The MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering robust environmental sealing for reliable performance in harsh conditions. With an operating temperature range of -65 °C to 200 °C, these connectors are designed for durability. Available in various shell sizes and insert arrangements, they accommodate 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, these connectors come in a range of plating options such as electroless nickel and cadmium finishes. The MIL-DTL-38999 I series includes receptacles with front wall mount, rear wall mount, and jam nut configurations, as well as RFI grounding plugs, ensuring versatility in installation. Ideal for military and aerospace applications, these connectors boast a service rating of I and are suited for environment-resistant wall and jam nut mounting receptacle and plug types.