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 styles including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility for different applications. Offering 52 insert arrangements and utilizing M39029 rear release crimp contacts, they ensure reliable connectivity. With aluminum shells and a choice of plating options including cadmium-free finishes, they meet RoHS compliance standards. Suitable for military and industrial use, these connectors provide durability and performance in demanding conditions.