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 such as front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility in applications. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure reliable connectivity. Constructed with aluminum shells and offering plating options like gold, electroless nickel, and cadmium finishes, they provide durability and corrosion resistance. Meeting MIL-DTL-38999 II specifications, these circular connectors are ideal for military and aerospace applications requiring high performance and ruggedness.