MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an insert, ideal for harsh environments. These circular receptacles come in various mount types including front and rear wall mount, and jam nut receptacles, all featuring RFI grounding plugs. With a wide operating temperature range from -65 °C to 200 °C, they ensure reliable performance in extreme conditions. Constructed with high-strength aluminum shells and available in different plating options, such as electroless nickel and cadmium finishes, these connectors guarantee durability and versatility. With RoHS certified options, they meet environmental standards while providing dependable connectivity for military and industrial applications.