MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. Environmentally sealed and with an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in demanding conditions. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they cater to diverse applications. With 52 insert arrangements and M39029 rear release crimp contacts, customization is possible. Constructed with aluminum shells and offering plating options like cadmium and nickel, they ensure durability. The connectors, compliant with RoHS regulations, are ideal for military and industrial use, guaranteeing longevity with 500 mating cycles.