The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating efficiently in temperatures ranging from -65 °C to 200 °C, these connectors offer various mounting options including front and rear wall mount, jam nut, and box mount receptacles. Available in aluminum shells with plating options such as cadmium-free finishes, they ensure durable performance. With M39029 rear release crimp contacts in different sizes, these connectors are ideal for military and industrial applications requiring reliable connectivity in demanding conditions.