MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles, 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 ensure reliable connections. Constructed with aluminum shells and plated with options like electroless nickel and cadmium olive drab, they guarantee durability. The connectors, compliant with MIL-DTL-38999 II specifications, are ideal for military and aerospace applications, offering superior performance in challenging conditions.