The MIL-DTL-38999 Series I connectors offer robust connectivity solutions with up to 128 contacts housed in a sealed insert. Designed for harsh environments, these connectors feature various mounting options including front and rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With a wide operating temperature range of -65 °C to 200 °C, they ensure reliable performance in demanding conditions. Available in 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 with a choice of plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. These connectors comply with RoHS regulations and are ideal for applications requiring rugged, environmentally resistant connectivity.