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 in various mounting options, including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. With nine shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts, ensuring secure connections. Constructed with aluminum shells and offering multiple plating options, such as gold and electroless nickel, they meet stringent military specifications for reliability. Suitable for applications requiring RoHS compliance, these connectors guarantee long-lasting performance in demanding environments.