MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in a sealed insert, ideal for harsh environments. Featuring various mounting options like front and rear wall mount, jam nut, and box mount receptacles, they ensure versatility in installation. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for reliable connections. Crafted from durable aluminum, they come with plating options such as cadmium and nickel, meeting RoHS standards. With a wide temperature range from -65 °C to 200 °C, they guarantee operational efficiency in demanding conditions. Suitable for military and industrial applications, these connectors are designed for longevity and performance, with a service rating of I and mating life of 500 cycles.