MIL-DTL-38999 Series I 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 front wall mount, rear wall mount, and jam nut receptacles, these connectors meet stringent military specifications. With 52 insert arrangements and M39029 rear release crimp contacts in various sizes, including coax and twinax, they offer versatility in connectivity solutions. The high strength aluminum shells come with a choice of plating options, such as electroless nickel, cadmium olive drab, and black anodized aluminum, ensuring durability and reliability. RoHS certified finishes are available for environmentally conscious applications.