MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors provide reliable connectivity in aerospace and military applications. Constructed with aluminum shells and offering plating options such as electroless nickel and cadmium finishes, they ensure durability and performance. RoHS compliant versions are also available.