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. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility in military and aerospace applications. With straight, RFI grounding, and standard plug options, and utilizing M39029 rear release crimp contacts, they ensure reliable connectivity. Constructed with aluminum shells and offered in different plating options, including cadmium-free finishes, these connectors meet stringent quality standards. The straight plug version, with 21 gold-plated contacts, is ideal for EMI/RFI shielding in demanding environments, with a service rating of II for robust performance.