The MIL-DTL-38999 Series II connectors feature up to 128 contacts within an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available as front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles, they offer versatility in installation. With options for straight, RFI grounding, and standard plugs with a 90-degree cable clamp, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating various needs. Utilizing M39029 rear release crimp contacts, they ensure secure connections. Constructed with aluminum shells and offered in different plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, these connectors meet stringent requirements. Their RoHS certified finishes make them environmentally friendly, suitable for a wide range of applications.