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 various shell sizes and insert arrangements, they offer front and rear wall mount options, as well as jam nut receptacles. Utilizing M39029 rear release crimp contacts, these connectors come in high-strength aluminum shells with plating options including electroless nickel and cadmium finishes. RoHS compliant versions are also available, ensuring reliability and performance in demanding applications.