MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various configurations, including front and rear wall mount receptacles and jam nut receptacles, they offer RFI grounding plugs for added protection. With 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. Constructed with high-strength aluminum shells, they come in a range of plating options, such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. The selection also includes RoHS certified, cadmium-free finishes, ensuring compliance with environmental standards. Perfect for military and industrial applications, these connectors provide reliable performance in demanding conditions.