MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. These connectors, compliant with military specification MIL-DTL-38999 II, offer various mounting options such as front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts. The connectors come in aluminum shells with plating options including cadmium and nickel finishes. With a bayonet coupling and straight plug design, they ensure reliable electrical connections in demanding applications.