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 configurations including front and rear wall mount, as well as jam nut receptacles, these connectors offer reliable RFI grounding. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax). Constructed with high-strength aluminum shells, they come with a choice of plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, including RoHS compliant finishes. Perfect for military and industrial applications, MIL-DTL-38999 Series I connectors provide a durable and secure electrical connection.