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 versatility with options like front and rear wall mount receptacles, jam nut receptacles, and RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors ensure reliable connections, with plating options including cadmium-free finishes. Constructed with high-strength aluminum shells, they provide durability in demanding applications. With a bayonet coupling and straight plug design, they are ideal for military and industrial use, meeting MIL-DTL-38999 I specifications.