MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65 °C and 200 °C, these connectors come in various configurations including front and rear wall mount, as well as jam nut receptacles. Compliant with military specification MIL-DTL-38999 I, they offer reliable connectivity with M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. The high strength aluminum shells are available in different plating options such as electroless nickel and cadmium finishes, with RoHS certified cadmium-free variants. Perfect for demanding applications, these connectors ensure durability with a service rating of M and 500 mating cycles.