MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts within a sealed insert. With an operating temperature range from -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they are versatile for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells, they are plated with options including cadmium-free finishes for RoHS compliance. Ideal for military and industrial use, these connectors ensure secure and durable electrical connections.