these connectors guarantee secure and efficient electrical connections in demanding settings.