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 like front and rear wall mount, jam nut, and box mount receptacles, they offer versatility. With 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable connections. Made of aluminum, they come with plating options such as cadmium and nickel for corrosion resistance. Ideal for military applications, these connectors ensure durability with RoHS compliant finishes.