MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with operating temperatures ranging from -65 °C to 200 °C. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility in installation. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure secure and reliable connections. Constructed with aluminum shells and offering multiple plating options such as electroless nickel and cadmium finishes, these connectors meet stringent military specifications. Designed for durability, they boast a mating life of 500 cycles and are suitable for applications requiring environment resistance.