MIL-DTL-38999 Series I connectors feature up to 128 contacts, offering environmental sealing and a wide operating temperature range from -65 °C to 200 °C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, all designed for harsh environments. With 9 shell sizes and 52 insert arrangements available, they utilize M39029 rear release crimp contacts in various sizes. Made with high-strength aluminum shells, these connectors come with different plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, including RoHS-certified finishes. Ideal for military and industrial applications, they ensure reliable performance with features like bayonet coupling, gold contact plating, and 500 mating cycles. The connectors, suitable for straight plug mounting, provide conductivity and environmental resistance, meeting the stringent MIL-DTL-38999 I specifications.