The MIL-DTL-38999 Series I connectors offer robust performance in harsh environments, featuring up to 128 contacts sealed within their inserts. With an operating temperature range spanning from -65 °C to 200 °C, these connectors meet demanding military specifications. Available in various shell sizes and insert arrangements, they come in front wall mount, rear wall mount, and jam nut receptacle configurations. Utilizing M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options. Constructed with high-strength aluminum shells and offering multiple plating choices such as electroless nickel and cadmium finishes, these connectors guarantee reliable performance. RoHS certified options are also available, making them suitable for a range of applications.