MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These connectors include various receptacle types such as front and rear wall mount, jam nut, and box mount options, with plugs available in straight, RFI grounding, and 90-degree cable clamp configurations. Compliant with military specification MIL-DTL-38999 II, they offer reliable connectivity with M39029 rear release crimp contacts, suitable for sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offering multiple plating options, including RoHS-certified finishes, these connectors ensure optimal performance in demanding applications requiring EMI/RFI shielding and environmental resistance.