MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they come in high-strength aluminum shells with options for plating including cadmium-free finishes. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure secure connections with sizes ranging from 22D to 8. These connectors, meeting military specification MIL-DTL-38999 I, are suitable for demanding applications requiring durable and high-performance electrical connectivity.