MIL-DTL-38999 Series I connectors feature up to 128 contacts in an 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 and RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors come in high-strength aluminum shells with plating options including cadmium-free finishes. Meeting military specification MIL-DTL-38999 I, they provide reliable connectivity with gold-plated contacts, suitable for demanding applications requiring environment resistance.