MIL-DTL-38999 Series I connectors feature up to 128 environmentally sealed contacts, 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 wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Crafted from high-strength aluminum, these connectors come in multiple plating options including cadmium-free finishes for RoHS compliance. Utilizing M39029 rear release crimp contacts, they ensure reliable connections with gold-plated sockets. Suitable for military and industrial applications, these circular plugs guarantee conductivity and environmental resistance, making them ideal for demanding environments.