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. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they ensure reliable connectivity. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in various sizes, including coax and twinax. Constructed with high-strength aluminum shells, they come with plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. These connectors meet MIL-DTL-38999 I military specifications and are RoHS compliant, making them ideal for demanding applications that require durability and performance in challenging environments.