MIL-DTL-38999 Series II connectors, designed for harsh environments, feature up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors come in various mounting options such as front wall, rear wall, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts. The aluminum shells offer durability, with plating options including cadmium-free finishes. These connectors, meeting MIL-DTL-38999 II specifications, ensure reliable performance in demanding military and industrial applications.