The MIL-DTL-38999 Series II connectors boast exceptional durability and versatility, featuring up to 128 contacts housed in a robust insert. Engineered for harsh environments, these connectors are sealed to protect against the elements and can operate reliably in temperatures ranging from -65 °C to 200 °C. Available in various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility for diverse applications. With a selection of plating options including gold, electroless nickel, and cadmium finishes, these connectors ensure reliable conductivity. Their aluminum shells and RoHS compliance make them environmentally friendly choices. Suitable for military and industrial use, these connectors are designed for longevity, with a service rating of 500 cycles and a service class detail of Environment Resistant Box and Through Bulkhead Mounting Receptacle Types.