The 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 from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells, these connectors come with a range of plating options including cadmium-free finishes, meeting RoHS compliance standards. Perfect for military and industrial applications, they guarantee reliable performance with 500 mating cycles and conductivity.