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 front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs and utilize M39029 rear release crimp contacts in various sizes. With nine shell sizes and 52 insert arrangements, these connectors come in high strength aluminum shells with a range of plating options, including cadmium-free finishes. Designed for military specifications, they provide reliable connectivity in demanding applications.