MIL-DTL-38999 Series II connectors, designed for harsh environments, feature up to 128 contacts in an insert with environmental sealing. Operating at temperatures ranging from -65 °C to 200 °C, these connectors come in various configurations including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts. Constructed with aluminum shells and offering plating options like cadmium and nickel, they ensure reliable performance in demanding applications. RoHS compliant finishes are also available. Perfect for military and industrial use, these connectors provide secure and efficient electrical connections.