The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for extreme operating temperatures ranging from -65 °C to 200 °C. Offering various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors are versatile for harsh environments. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors ensure durability and performance in military and industrial applications.