The MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for extreme operating temperatures ranging from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors come in high strength aluminum shells with options for plating finishes including electroless nickel and cadmium-free coatings. The connector family offers front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, all meeting stringent military specifications. Utilizing M39029 rear release crimp contacts, they ensure reliable connectivity in harsh environments. Perfect for demanding applications, these connectors are ideal for use in aerospace, military, and industrial settings.