MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with operating temperatures ranging from -65 °C to 200 °C. Offering front and rear wall mount options, as well as jam nut receptacles, this connector family ensures secure connections. With 52 insert arrangements and M39029 rear release crimp contacts, it accommodates various contact sizes, including coax and twinax. Constructed with high-strength aluminum shells and available in different plating options, such as cadmium and electroless nickel, these connectors guarantee durability. The RoHS compliant versions provide environmentally friendly finishes, making them ideal for a wide range of applications.