The MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they provide versatility in installation. These connectors, compliant with military specification MIL-DTL-38999 II, utilize M39029 rear release crimp contacts and are available in 9 shell sizes and 52 insert arrangements. Constructed with aluminum shells and offering multiple plating options including gold, electroless nickel, and cadmium-free finishes, they ensure reliable performance in demanding conditions. Suitable for applications requiring environmental resistance, these connectors are ideal for military and industrial use.