MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in a sealed insert, designed for harsh environments. Featuring various mounting options like front and rear wall mount, jam nut, and box mount receptacles, as well as straight and RFI grounding plugs, they provide versatility in deployment. With a wide range of shell sizes and insert arrangements, these connectors accommodate different contact sizes, including M39029 rear release crimp contacts. Crafted from aluminum, they come in plating options such as cadmium and nickel, meeting RoHS compliance. Operating between -65°C and 200°C, these connectors are ideal for rugged applications, ensuring reliable performance with 500 mating cycles.