MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65°C to 200°C, they offer reliability in extreme conditions. Available in various mounting options like front and rear wall mount, jam nut, and box mount receptacles, these connectors cater to diverse applications. They come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts for secure connections. Constructed with durable aluminum shells and offered in different plating options including cadmium and nickel, they ensure long-lasting performance. These military-spec connectors, compliant with RoHS regulations, are ideal for demanding industrial and aerospace environments.