MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, they come in high-strength aluminum shells with various plating options such as cadmium-free finishes. These connectors, compliant with military specification MIL-DTL-38999 I, offer reliable performance for applications requiring rugged and environmentally sealed connectivity.