The MIL-DTL-38999 Series II connectors offer robust performance with up to 128 contacts in an environmentally sealed insert. Operating in extreme temperatures ranging from -65 °C to 200 °C, they ensure reliable connectivity in harsh conditions. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, these connectors meet diverse application needs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options including cadmium and nickel, they guarantee durability and corrosion resistance. With a bayonet coupling, these connectors provide easy and quick mating. Suitable for military and industrial use, they are designed for high-performance applications. RoHS compliant options are available for environmentally conscious projects.