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 options such as 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 offering plating options including cadmium-free finishes, they meet RoHS compliance standards. Suitable for military and aerospace applications, these connectors provide durability and performance in demanding environments.