MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front and rear wall mount options, along with jam nut receptacles and RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors come in high-strength aluminum shells with plating options such as electroless nickel and cadmium finishes. Meeting military specifications, they provide reliable performance with gold-plated removable crimp contacts and bayonet coupling. Suitable for demanding applications, these connectors ensure durability and conductivity in challenging environments.